{"title":"Blossom End Rot","description":"\u003cp\u003e\u003cstrong\u003eBlossom end rot\u003c\/strong\u003e is the sunken brown patch at the base of tomatoes, peppers and courgettes. It happens when calcium does not reach the developing fruit in time, usually because of uneven watering rather than a shortage of calcium in the soil. The fix is steady watering plus a calcium feed to support supply. Which calcium feed depends on what you need:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid Gypsum:\u003c\/strong\u003e best once symptoms appear. Fast-acting calcium that does not raise soil pH, so it is the first choice for quick correction.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid Cal-Phos:\u003c\/strong\u003e calcium with extra phosphorus. Choose this if you also want a phosphorus boost alongside the calcium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium Carbonate:\u003c\/strong\u003e calcium that also raises pH. Use where your soil is acidic and you want to lift pH at the same time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicronised Rock Phosphate:\u003c\/strong\u003e slow-release calcium and phosphorus. A long-term soil source rather than a quick fix.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCal-Mag:\u003c\/strong\u003e prevention. A balanced calcium and magnesium feed that keeps levels topped up so the deficiency is less likely to arise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEven watering does most of the work; the right calcium feed covers the rest.\u003c\/p\u003e","products":[{"product_id":"powdered-cal-mag-supplement-boron-fulvic-acid-dr-forest","title":"Cal-Mag for Plants | pH Neutral Gypsum \u0026 Kieserite | Calcium Magnesium Sulphur Feed | Dr Forest","description":"\u003c!-- Dr Forest — Cal-Mag for Plants — Shopify Product Description (v1.0 Design System, 5-tab) --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Prefix: cm. Pure CSS radio tabs + checkbox FAQs. No JS, no @import, :root variables. --\u003e\n\u003cstyle\u003e\n  .drf-wrap {\n    --drf-grn:        #1B3D2F;\n    --drf-grn-dark:   #0F2A1F;\n    --drf-grn-light:  #E8F0EB;\n    --drf-grn-mid:    #4a7a5e;\n    --drf-cream:      #F5F2EC;\n    --drf-gold:       #C5A55A;\n    --drf-gold-light: #FAF7F0;\n    --drf-muted:      #3A4A40;\n    --drf-white:      #FFFFFF;\n    --drf-border:     #d4cfc5;\n  }\n\n  \/* ── RESET \u0026 BASE ── *\/\n  .drf-wrap *, .drf-wrap *::before, .drf-wrap *::after { box-sizing: border-box; margin: 0; padding: 0; }\n  .drf-wrap { font-family: 'Jost', 'Helvetica Neue', Arial, sans-serif; font-weight: 400; color: #2c2c2c; font-size: 16px; line-height: 1.65; width: 100%; max-width: 100%; margin: 0 auto; overflow: hidden; }\n\n  \/* ── TYPOGRAPHY ── *\/\n  .drf-wrap h2 { font-family: 'Cormorant Garamond', Georgia, serif; font-weight: 400; font-size: 2em; color: var(--drf-grn); line-height: 1.2; margin-bottom: 0.5em; }\n  .drf-wrap h3 { font-family: 'Cormorant Garamond', Georgia, serif; 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align-items: center; justify-content: center; text-align: center; min-height: 38px; line-height: 1.3; }\n  .drf-badge-green { background: #eaf4ea; color: #2d6a2d; border: 1px solid #c0d8b0; }\n\n  \/* ── STAT BOXES (grid-line trick — white cards, 2px gold top border) ── *\/\n  .drf-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--drf-border); border: 1px solid var(--drf-border); margin: 1.4em 0; }\n  .drf-stat { background: var(--drf-white); border-top: 2px solid var(--drf-gold); padding: 0.8em 0.5em; text-align: center; }\n  .drf-stat-number { font-family: 'Cormorant Garamond', Georgia, serif; font-size: 1.6em; font-weight: 400; color: var(--drf-grn); line-height: 1.1; display: block; }\n  .drf-stat-label { font-size: 0.6em; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--drf-gold); display: block; margin-top: 0.3em; }\n\n  \/* ── TABS (pure CSS radio inputs — NO JavaScript) ── *\/\n  .drf-tabs-wrap { max-width: 100%; overflow: hidden; }\n  .drf-tabs-wrap input[type=\"radio\"] { display: none; }\n  .drf-tab-labels { display: flex; align-items: stretch; border-bottom: 2px solid var(--drf-border); margin-bottom: 1.4em; }\n  .drf-tab-labels label { flex: 1 1 0; padding: 0.75em 0.3em; font-size: 0.72em; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: #8b6914; background: var(--drf-gold-light); cursor: pointer; text-align: center; display: flex; align-items: center; justify-content: center; border-bottom: 3px solid var(--drf-gold); margin-bottom: -2px; transition: all 0.15s; }\n  .drf-tab-labels label:hover { color: var(--drf-grn); background: var(--drf-grn-light); border-bottom-color: var(--drf-grn); }\n  .drf-panel { display: none; }\n\n  \/* ── TAB ACTIVE STATES (5-tab) ── *\/\n  #drf-cm-tab1:checked ~ .drf-tab-labels label[for=\"drf-cm-tab1\"],\n  #drf-cm-tab2:checked ~ .drf-tab-labels label[for=\"drf-cm-tab2\"],\n  #drf-cm-tab3:checked ~ .drf-tab-labels label[for=\"drf-cm-tab3\"],\n  #drf-cm-tab4:checked ~ .drf-tab-labels label[for=\"drf-cm-tab4\"],\n  #drf-cm-tab5:checked ~ .drf-tab-labels label[for=\"drf-cm-tab5\"] { color: var(--drf-grn); background: var(--drf-grn-light); border-bottom-color: var(--drf-grn); font-weight: 600; }\n\n  #drf-cm-tab1:checked ~ .drf-panels #drf-cm-panel1,\n  #drf-cm-tab2:checked ~ .drf-panels #drf-cm-panel2,\n  #drf-cm-tab3:checked ~ .drf-panels #drf-cm-panel3,\n  #drf-cm-tab4:checked ~ .drf-panels #drf-cm-panel4,\n  #drf-cm-tab5:checked ~ .drf-panels #drf-cm-panel5 { display: block; }\n\n  \/* ── CALLOUT BOXES (square corners) ── *\/\n  .drf-callout { background: var(--drf-grn-light); border-left: 3px solid var(--drf-grn); padding: 1em 1.2em; margin: 1.3em 0; border-radius: 0; }\n  .drf-callout-gold { background: var(--drf-gold-light); border-left-color: var(--drf-gold); }\n  .drf-callout p:last-child { margin-bottom: 0; }\n  .drf-callout-title { font-size: 0.7em; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--drf-grn); margin-bottom: 0.4em; display: block; }\n  .drf-callout-gold .drf-callout-title { color: var(--drf-gold); }\n\n  \/* ── DARK CALLOUT (hard rules, supplement deflection, boron caution) ── *\/\n  .drf-callout-dark { background: var(--drf-grn-dark); border-left: 3px solid var(--drf-gold); padding: 1.1em 1.3em; margin: 1.3em 0; border-radius: 0; color: #E6E2D6; }\n  .drf-callout-dark p { color: #E6E2D6; margin-bottom: 0; }\n  .drf-callout-dark strong { color: #FFFFFF; font-weight: 500; }\n  .drf-callout-dark .drf-callout-title { color: var(--drf-gold); }\n\n  \/* ── PULL QUOTE ── *\/\n  .drf-pullquote { font-family: 'Cormorant Garamond', Georgia, serif; font-style: italic; font-weight: 400; font-size: 1.4em; line-height: 1.4; color: var(--drf-grn); text-align: center; max-width: 600px; margin: 1.6em auto; padding: 1em 0; border-top: 1px solid var(--drf-gold); border-bottom: 1px solid var(--drf-gold); }\n\n  \/* ── INGREDIENT \/ MECHANISM CARDS (square corners) ── *\/\n  .drf-mech { border: 1px solid var(--drf-border); border-left: 3px solid var(--drf-gold); padding: 1em 1.2em; margin: 0.8em 0; border-radius: 0; background: var(--drf-white); }\n  .drf-mech-num { font-family: 'Cormorant Garamond', Georgia, serif; font-size: 2em; font-weight: 400; color: var(--drf-gold); line-height: 1; }\n  .drf-mech h4 { margin-top: 0.2em; color: var(--drf-grn); text-transform: none; letter-spacing: 0; font-size: 1.05em; font-family: 'Cormorant Garamond', Georgia, serif; font-weight: 500; }\n  .drf-mech p { font-size: 0.92em; color: var(--drf-muted); margin-bottom: 0; }\n\n  \/* ── RATE CARDS (gold hairline heading) ── *\/\n  .drf-rate { border: 1px solid var(--drf-border); padding: 1em 1.2em; margin: 0.8em 0; border-radius: 0; background: var(--drf-white); }\n  .drf-rate h4 { margin-top: 0; color: var(--drf-grn); text-transform: none; letter-spacing: 0; font-size: 1.1em; font-family: 'Cormorant Garamond', Georgia, serif; font-weight: 500; border-bottom: 1px solid var(--drf-gold); padding-bottom: 0.5em; margin-bottom: 0.6em; }\n  .drf-rate-meta { font-size: 0.85em; color: var(--drf-muted); margin-bottom: 0.5em; }\n  .drf-rate-meta strong { color: var(--drf-gold); }\n  .drf-rate p { font-size: 0.92em; color: var(--drf-muted); margin-bottom: 0; }\n\n  \/* ── NUMBERED STEPS (square blocks) ── *\/\n  .drf-steps { counter-reset: drf-step; list-style: none; padding: 0; }\n  .drf-steps li { counter-increment: drf-step; padding: 0.8em 0 0.8em 3em; position: relative; border-bottom: 1px solid #eee; }\n  .drf-steps li::before { content: counter(drf-step); position: absolute; left: 0; top: 0.8em; width: 2em; height: 2em; border-radius: 0; background: var(--drf-grn); color: #fff; font-family: 'Cormorant Garamond', Georgia, serif; font-weight: 500; font-size: 0.95em; display: flex; align-items: center; justify-content: center; }\n  .drf-steps li:last-child { border-bottom: none; }\n\n  \/* ── USE-CASE LIST (1px alternating gold\/green) ── *\/\n  .drf-uses { list-style: none; padding: 0; }\n  .drf-uses li { padding: 0.6em 0; border-bottom: 1px solid var(--drf-gold); }\n  .drf-uses li:nth-child(even) { border-bottom-color: var(--drf-grn); }\n  .drf-uses li:last-child { border-bottom: none; }\n  .drf-uses li strong { color: var(--drf-grn); }\n\n  \/* ── COMPARISON BOXES (stacked) ── *\/\n  .drf-compare { margin: 1.2em 0; }\n  .drf-compare-box { border: 1px solid var(--drf-border); padding: 1em 1.2em; margin-bottom: 0.8em; border-radius: 0; background: var(--drf-white); }\n  .drf-compare-box h4 { margin-top: 0; color: var(--drf-grn); text-transform: none; letter-spacing: 0; font-size: 1.1em; font-family: 'Cormorant Garamond', Georgia, serif; font-weight: 500; border-bottom: 1px solid var(--drf-gold); padding-bottom: 0.4em; margin-bottom: 0.6em; }\n\n  \/* ── FAQ ACCORDIONS (square +\/- with 1px gold border) ── *\/\n  .drf-faq { border-bottom: 1px solid var(--drf-border); }\n  .drf-faq:last-child { border-bottom: none; }\n  .drf-faq input[type=\"checkbox\"] { display: none; }\n  .drf-faq-q { display: flex; justify-content: space-between; align-items: center; padding: 0.85em 0; cursor: pointer; font-weight: 500; color: var(--drf-grn); font-size: 0.98em; }\n  .drf-faq-q::after { content: '+'; font-size: 1.2em; font-weight: 300; color: var(--drf-gold); width: 1.5em; height: 1.5em; border-radius: 0; border: 1px solid var(--drf-gold); background: var(--drf-white); display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-left: 0.6em; }\n  .drf-faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; font-size: 0.92em; color: var(--drf-muted); line-height: 1.7; }\n  .drf-faq-a \u003e div { padding: 0 0 1em; }\n  .drf-faq input:checked ~ .drf-faq-q::after { content: '\\2212'; background: var(--drf-grn); border-color: var(--drf-grn); color: #fff; }\n  .drf-faq input:checked ~ .drf-faq-a { max-height: 800px; }\n\n  \/* ── REFERENCES ── *\/\n  .drf-refs { font-size: 0.78em; color: #8a8a8a; line-height: 1.5; margin-top: 1.5em; padding-top: 0.8em; border-top: 1px solid var(--drf-border); }\n  .drf-refs h4 { color: var(--drf-muted); }\n  .drf-refs ol { padding-left: 1.4em; margin: 0; }\n  .drf-refs li { margin-bottom: 0.3em; }\n\n  \/* ── TABLES ── *\/\n  .drf-wrap table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: 0.92em; }\n  .drf-wrap table th { background: var(--drf-grn); color: #fff; padding: 0.6em 0.8em; text-align: left; font-weight: 500; font-size: 0.8em; letter-spacing: 0.08em; text-transform: uppercase; }\n  .drf-wrap table td { padding: 0.55em 0.8em; border-bottom: 1px solid var(--drf-border); }\n  .drf-wrap table tr:nth-child(even) td { background: #f4f7f4; }\n\n  \/* ── SIGN-OFF ── *\/\n  .drf-signoff { font-family: 'Cormorant Garamond', Georgia, serif; font-style: italic; font-size: 1.05em; color: var(--drf-muted); margin-top: 1.4em; }\n\u003c\/style\u003e\n\u003cdiv class=\"drf-wrap\"\u003e\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n\u003cinput type=\"radio\" name=\"drf-cm-tabset\" id=\"drf-cm-tab1\" checked\u003e \u003cinput type=\"radio\" name=\"drf-cm-tabset\" id=\"drf-cm-tab2\"\u003e \u003cinput type=\"radio\" name=\"drf-cm-tabset\" id=\"drf-cm-tab3\"\u003e \u003cinput type=\"radio\" name=\"drf-cm-tabset\" id=\"drf-cm-tab4\"\u003e \u003cinput type=\"radio\" name=\"drf-cm-tabset\" id=\"drf-cm-tab5\"\u003e\n\u003cdiv class=\"drf-tab-labels\"\u003e\n\u003clabel for=\"drf-cm-tab1\"\u003eOverview\u003c\/label\u003e \u003clabel for=\"drf-cm-tab2\"\u003eIngredients\u003c\/label\u003e \u003clabel for=\"drf-cm-tab3\"\u003eHow to Use\u003c\/label\u003e \u003clabel for=\"drf-cm-tab4\"\u003eThe Science\u003c\/label\u003e \u003clabel for=\"drf-cm-tab5\"\u003eFAQ\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-panels\"\u003e\n\u003c!-- ═══════════ TAB 1: OVERVIEW ═══════════ --\u003e\n\u003cdiv class=\"drf-panel\" id=\"drf-cm-panel1\"\u003e\n\u003ch2\u003ecalcium, magnesium and sulphur in one pH-neutral feed\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDr Forest Cal-Mag is a pH-neutral calcium, magnesium and sulphur feed for plants\u003c\/strong\u003e, built on two naturally mined minerals — gypsum and kieserite — both permitted for use in organic growing. It supplies roughly 16% calcium, 4% magnesium and 18% sulphur in a balanced 4:1 calcium-to-magnesium ratio. Unlike garden lime, it raises calcium without lifting your soil pH, so you can correct a shortage without disturbing a pH you are happy with.\u003c\/p\u003e\n\u003cp\u003eIt is a small-batch blend handcrafted in Stockport, designed to sit alongside your Dr Forest fertilisers at 10% of the feed rate, so calcium and magnesium are never the nutrient that runs short. A trace of humic-stabilised boron — calcium's partner element — and a little fulvic acid round it out and help the plant take everything up.\u003c\/p\u003e\n\u003cdiv class=\"drf-badge-row\"\u003e\n\u003cspan class=\"drf-badge drf-badge-green\"\u003eFor Plants \u0026amp; Soil\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003epH Neutral\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003e~4:1 Ca to Mg\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003eMined Minerals\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003ePlant-Based, Peat-Free\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003eMade in Stockport\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout-dark\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eGarden use only — not a human supplement\u003c\/span\u003e\n\u003cp\u003eThis is a plant and soil product. It is not food-grade, not tested to supplement standards, and contains boron that is not intended for human consumption. If you are looking for a calcium-magnesium supplement to take yourself, this is not it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stats\"\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e~16%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCalcium\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e~4%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eMagnesium\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e~18%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eSulphur\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e~4:1\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCa : Mg Ratio\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhat gardeners use it for\u003c\/h3\u003e\n\u003cul class=\"drf-uses\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlongside Dr Forest fertilisers\u003c\/strong\u003e — add at 10% of your feed rate so calcium and magnesium keep pace with everything else the plant is being fed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlossom end rot\u003c\/strong\u003e — keeps calcium well supplied to developing tomatoes and chillies, the crops most prone to it. Best paired with steady, even watering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium deficiency\u003c\/strong\u003e — tip burn in lettuce, distorted or curling new growth on heavy-feeding plants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnesium deficiency\u003c\/strong\u003e — interveinal yellowing on the older, lower leaves while the veins stay green.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft-water gardens\u003c\/strong\u003e — rainwater and low-mineral tap water carry very little calcium or magnesium of their own.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage-feeding (veg \u0026amp; bloom)\u003c\/strong\u003e — calcium demand climbs as fruit and flowers set and cell walls are built.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy clay soil\u003c\/strong\u003e — gypsum helps flocculate tight clay, improving drainage and root penetration over time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThis cal-mag vs dosing two products separately\u003c\/h3\u003e\n\u003cdiv class=\"drf-compare\"\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eDr Forest cal-mag powder\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eOne powder: calcium, magnesium, sulphur, boron and fulvic acid, pre-balanced to ~4:1 Ca:Mg.\u003c\/li\u003e\n\u003cli\u003epH-neutral mined-mineral base; mix it into the soil, top-dress and water in, or apply as a stirred suspension.\u003c\/li\u003e\n\u003cli\u003eBoron held in a slow-release humic complex, so it does not wash straight through.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eWeighing gypsum and Epsom salt yourself\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTwo products to measure, and the ratio is easy to get wrong.\u003c\/li\u003e\n\u003cli\u003eEpsom salt is mostly water of crystallisation, so you carry less magnesium per gram.\u003c\/li\u003e\n\u003cli\u003eNo boron and no fulvic acid in the mix.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"drf-signoff\"\u003eHandcrafted in small batches in Stockport.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ TAB 2: INGREDIENTS ═══════════ --\u003e\n\u003cdiv class=\"drf-panel\" id=\"drf-cm-panel2\"\u003e\n\u003ch2\u003ewhat's in the blend\u003c\/h2\u003e\n\u003cp\u003eFour inputs, each doing one job. The two mined minerals carry the calcium, magnesium and sulphur; the boron and fulvic acid are small additions that make those nutrients work harder in the plant.\u003c\/p\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003eNaturally mined gypsum — 75%\u003c\/h4\u003e\n\u003cp\u003eCalcium sulphate dihydrate, roughly 23% calcium and 18% sulphur. A mined mineral permitted for use in organic growing, and the bulk of the calcium and sulphur in the blend. It dissolves to release calcium without raising soil pH, which is what sets it apart from lime.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\n\u003ch4\u003eMined kieserite — 25%\u003c\/h4\u003e\n\u003cp\u003eMagnesium sulphate monohydrate, roughly 16% magnesium and 22% sulphur. Another mined mineral permitted in organic growing. Because it holds far less water than Epsom salt (one water molecule rather than seven), it carries more magnesium per gram and stores without caking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\n\u003ch4\u003eHumic-stabilised boron — 4%\u003c\/h4\u003e\n\u003cp\u003eBoron fused into a humic-acid complex. Boron is the most easily leached of all the trace elements, so binding it to humic acid keeps it in the root zone and releases it slowly. It works as a calcium synergist — present at roughly 0.1% boron in the finished blend, a trace, deliberately kept small.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\n\u003ch4\u003eFulvic acid — 0.5%\u003c\/h4\u003e\n\u003cp\u003eA low-molecular-weight biostimulant that complexes calcium and magnesium and helps carry them into the roots and around the plant. A small inclusion that improves the uptake of everything else in the blend.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eGuaranteed analysis (approximate)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eNutrient\u003c\/th\u003e\n\u003cth\u003eElemental\u003c\/th\u003e\n\u003cth\u003eOxide form\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalcium (Ca)\u003c\/td\u003e\n\u003ctd\u003e~16%\u003c\/td\u003e\n\u003ctd\u003e~22% CaO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnesium (Mg)\u003c\/td\u003e\n\u003ctd\u003e~4%\u003c\/td\u003e\n\u003ctd\u003e~6.6% MgO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSulphur (S)\u003c\/td\u003e\n\u003ctd\u003e~18%\u003c\/td\u003e\n\u003ctd\u003e~45% SO₃\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoron (B)\u003c\/td\u003e\n\u003ctd\u003e~0.1% (trace)\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCa : Mg ratio\u003c\/td\u003e\n\u003ctd\u003e~4 : 1\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eValues are nominal, calculated from the mineral inputs. Confirm against the figures on your product label before quoting them as guaranteed.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ TAB 3: HOW TO USE ═══════════ --\u003e\n\u003cdiv class=\"drf-panel\" id=\"drf-cm-panel3\"\u003e\n\u003ch2\u003ehow to use Dr Forest cal-mag\u003c\/h2\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWater quality first\u003c\/span\u003e\n\u003cp\u003eUse rainwater or stand tap water for 24 hours where you can. The fulvic acid binds calcium and magnesium from hard tap water before it reaches the plant, so soft water gets the best out of the blend.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eApplying it with water\u003c\/span\u003e\n\u003cp\u003eIf you water it in, treat it as a suspension, not a clear solution. The calcium, magnesium and sulphur dissolve, but the boron is held in a humic form that does not — it settles to the bottom. So stir the powder into your water, leave it to stand about 30 minutes (the kieserite is slow to dissolve), then keep it moving and pour the whole lot onto the soil, sediment and all, so the boron goes down with it. Apply to the root zone only — never through a sprayer or a fine rose, which will clog and leave the boron behind.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eApplication rates\u003c\/h3\u003e\n\u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eA note on the dose\u003c\/span\u003e\n\u003cp\u003eThese rates look modest next to instant liquid feeds, but the whole dose reaches the roots: you pour the full suspension onto the soil, where the gypsum releases its calcium steadily rather than in one quick flush. Gram for gram it delivers more calcium than a typical bottled cal-mag — it just feeds the soil slowly, the way it should.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eWith Dr Forest fertilisers — the simple rule\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10% of your fertiliser dose  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e every feed\u003c\/div\u003e\n\u003cp\u003eWhatever you are feeding, add cal-mag at one tenth of that weight. Feeding 5 g of fertiliser? Add 0.5 g of cal-mag. Feeding 10 g? Add 1 g. Either top-dress it when you feed, or stir it into the same water and pour the lot onto the soil. This keeps calcium and magnesium in step with the rest of the feed without overdoing it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eTop-dressing established plants\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e ~30 g per m², or a level teaspoon (about 5 g) per established plant in a large pot  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e every 4–6 weeks in the growing season\u003c\/div\u003e\n\u003cp\u003eScatter over the surface, scratch lightly into the top centimetre and water in. Keep it light — it is a calcium and magnesium top-up, not the main feed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eMixing into a soil or potting mix\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e ~1–2 g per litre of potting compost, or ~50 g per m² forked into the top 10–15 cm of a bed  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e once, at planting or when mixing up\u003c\/div\u003e\n\u003cp\u003eBlends a season’s worth of calcium and magnesium evenly through the root zone. Useful in peat-free and coir-based mixes, which hold little calcium of their own, and for opening up heavy clay before planting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eWatering it in (used on its own)\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 1 g per litre routine, up to 2 g per litre for heavy feeders or poor soils  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e every 2–3 weeks\u003c\/div\u003e\n\u003cp\u003eFor gardeners not on a Dr Forest feed who want steady calcium and magnesium. Stir it into the can as a suspension, keep it moving and pour the whole lot — sediment included — over the root zone. Not for sprayers or fine roses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eCorrecting a visible deficiency\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 1–2 g per litre, watered in  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e repeat every 2–3 weeks until new growth recovers\u003c\/div\u003e\n\u003cp\u003eStir and pour the whole suspension over the root zone. Calcium is immobile in the plant, so it fixes new growth, not the leaves already damaged — and steady, repeated supply matters more than a single strong dose. Watch the fresh growth that follows to judge whether it has worked.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eSensitive crops — go lighter\u003c\/span\u003e\n\u003cp\u003eA few plants are sensitive to boron, which builds up slowly in the soil with repeated use. On these, halve the amount or apply half as often. The boron-sensitive group is beans and peas; strawberries and other soft and cane fruit (raspberries, blackberries, currants, gooseberries); top and stone fruit (apples, pears, cherries, plums, peaches); grapevines; and onions, garlic and leeks. Most other plants — including tomatoes, chillies and the bulk of vegetables — are fine at the standard rate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eStep by step\u003c\/h3\u003e\n\u003col class=\"drf-steps\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasure.\u003c\/strong\u003e Weigh the dose — 10% of your feed weight, or about 1 g per litre on its own.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisperse.\u003c\/strong\u003e If top-dressing, mix the powder through an equal volume of dry soil or mix first so it does not clump on the surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMix to a suspension.\u003c\/strong\u003e If watering it in, add to water and stir. The fulvic and kieserite dissolve (kieserite is slow — give it about 30 minutes), but the boron will not — it settles. Keep the can moving so the boron stays carried through.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApply to the soil.\u003c\/strong\u003e Pour the whole lot — sediment included — over the root zone, or top-dress it when you feed. Never through a sprayer or fine rose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater in.\u003c\/strong\u003e If you top-dressed, follow with plain water to carry it down to the roots.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"drf-callout-dark\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eDo not double the boron\u003c\/span\u003e\n\u003cp\u003eBoron is needed only in trace amounts and becomes toxic just above sufficiency — the gap between \"enough\" and \"too much\" is narrow. The 10% rate keeps boron comfortably in the safe band. \u003cstrong\u003eDo not stack this with a separate boron product, and do not exceed the rates above to \"make up\" for a deficiency.\u003c\/strong\u003e Pick the one method that suits your setup rather than layering several at once. With boron, more is not better.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with…\u003c\/span\u003e\n\u003cp\u003ePairs with the Dr Forest Veg 4-4-4 and Bloom feeds for stage-feeding (veg \u0026amp; bloom), where calcium demand rises through fruit and flower set. The Dr Forest Fulvic Acid Powder is the natural companion if you want to push uptake further in soft-water gardens.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eStorage\u003c\/span\u003e\n\u003cp\u003eKeep dry and sealed in the compostable pouch. Gypsum and kieserite both absorb moisture and will cake if left open. Store cool and dry, out of reach of children and pets. Kept dry, it lasts several years.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eFive common mistakes\u003c\/h3\u003e\n\u003cul class=\"drf-uses\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreating it like a fertiliser.\u003c\/strong\u003e It is a supplement to a feed, not a feed in its own right.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-dosing the boron.\u003c\/strong\u003e Stick to the 10% rule and do not layer boron products.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpecting it to repair old damage.\u003c\/strong\u003e Calcium is immobile — judge it by the new growth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUsing hard tap water.\u003c\/strong\u003e The fulvic underperforms; switch to rainwater where you can.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeaving the pouch open.\u003c\/strong\u003e It draws in moisture and clumps.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ TAB 4: THE SCIENCE ═══════════ --\u003e\n\u003cdiv class=\"drf-panel\" id=\"drf-cm-panel4\"\u003e\n\u003ch2\u003ethe science behind the blend\u003c\/h2\u003e\n\u003cp\u003eCalcium and magnesium are the two structural cations a plant draws on most heavily, and they compete for the same uptake sites at the root. Supply them badly out of balance and one suppresses the other. This blend pairs a pH-neutral calcium source with a soluble magnesium source at a sensible 4:1 ratio, then adds the two elements that make calcium work — boron and fulvic acid.\u003c\/p\u003e\n\u003cdiv class=\"drf-pullquote\"\u003eFeed the soil's calcium and magnesium together, in balance, and you stop either one becoming the limit.\u003c\/div\u003e\n\u003ch3\u003eHow it works\u003c\/h3\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003eCalcium and sulphur without a pH swing\u003c\/h4\u003e\n\u003cp\u003eGypsum (CaSO₄·2H₂O) dissolves to calcium and sulphate ions and is essentially pH-neutral. Unlike lime, it raises plant-available calcium without raising soil pH, which makes it the right calcium source where pH is already where you want it.\u003csup\u003e1\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\n\u003ch4\u003eFast magnesium from kieserite\u003c\/h4\u003e\n\u003cp\u003eMagnesium sulphate monohydrate dissolves to release Mg²⁺, the central atom of every chlorophyll molecule. Magnesium is the element most often overlooked in feeding programmes, yet it powers the sugar transport that fills fruit and flowers.\u003csup\u003e2\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\n\u003ch4\u003eA balanced 4:1, not a magic ratio\u003c\/h4\u003e\n\u003cp\u003eSevere cation imbalance causes antagonism at the root, but the old idea of a single \"ideal\" calcium-to-magnesium ratio is overstated — the real goal is sufficiency of each nutrient across a wide workable range. A 4:1 supply delivers plenty of both without one crowding out the other.\u003csup\u003e3\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\n\u003ch4\u003eBoron, calcium's partner\u003c\/h4\u003e\n\u003cp\u003eBoron governs the movement of calcium through the plant and cross-links the pectins that hold cell walls together. Deficiency shows first at the growing points and in poor fruit and seed set — the same places calcium problems appear, which is why the two are dosed together.\u003csup\u003e4\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\n\u003ch4\u003eHolding boron in place\u003c\/h4\u003e\n\u003cp\u003eBoron is the most leachable trace element and washes out of low-humus soils quickly. Fusing it into a humic complex keeps it in the root zone and releases it gradually, so a small, safe dose lasts rather than draining away after the first watering.\u003csup\u003e5\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\n\u003ch4\u003eFulvic acid as an uptake aid\u003c\/h4\u003e\n\u003cp\u003eLow-molecular-weight fulvic acid complexes mineral cations and acts as a biostimulant, improving the uptake and translocation of calcium and magnesium into and around the plant.\u003csup\u003e6\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e07\u003c\/span\u003e\n\u003ch4\u003eSulphur, the quiet third nutrient\u003c\/h4\u003e\n\u003cp\u003eBoth mined minerals are sulphate sources, so the blend also supplies sulphur — a secondary nutrient needed for protein and enzyme synthesis and increasingly short in modern soils.\u003csup\u003e7\u003c\/sup\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-refs\"\u003e\n\u003ch4\u003eScientific References\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eShainberg, I., Sumner, M.E., Miller, W.P., et al. (1989). Use of gypsum on soils: A review. \u003cem\u003eAdvances in Soil Science\u003c\/em\u003e, 9, 1–111.\u003c\/li\u003e\n\u003cli\u003eCakmak, I. \u0026amp; Yazici, A.M. (2010). Magnesium: A forgotten element in crop production. \u003cem\u003eBetter Crops with Plant Food\u003c\/em\u003e, 94(2), 23–25.\u003c\/li\u003e\n\u003cli\u003eKopittke, P.M. \u0026amp; Menzies, N.W. (2007). A review of the use of the basic cation saturation ratio and the \"ideal\" soil. \u003cem\u003eSoil Science Society of America Journal\u003c\/em\u003e, 71(2), 259–265.\u003c\/li\u003e\n\u003cli\u003eBrown, P.H., Bellaloui, N., Wimmer, M.A., et al. (2002). Boron in plant biology. \u003cem\u003ePlant Biology\u003c\/em\u003e, 4(2), 205–223.\u003c\/li\u003e\n\u003cli\u003eCanellas, L.P., Olivares, F.L., Aguiar, N.O., et al. (2015). Humic and fulvic acids as biostimulants in horticulture. \u003cem\u003eScientia Horticulturae\u003c\/em\u003e, 196, 15–27.\u003c\/li\u003e\n\u003cli\u003eMarschner, H. (2012). \u003cem\u003eMarschner's Mineral Nutrition of Higher Plants\u003c\/em\u003e, 3rd ed. Academic Press.\u003c\/li\u003e\n\u003cli\u003eHawkesford, M.J. \u0026amp; De Kok, L.J. (2006). Managing sulphur metabolism in plants. \u003cem\u003ePlant, Cell \u0026amp; Environment\u003c\/em\u003e, 29(3), 382–395.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ TAB 5: FAQ ═══════════ --\u003e\n\u003cdiv class=\"drf-panel\" id=\"drf-cm-panel5\"\u003e\n\u003ch2\u003ecal-mag for plants — your questions\u003c\/h2\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq1\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq1\"\u003eCan I take this as a cal-mag supplement?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eNo. This is a garden product for plants and soil. It is not food-grade, has not been tested to the heavy-metal and purity standards a human supplement must meet, and it contains boron that is not intended for people to ingest. For a calcium-magnesium supplement to take yourself, speak to a pharmacy — not this listing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq2\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq2\"\u003eWhat is Dr Forest cal-mag?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eA calcium, magnesium and sulphur feed for plants, built on naturally mined gypsum and kieserite, with a trace of boron and a little fulvic acid. It supplies roughly 16% calcium, 4% magnesium and 18% sulphur in a balanced 4:1 calcium-to-magnesium ratio. It is a supplement to your feeding programme, used to keep these structural nutrients from running short.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq3\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq3\"\u003eHow much do I use with my Dr Forest fertiliser?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eAdd it at 10% of your fertiliser dose, every feed. If you are feeding 5 g of fertiliser, add 0.5 g of cal-mag; for 10 g, add 1 g. Top-dress it when you feed, or stir it into the same water and pour the lot onto the soil. That keeps calcium and magnesium in step with the rest of the feed without overdoing it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq4\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq4\"\u003eDoes it prevent blossom end rot in tomatoes and chillies?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eIt is a strong tool for it. Blossom end rot is a calcium shortage at the fruit, and tomatoes and chillies are the crops most prone to it, so keeping calcium well supplied is a key part of preventing it. One honest caveat: blossom end rot is often less about how much calcium is in the soil and more about calcium reaching the fruit, which uneven or erratic watering disrupts. So feed cal-mag to keep the supply up, and water steadily and evenly alongside it — together they give you the best protection.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq5\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq5\"\u003eWill it change my soil pH?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eNo. Gypsum is calcium sulphate and is pH-neutral, so it adds calcium without lifting your soil pH. That is the main reason to choose it over garden lime or dolomite, which both raise pH.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq6\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq6\"\u003eHow is this different from garden lime?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eLime (calcium carbonate) raises calcium and soil pH at the same time, which is fine if your soil is acidic but a problem if it is not. This blend raises calcium with no pH shift, so you can correct a calcium shortage without disturbing a pH you are happy with.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq7\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq7\"\u003eWhy kieserite instead of Epsom salt?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eKieserite is the naturally mined monohydrate form of magnesium sulphate. It holds far less water than Epsom salt (one water molecule versus seven), so it carries more magnesium per gram, stores without caking, and is permitted for use in organic growing as a mined mineral.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq8\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq8\"\u003eDo I still need it if my fertiliser already has calcium?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eMost likely, yes. Dr Forest feeds carry some calcium and magnesium from minerals such as polyhalite, but the heavy biostimulant loading limits how much built-in calcium and magnesium there is room for. Adding cal-mag at 10% of the feed rate makes sure these two structural nutrients are never the limiting factor.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq9\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq9\"\u003eCan I apply too much boron?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eYes — boron is toxic to plants in excess, and its safe window is narrow. The boron in this blend is a deliberate trace (~0.1%) held in a slow-release humic complex, and the rates given keep it well within the safe band. The rule is simple: do not stack it with another boron product, and do not exceed the stated rates.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq10\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq10\"\u003eIs it a calcium or a magnesium deficiency I'm seeing?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eCalcium symptoms appear in new growth — distorted young leaves, blossom end rot in tomatoes and chillies, tip burn in lettuce. Magnesium symptoms appear in old growth — interveinal yellowing on the lower, older leaves while the veins stay green. Calcium is immobile, magnesium is mobile, which is why they show up at opposite ends of the plant.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq11\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq11\"\u003eCan I use it as a foliar spray?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eNo. It is a soil product, and it does not make a clean solution — the boron and some of the gypsum stay as fine sediment that would clog a sprayer or fine rose and leave the boron behind. Calcium is also immobile in the plant, so getting it to the roots is the reliable route. Apply it to the soil, not the leaves.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq12\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq12\"\u003eIs it organic?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eIt is built on mined minerals — gypsum and kieserite — that are permitted for use in organic growing, and it is made with organic-allowable inputs. It is not a certified organic product. If certification matters for your situation, check the inputs against your own scheme's rules, as boron is a restricted input under some organic standards.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq13\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq13\"\u003eDoes hard water matter?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eIt does for the fulvic acid. Hard tap water is already high in calcium and magnesium, which bind the fulvic before it can do its job. Use rainwater, or stand tap water for 24 hours, to get the best from the blend. The mineral feeding itself still works in hard water — it is only the fulvic that prefers soft.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq14\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq14\"\u003eWill it fully dissolve?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eNot fully, and it is not meant to. The calcium, magnesium and sulphur dissolve (the kieserite is slow, so give it about 30 minutes), but the boron is held in a humic form that does not dissolve — it settles to the bottom. If you water it in, treat it as a suspension: keep it stirred and pour the whole lot, sediment and all, over the soil so the boron goes down too. Or simply apply it dry and water in.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq15\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq15\"\u003eIs it safe around children, pets and bees?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eTreat it like any garden product: keep it out of reach of children and pets and do not ingest it. Used at the rates given, the mineral inputs are not a hazard to bees. It is a plant-based, peat-free soil and plant feed, not a pesticide.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cm-faq16\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cm-faq16\"\u003eWhere is it made?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eHandcrafted in small batches in Stockport, Greater Manchester, blended and packed by hand.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Dr Forest","offers":[{"title":"750g","offer_id":57869675954550,"sku":null,"price":10.49,"currency_code":"GBP","in_stock":true},{"title":"1.5kg","offer_id":40818694160571,"sku":null,"price":12.99,"currency_code":"GBP","in_stock":true},{"title":"3kg","offer_id":40818694193339,"sku":null,"price":22.49,"currency_code":"GBP","in_stock":true},{"title":"9kg","offer_id":44741035983035,"sku":null,"price":50.49,"currency_code":"GBP","in_stock":true},{"title":"18kg","offer_id":44741036048571,"sku":null,"price":80.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/powdered-cal-mag-supplement-boron-fulvic-acid-dr-forest-fertiliser-442.webp?v=1772228683"},{"product_id":"rock-phosphate-fertiliser-uk-31","title":"Rock Phosphate Fertiliser UK | 31% P · 46% Ca | Soft Micronised","description":"\u003c!-- Dr Forest — Micro Cal-Phos Product Page --\u003e\n\u003c!-- Prefix: drf-mp- (micro phos) --\u003e\n\u003c!-- Pure CSS radio-input tabs. 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font-size: 1em; font-family: 'Cormorant Garamond', serif; border-bottom: 1px solid var(--drf-border); padding-bottom: 0.5em; margin-bottom: 0.6em; }\n  .drf-rate-meta { font-size: 0.85em; color: #555; margin-bottom: 0.5em; } .drf-rate-meta strong { color: var(--drf-gold); }\n  .drf-rate p { font-size: 0.92em; color: #555; margin-bottom: 0; }\n  .drf-steps { counter-reset: drf-step; list-style: none; padding: 0; }\n  .drf-steps li { counter-increment: drf-step; padding: 0.8em 0 0.8em 3em; position: relative; border-bottom: 1px solid #eee; }\n  .drf-steps li::before { content: counter(drf-step); position: absolute; left: 0; top: 0.8em; width: 2em; height: 2em; border-radius: 50%; background: var(--drf-grn); color: #fff; font-family: 'Cormorant Garamond', serif; font-weight: 600; font-size: 0.9em; display: flex; align-items: center; justify-content: center; }\n  .drf-steps li:last-child { border-bottom: none; }\n  .drf-uses { list-style: none; padding: 0; } .drf-uses li { padding: 0.6em 0; border-bottom: 2px solid var(--drf-gold); } .drf-uses li:nth-child(even) { border-bottom-color: var(--drf-grn); } .drf-uses li:last-child { border-bottom: none; } .drf-uses li strong { color: var(--drf-grn); }\n  .drf-compare { margin: 1.2em 0; } .drf-compare-box { border: 1px solid var(--drf-border); padding: 1em 1.2em; margin-bottom: 0.8em; border-radius: 3px; background: var(--drf-grn-light); }\n  .drf-compare-box h4 { margin-top: 0; color: var(--drf-grn); text-transform: none; letter-spacing: 0; font-size: 1.05em; font-family: 'Cormorant Garamond', serif; border-bottom: 2px solid var(--drf-gold); padding-bottom: 0.4em; margin-bottom: 0.6em; }\n  .drf-faq { border-bottom: 1px solid var(--drf-border); } .drf-faq:last-child { border-bottom: none; } .drf-faq input[type=\"checkbox\"] { display: none; }\n  .drf-faq-q { display: flex; justify-content: space-between; align-items: center; padding: 0.8em 0; cursor: pointer; font-weight: 600; color: var(--drf-grn); font-size: 0.95em; }\n  .drf-faq-q::after { content: '+'; font-size: 1.3em; font-weight: 300; color: var(--drf-gold); width: 1.5em; height: 1.5em; border-radius: 50%; background: var(--drf-grn-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-left: 0.6em; }\n  .drf-faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; font-size: 0.92em; color: #555; line-height: 1.7; } .drf-faq-a \u003e div { padding: 0 0 1em; }\n  .drf-faq input:checked ~ .drf-faq-q::after { content: '−'; background: var(--drf-grn); color: #fff; } .drf-faq input:checked ~ .drf-faq-a { max-height: 600px; }\n  .drf-refs { font-size: 0.78em; color: #888; line-height: 1.5; margin-top: 1.5em; padding-top: 0.8em; border-top: 1px solid var(--drf-border); } .drf-refs ol { padding-left: 1.4em; margin: 0; } .drf-refs li { margin-bottom: 0.3em; }\n  .drf-sep { border: none; border-top: 2px solid var(--drf-gold); margin: 1.5em 0; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"drf-wrap\"\u003e\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-mp-tabset\" id=\"drf-mp-tab1\" checked\u003e\n  \u003cinput type=\"radio\" name=\"drf-mp-tabset\" id=\"drf-mp-tab2\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-mp-tabset\" id=\"drf-mp-tab3\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-mp-tabset\" id=\"drf-mp-tab4\"\u003e\n  \u003cdiv class=\"drf-tab-labels\"\u003e\n    \u003clabel for=\"drf-mp-tab1\"\u003eOverview\u003c\/label\u003e\n    \u003clabel for=\"drf-mp-tab2\"\u003eThe Science\u003c\/label\u003e\n    \u003clabel for=\"drf-mp-tab3\"\u003eHow to Use\u003c\/label\u003e\n    \u003clabel for=\"drf-mp-tab4\"\u003eFAQ\u003c\/label\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"drf-panels\"\u003e\n\n  \u003c!-- ═══════════════ TAB 1: OVERVIEW ═══════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-mp-panel1\"\u003e\n    \u003ch2\u003eOrganic Micro Cal-Phos — micronised rock phosphate with 31% phosphorus \u0026amp; 46% calcium. The bonemeal-free alternative.\u003c\/h2\u003e\n\n    \u003cdiv class=\"drf-badge-row\"\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e31% Total P₂O₅\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eUp to 20% Available P\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e46% Calcium (CaO)\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eMicronised Powder\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eBonemeal-Free\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eEU Organic CE-004003\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cp\u003ePhosphorus and calcium are the two minerals most closely tied to fundamental plant health. Phosphorus drives every energy-intensive process in the plant — root formation, cell division, flower initiation, fruit development, and the conversion of sunlight into sugars. Calcium is the structural mineral, responsible for cell wall rigidity, membrane integrity, and fruit firmness. Get these two right and almost everything else follows.\u003c\/p\u003e\n    \u003cp\u003eOrganic Micro Cal-Phos supplies both in a single concentrated mineral powder, sourced from natural stone quarries and micronised to solution grade — far finer than conventional rock phosphate. At \u003cstrong\u003e31% phosphorus (P₂O₅) and 46% calcium (CaO)\u003c\/strong\u003e, this is a high-analysis source of both nutrients in a naturally co-occurring, organically certified form. Critically, it is derived entirely from mineral rock — \u003cstrong\u003eno bonemeal, no slaughterhouse by-products\u003c\/strong\u003e. The same nutrients that bonemeal provides, from a completely plant-based and mineral source, in a more concentrated and faster-acting form.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-stats\"\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e31%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eTotal P₂O₅\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e20%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003ePlant-Available P₂O₅\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e46%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCalcium (CaO)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e0-31-0\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eNPK Profile\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3\u003eWhat to use it for\u003c\/h3\u003e\n    \u003cul class=\"drf-uses\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eTransplanting\u003c\/strong\u003e — worked into the planting hole or soil mix, it delivers phosphorus exactly where new roots will grow, giving transplants the energy to establish quickly with strong root systems\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFlowering and fruit set\u003c\/strong\u003e — phosphorus demand peaks at flower initiation and during fruit fill; applications in early bud stage support maximum fruit set and reduce flower drop\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eRoot crops\u003c\/strong\u003e — carrots, parsnips, beetroot, potatoes, and sweet potatoes respond strongly to phosphorus at sowing or planting, producing larger, denser roots with improved storage quality\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSeedling establishment\u003c\/strong\u003e — young seedlings have limited root systems and limited ability to access soil phosphorus; incorporating into seed compost gives seedlings the energy they need before roots are established\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCorrecting phosphorus deficiency\u003c\/strong\u003e — purple or reddish discolouration of leaf undersides and stems, delayed flowering, and poor fruit set are the most common visible indicators\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCalcium-deficient soils\u003c\/strong\u003e — 46% CaO makes this one of the highest-calcium mineral inputs available; useful where calcium supply is limiting fruit quality or contributing to physiological disorders\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSoil building\u003c\/strong\u003e — worked into new beds before planting, it builds long-term phosphorus and calcium reserves in a slow-release mineral form\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eThe bonemeal-free phosphorus solution\u003c\/h3\u003e\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eMicro Cal-Phos (This Product) — 100% Mineral\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eSource: natural stone quarry (mineral rock phosphate)\u003c\/li\u003e\n          \u003cli\u003eNo slaughterhouse by-products of any kind\u003c\/li\u003e\n          \u003cli\u003ePhosphorus: 31% P₂O₅ — high total analysis; up to 20% plant-available\u003c\/li\u003e\n          \u003cli\u003eCalcium: 46% CaO — simultaneously high\u003c\/li\u003e\n          \u003cli\u003eMicronised to solution grade for rapid availability\u003c\/li\u003e\n          \u003cli\u003eSuitable for vegans, vegetarians, and organic growers\u003c\/li\u003e\n          \u003cli\u003eNo BSE or animal disease transmission risk\u003c\/li\u003e\n          \u003cli\u003eConsistent analysis from mineral source\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eBonemeal — Slaughterhouse By-Product\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eSource: animal bones from slaughterhouse waste\u003c\/li\u003e\n          \u003cli\u003eIncompatible with plant-based growing philosophies\u003c\/li\u003e\n          \u003cli\u003ePhosphorus: typically 10–20% (lower analysis)\u003c\/li\u003e\n          \u003cli\u003eCalcium: typically 20–30%\u003c\/li\u003e\n          \u003cli\u003eCoarser particle size — slower to become available\u003c\/li\u003e\n          \u003cli\u003eNot suitable for vegan or plant-based growers\u003c\/li\u003e\n          \u003cli\u003eVariable analysis depending on animal source\u003c\/li\u003e\n          \u003cli\u003eRequires careful handling due to pathogen risk\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════════ TAB 2: THE SCIENCE ═══════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-mp-panel2\"\u003e\n    \u003ch2\u003eThe science of phosphorus \u0026amp; calcium — and why micronised rock phosphate outperforms conventional sources\u003c\/h2\u003e\n\n    \u003ch3\u003eSource and processing — EU Certified Organic CE-004003-2022\u003c\/h3\u003e\n    \u003cp\u003eOrganic Micro Cal-Phos is a natural limestone phosphate extracted from quarry by mechanical means only — crushing, classification, and sieving. No chemical treatment, no acid processing, no synthetic additives at any stage. This preserves the full mineral matrix exactly as it occurs in nature and is the basis for its EU organic certification under reference CE-004003-2022. The analysis is: Total P₂O₅ 29–31%, Calcium (CaO) 46%, with trace amounts of MgO (0.20%), K₂O (0.05%), and Fe₂O₃ — all naturally co-occurring in the mineral deposit.\u003c\/p\u003e\n\n    \u003ch3\u003eUnderstanding total vs plant-available phosphorus\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003eTotal P₂O₅ (31%)\u003c\/strong\u003e represents all the phosphorus present in the mineral, including fractions tightly bound in the crystal structure that will only become available over months to years through weathering, root exudate activity, and microbial organic acids. \u003cstrong\u003eP₂O₅ soluble in 2% formic acid (11.3–20%)\u003c\/strong\u003e is the EU standard test for plant-available phosphorus in organic fertilisers. Formic acid mimics the organic acids produced by plant roots and mycorrhizal fungi. This fraction — up to 20% of total P₂O₅ — is what becomes available during the growing season. It is substantially higher than conventional coarse rock phosphate (typically 3–7%) due to the micronised particle size increasing the reactive surface area.\u003c\/p\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003ePhosphorus — the energy currency of the plant\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePresent in ATP — the molecule that powers every metabolic reaction in all living cells\u003c\/li\u003e\n\u003cli\u003eDrives root development, cell division, flower formation, and seed and fruit filling\u003c\/li\u003e\n\u003cli\u003eForms the backbone of DNA and RNA\u003c\/li\u003e\n\u003cli\u003eStructural component of phospholipid cell membranes\u003c\/li\u003e\n\u003cli\u003eCentral role in activation of enzymes involved in sugar metabolism\u003c\/li\u003e\n\u003cli\u003eDeficiency produces: stunted growth, poor roots, delayed flowering, diminished yield\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eCalcium — the structural mineral\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCross-links pectin chains in the middle lamella — the glue between adjacent cells\u003c\/li\u003e\n\u003cli\u003eStabilises plasma membranes, governing which ions can pass in and out of cells\u003c\/li\u003e\n\u003cli\u003eEssential for root tip formation and extension\u003c\/li\u003e\n\u003cli\u003eActs as a second messenger in stress response and hormonal signalling pathways\u003c\/li\u003e\n\u003cli\u003eDeficiency produces: weak tissue, soft fruit, blossom end rot, tip burn, bitter pit\u003c\/li\u003e\n\u003cli\u003eCannot be remobilised from old tissue — must be continuously supplied to growing points\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003chr class=\"drf-sep\"\u003e\n\n    \u003ch3\u003eWhy micronised outperforms conventional rock phosphate\u003c\/h3\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eDramatically Increased Surface Area\u003c\/h4\u003e\n\u003cp\u003eConventional rock phosphate uses particles of 100–500 microns or larger. Micronisation to solution grade increases the reactive surface area exposed to soil water and root exudates by orders of magnitude. More surface area means faster dissolution, more phosphorus released in the first growing season, and higher plant-available P at any given application rate.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\u003ch4\u003eFirst-Season Phosphorus Availability\u003c\/h4\u003e\n\u003cp\u003eCoarse rock phosphate releases phosphorus over years, making it a long-term soil amendment but poorly suited to situations where phosphorus is needed promptly. Micronised rock phosphate provides measurably higher phosphorus uptake in the first growing season — at transplanting, during flowering, for seedlings, or to correct an active deficiency — while still building long-term mineral reserves.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\u003ch4\u003eLiquid Application Becomes Practical\u003c\/h4\u003e\n\u003cp\u003eThe solution-grade particle size makes it possible to disperse this powder in water and apply it as a soil drench — something not feasible with granular rock phosphate. Liquid application delivers phosphorus directly to the active root zone for rapid uptake, rather than relying on slow top-down dissolution from the soil surface.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\u003ch4\u003eCalcium \u0026amp; Phosphorus Co-Delivered\u003c\/h4\u003e\n\u003cp\u003eIn ionic solution, calcium and phosphate react spontaneously to form insoluble tricalcium phosphate — which is why liquid fertilisers cannot normally contain both at high concentrations. In a dry mineral powder, they co-exist stably because there is no aqueous medium to drive the reaction. Micro Cal-Phos preserves both nutrients at very high analysis in a single product, delivering them simultaneously to the root zone where soil microbes and root exudates convert both into plant-available forms.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-refs\"\u003e\n\u003ch4\u003eScientific References\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eVance, C.P., Uhde-Stone, C. \u0026amp; Allan, D.L. (2003). Phosphorus acquisition and use: critical adaptations by plants for securing a non-renewable resource. \u003cem\u003eNew Phytologist\u003c\/em\u003e, 157(3), 423–447.\u003c\/li\u003e\n\u003cli\u003eWhite, P.J. \u0026amp; Broadley, M.R. (2003). Calcium in plants. \u003cem\u003eAnnals of Botany\u003c\/em\u003e, 92(4), 487–511.\u003c\/li\u003e\n\u003cli\u003eHammond, J.P. et al. (2009). Regulatory responses of root morphology and gene expression to inadequate phosphorus. \u003cem\u003ePlant, Cell \u0026amp; Environment\u003c\/em\u003e, 32(5), 617–632.\u003c\/li\u003e\n\u003cli\u003eChien, S.H., Prochnow, L.I. \u0026amp; Cantarella, H. (2009). Recent developments of fertiliser production and use to improve nutrient efficiency and minimise environmental impacts. \u003cem\u003eAdvances in Agronomy\u003c\/em\u003e, 102, 267–322.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════════ TAB 3: HOW TO USE ═══════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-mp-panel3\"\u003e\n    \u003ch2\u003eHow to use Micro Cal-Phos — application rates, methods \u0026amp; timing guide\u003c\/h2\u003e\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003ePre-slurry before liquid application\u003c\/span\u003e\u003cp\u003eWhen using as a soil drench, mix the powder into a small amount of water first to form a smooth slurry, then add to the full application volume and stir well. This ensures even distribution of mineral particles. Stir or shake before each application pass to prevent settling — this is a suspension, not a solution.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003eApplication rates\u003c\/h3\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eSoil mix incorporation — before planting\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 1.5–3 ml per litre of soil (~1.8–3.6 g\/L)  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e At preparation\u003c\/div\u003e\n\u003cp\u003eMix evenly through soil or potting compost before planting. Use 1.5 ml\/L for already-fertile growing media or non-fruiting plants. Use 3 ml\/L for phosphorus-deficient compost, new media with no existing reserves, or heavy-feeding fruiting crops like tomatoes and peppers.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eOutdoor beds and borders\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 50–150 g per m²  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 6–12 weeks during growing season\u003c\/div\u003e\n\u003cp\u003eRake lightly into the soil surface or apply before rain. Use 50 g\/m² as a maintenance rate on established beds; up to 150 g\/m² when building fertility in new or depleted ground or correcting visible phosphorus deficiency.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eTop dressing — established containers\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.2–0.5 g per litre of soil volume  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 6–8 weeks\u003c\/div\u003e\n\u003cp\u003eApply to the soil surface around the base of plants and water in thoroughly. For a standard 10 L pot, this is approximately 1.5–4.5 g total. Water the plant first, apply the top dressing, then water again to carry the mineral down to the root zone.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLiquid soil drench\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 1–2 g per litre of water  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 3–4 weeks\u003c\/div\u003e\n\u003cp\u003ePre-slurry the measured powder in a small amount of warm water, then add to the full volume and stir thoroughly. Use 1 g\/L for routine maintenance; 2 g\/L for correcting active phosphorus or calcium deficiency. Apply to moist soil at the root zone — not to dry soil. Stir before each pass as particles will settle.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eTrees and shrubs\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 2–5 kg per tree  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Once annually in early spring\u003c\/div\u003e\n\u003cp\u003eApply around the drip line (outer edge of canopy), not tight against the trunk. Work lightly into the soil surface and water in well. For newly planted trees, incorporate 500 g–1 kg into the planting hole at planting time.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eTransplant boost\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 1–2 g mixed into the planting hole  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e At planting\u003c\/div\u003e\n\u003cp\u003eWork directly into the soil at root level before setting the plant. Delivers phosphorus exactly where new roots will grow first. Particularly effective for tomatoes, peppers, aubergines, courgettes, and all fruiting crops.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eMeasuring guide\u003c\/span\u003e\u003cp\u003eAt bulk density of 1.20 g\/cm³: 1 ml ≈ 1.2 g. A level teaspoon (5 ml) ≈ 6 g. A level tablespoon (15 ml) ≈ 18 g. For liquid applications, weighing on a digital scale gives the most accurate results.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eMycorrhizal caution\u003c\/span\u003e\u003cp\u003eHigh phosphorus availability suppresses mycorrhizal colonisation. If using alongside mycorrhizal fungi at transplanting, incorporate Micro Cal-Phos at the lower end of the range for the first 6–8 weeks, then resume normal rates once the fungal network is established. The two products are compatible and complementary over the full season — this caution applies only to the immediate post-inoculation window.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with…\u003c\/span\u003e\u003cp\u003e\u003cstrong\u003eMicronised Gypsum\u003c\/strong\u003e (additional calcium sulphate for intensive fruiting crops), \u003cstrong\u003eFulvic Acid Powder\u003c\/strong\u003e (chelates phosphate ions and improves their mobility in the root zone), \u003cstrong\u003eMycorrhizal Fungi\u003c\/strong\u003e (the fungal network is highly effective at accessing and delivering soil phosphorus — inoculate at planting and allow to establish before increasing P inputs), and \u003cstrong\u003eSulphate of Potash\u003c\/strong\u003e (potassium and phosphorus work synergistically during reproductive growth).\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════════ TAB 4: FAQ ═══════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-mp-panel4\"\u003e\n    \u003ch2\u003eFrequently asked questions about Micro Cal-Phos\u003c\/h2\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-mp-faq1\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-mp-faq1\"\u003eIs this a genuine alternative to bonemeal?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — and in terms of phosphorus and calcium analysis it is actually stronger than most bonemeal. Typical bonemeal contains 10–20% phosphorus and 20–30% calcium. Micro Cal-Phos delivers 31% phosphorus and 46% calcium (CaO) from a completely mineral, slaughterhouse-free source. In most UK garden soils with active biology, the availability from micronised rock phosphate is broadly comparable to bonemeal and in many situations faster — particularly when applied as a liquid drench or mixed into soil where root contact is immediate.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-mp-faq2\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-mp-faq2\"\u003eHow is this different from ordinary rock phosphate?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eThe raw material is the same — natural calcium phosphate mineral — but the particle size is very different. Standard rock phosphate is relatively coarsely ground (100–500 microns or larger) and dissolves very slowly, releasing phosphorus over years. Micro Cal-Phos is micronised to solution grade, dramatically increasing the surface area exposed to soil water, root exudates, and microbial organic acids. This means substantially faster phosphorus availability in the first growing season. The fine particle size also makes liquid application practical — which is not possible with coarser rock phosphate.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-mp-faq3\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-mp-faq3\"\u003eMy tomatoes have purple leaves — will this fix it?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003ePurple or reddish-purple discolouration on the undersides of tomato leaves is a classic sign of phosphorus deficiency. This commonly occurs in early spring when compost is cold and phosphorus is temporarily immobile. For fastest correction, mix 1–2 g per litre and apply as a root zone drench. Ensure the growing medium is warm and moist — phosphorus uptake is reduced dramatically below 10°C. If plants are cold as well as deficient, moving them somewhere warmer and applying the drench simultaneously is the most effective intervention. Colour should improve in new growth over 7–14 days.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-mp-faq4\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-mp-faq4\"\u003eCan I use this to prevent blossom end rot?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eMicro Cal-Phos at 46% CaO is an effective calcium source for soil application. However, blossom end rot is more commonly caused by inconsistent watering (which disrupts calcium transport via the xylem) than by a lack of calcium in the growing medium. For addressing active blossom end rot quickly, Micronised Gypsum (calcium sulphate) is more effective because it delivers calcium in a water-soluble form for rapid uptake. Micro Cal-Phos is best used as a longer-term soil builder and for maintaining calcium levels across the season, particularly when incorporated before planting.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-mp-faq5\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-mp-faq5\"\u003eWill adding phosphorus affect my mycorrhizal fungi?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eAt high availability, yes — phosphorus suppresses mycorrhizal colonisation because the plant's incentive to invest in the fungal partnership is reduced. However, at recommended Micro Cal-Phos rates, and given this is a slow-release mineral source rather than highly soluble synthetic phosphate, the risk of complete suppression is low. If inoculating with mycorrhizal fungi at transplanting, use the lower end of the range for the first 6–8 weeks. Mycorrhizal fungi are in fact one of the primary mechanisms by which mineral rock phosphate becomes plant-available, so establishing a strong network actually improves this product's efficiency.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-mp-faq6\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-mp-faq6\"\u003eCan I use this on acid-loving plants like blueberries?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eWith some caution. Calcium phosphate does not have the strong liming effect of carbonate forms of calcium — the pH impact on already-acidic soil is generally minimal at garden rates. However, blueberries thrive at pH 4.5–5.5 where phosphorus is naturally more available, and significant repeated applications of any calcium mineral could gradually shift pH upward. For ericaceous plants, use the lower end of the range applied infrequently. Liquid application at 1 g\/L as an occasional drench is safer than large incorporation rates.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-mp-faq7\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-mp-faq7\"\u003eIs this safe for edible crops?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes, completely. This is an EU organic-certified mineral fertiliser (CE-004003-2022) derived from natural stone quarry deposits. No synthetic additives, no industrial chemicals, no slaughterhouse-derived ingredients. Safe for all edible crops with no withholding period. Suitable for vegan and vegetarian growing practices and compatible with all certified organic production standards.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-mp-faq8\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-mp-faq8\"\u003eDoes this dissolve completely in water?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eNot fully — it is a mineral suspension rather than a true solution. The micronised particles disperse very finely in water but do not dissolve to a clear liquid like soluble fertiliser salts. The resulting suspension is opaque and particles will settle if left undisturbed. Stir or shake before each application pass. Pre-mix the powder in a small amount of water first to break up clumps, then add to the full volume. At 1–2 g per litre, the suspension is fine enough to apply through most watering cans and garden sprayers.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\n\u003chr class=\"drf-sep\"\u003e\n\u003ch3\u003eFrom our phosphorus range\u003c\/h3\u003e\n\u003cul\u003e\n      \u003cli\u003e\n\u003ca href=\"\/products\/organic-phosphorus-fertiliser-15\"\u003ePhosphorus Meal\u003c\/a\u003e — 15% P, calcined plant meal\u003c\/li\u003e\n      \u003cli\u003e\n\u003ca href=\"\/products\/liquid-suspension-fertiliser-micronised-calcium-phosphate\"\u003eLiquid Phosphate Fertiliser\u003c\/a\u003e — calcium phosphate suspension for foliar and drench\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Dr Forest","offers":[{"title":"500g","offer_id":44828087353531,"sku":null,"price":6.99,"currency_code":"GBP","in_stock":true},{"title":"1.5kg","offer_id":44826364412091,"sku":null,"price":14.0,"currency_code":"GBP","in_stock":true},{"title":"3kg","offer_id":44826364444859,"sku":null,"price":24.0,"currency_code":"GBP","in_stock":true},{"title":"9kg","offer_id":46265253691579,"sku":null,"price":56.49,"currency_code":"GBP","in_stock":true},{"title":"18kg","offer_id":46265255329979,"sku":null,"price":92.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/organic-micro-cal-phos-31-phosphorous-micronised-rock-phosphate-445.webp?v=1772229306"},{"product_id":"organic-calcium-carbonate","title":"Garden Calcium Carbonate | Lime Alternative","description":"\u003c!-- Dr Forest — Micro Cal-Carb Micronised Calcium Carbonate Product Page --\u003e\n\u003c!-- Prefix: cc --\u003e\n\u003cstyle\u003e\n  .drf-wrap *, .drf-wrap *::before, .drf-wrap *::after { box-sizing: border-box; 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height: 1.5em; border-radius: 50%; background: var(--drf-grn-light); display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-left: 0.6em; }\n  .drf-faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; font-size: 0.92em; color: #555; line-height: 1.7; }\n  .drf-faq-a \u003e div { padding: 0 0 1em; }\n  .drf-faq input:checked ~ .drf-faq-q::after { content: '−'; background: var(--drf-grn); color: #fff; }\n  .drf-faq input:checked ~ .drf-faq-a { max-height: 600px; }\n  .drf-refs { font-size: 0.78em; color: #888; line-height: 1.5; margin-top: 1.5em; padding-top: 0.8em; border-top: 1px solid var(--drf-border); }\n  .drf-refs ol { padding-left: 1.4em; margin: 0; }\n  .drf-refs li { margin-bottom: 0.3em; }\n  .drf-sep { border: none; border-top: 2px solid var(--drf-gold); margin: 1.5em 0; }\n  .drf-wrap table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: 0.92em; }\n  .drf-wrap table th { background: var(--drf-grn); color: #fff; font-weight: 600; padding: 0.6em 0.8em; text-align: left; font-size: 0.85em; letter-spacing: 0.04em; }\n  .drf-wrap table td { padding: 0.55em 0.8em; border-bottom: 1px solid var(--drf-border); }\n  .drf-wrap table tr:nth-child(even) td { background: var(--drf-grn-light); }\n\u003c\/style\u003e\n\n\u003cdiv class=\"drf-wrap\"\u003e\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-cc-tabset\" id=\"drf-cc-tab1\" checked\u003e\n  \u003cinput type=\"radio\" name=\"drf-cc-tabset\" id=\"drf-cc-tab2\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-cc-tabset\" id=\"drf-cc-tab3\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-cc-tabset\" id=\"drf-cc-tab4\"\u003e\n  \u003cdiv class=\"drf-tab-labels\"\u003e\n    \u003clabel for=\"drf-cc-tab1\"\u003eOverview\u003c\/label\u003e\n    \u003clabel for=\"drf-cc-tab2\"\u003eThe Science\u003c\/label\u003e\n    \u003clabel for=\"drf-cc-tab3\"\u003eHow to Use\u003c\/label\u003e\n    \u003clabel for=\"drf-cc-tab4\"\u003eFAQ\u003c\/label\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"drf-panels\"\u003e\n\n  \u003c!-- ═══════════ TAB 1 — OVERVIEW ═══════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-cc-panel1\"\u003e\n    \u003ch2\u003eMicro Cal-Carb — 96% pure micronised calcium carbonate from natural limestone\u003c\/h2\u003e\n    \u003cdiv class=\"drf-badge-row\"\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e54.1% CaO Calcium\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e96.2% CaCO₃ Purity\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eMicronised to 63µ\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003epH Corrector\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e91%+ Carbonic Solubility\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eEU Organic Compliant\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cp\u003eThe simplest and most concentrated calcium source available: \u003cstrong\u003e96.2% pure calcium carbonate\u003c\/strong\u003e from quarry-extracted natural limestone, mechanically crushed and micronised to 63 microns. No chemical processing, no additives, no fillers. At \u003cstrong\u003e54.1% CaO\u003c\/strong\u003e, this delivers more calcium per gram than gypsum (23% Ca), bone meal (~20% Ca), or any liquid calcium product on the market. The micronised particle size means it reacts rapidly in soil — far faster than agricultural lime — making it effective as both a calcium source and a fast-acting pH corrector for acidic soils.\u003c\/p\u003e\n    \u003cp\u003eThe \u003cstrong\u003ecarbonic solubility exceeds 91%\u003c\/strong\u003e — meaning over 91% of the calcium carbonate dissolves in the weak carbonic acid that naturally occurs in soil water. This is the measure that matters for plant availability: it tells you how much of the product will actually release calcium into the soil solution under normal growing conditions, not just in a laboratory acid bath.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-stats\"\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e54.1%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCaO Calcium\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e96.2%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCaCO₃ Purity\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e63µ\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eMicronised\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e\u0026gt;91%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCarbonic Solubility\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3\u003eFull mineral analysis\u003c\/h3\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eContent\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCalcium carbonate (CaCO₃)\u003c\/td\u003e\n\u003ctd\u003e96.20%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCalcium (CaO)\u003c\/td\u003e\n\u003ctd\u003e54.10%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSilica (SiO₂)\u003c\/td\u003e\n\u003ctd\u003e1.20%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eIron (Fe₂O₃)\u003c\/td\u003e\n\u003ctd\u003e0.71%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMagnesium (MgO)\u003c\/td\u003e\n\u003ctd\u003e0.48%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePotassium (K₂O)\u003c\/td\u003e\n\u003ctd\u003e0.05%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eManganese (MnO)\u003c\/td\u003e\n\u003ctd\u003e0.01%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSodium (Na₂O)\u003c\/td\u003e\n\u003ctd\u003e0.01%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n    \u003cp\u003e\u003cem\u003eNeutralising value: 54  |  Carbonic solubility: \u0026gt;91%  |  95% passes 63µ sieve  |  EU organic compliant\u003c\/em\u003e\u003c\/p\u003e\n\n    \u003ch3\u003eWhat Micro Cal-Carb is used for\u003c\/h3\u003e\n    \u003cul class=\"drf-uses\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eConcentrated calcium source\u003c\/strong\u003e — at 54.1% CaO, this is the highest-concentration calcium product in the Dr Forest range; ideal when soil tests show calcium deficiency or when large calcium additions are needed without adding other nutrients\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003epH correction for acidic soils\u003c\/strong\u003e — calcium carbonate neutralises soil acidity; the micronised particle size and 91%+ carbonic solubility mean it acts far faster than coarse agricultural lime, correcting pH within weeks rather than months\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFoliar and soil drench calcium\u003c\/strong\u003e — the 63µ micronised powder suspends in water for foliar spray or root drench application, delivering calcium directly where it is needed for cell wall construction\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSoil mix amendment\u003c\/strong\u003e — incorporate into potting mixes, composts, and growing media to buffer pH and provide slow-release calcium throughout the growing season\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMushroom cultivation\u003c\/strong\u003e — calcium carbonate is used in mushroom substrates as a pH buffer to maintain the alkaline conditions that favour mycelial growth while suppressing contaminant organisms\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFruit trees, orchards, vines, and ornamentals\u003c\/strong\u003e — suitable for all crops; particularly valuable where calcium demand is high (tomatoes, peppers, brassicas, apples) or where soil pH is below 6.0\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eWhy micronised limestone instead of agricultural lime?\u003c\/h3\u003e\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eMicronised Calcium Carbonate — Micro Cal-Carb\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003e96.2% CaCO₃ purity — minimal impurities\u003c\/li\u003e\n          \u003cli\u003eMicronised to 63µ — reacts rapidly in soil, effective within weeks\u003c\/li\u003e\n          \u003cli\u003e91%+ carbonic solubility — genuinely plant-available\u003c\/li\u003e\n          \u003cli\u003eFine enough to suspend in water for foliar spray or drench\u003c\/li\u003e\n          \u003cli\u003eCan be incorporated into soil mixes at precise rates\u003c\/li\u003e\n          \u003cli\u003eNo chemical processing — quarry-extracted and mechanically ground\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eStandard Agricultural Lime\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eCoarse particle size — takes 6–12 months to fully react\u003c\/li\u003e\n          \u003cli\u003eVariable purity — often 70–85% CaCO₃ with clay and silica fillers\u003c\/li\u003e\n          \u003cli\u003eCannot be suspended in water for liquid application\u003c\/li\u003e\n          \u003cli\u003eToo coarse for precise soil mix formulation\u003c\/li\u003e\n          \u003cli\u003eSlow pH correction — may take a full season to reach target\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eHandcrafted in Stockport\u003c\/span\u003e\u003cp\u003eEvery Dr Forest product is made by hand in small batches at our workshop in Stockport, Greater Manchester. We source ingredients for quality, not cost.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════ TAB 2 — THE SCIENCE ═══════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-cc-panel2\"\u003e\n    \u003ch2\u003eThe science of calcium carbonate: pH correction \u0026amp; calcium delivery\u003c\/h2\u003e\n    \u003ch3\u003eWhy particle size determines everything\u003c\/h3\u003e\n    \u003cp\u003eCalcium carbonate is the most common liming material in agriculture. But its effectiveness depends almost entirely on particle size. A coarse limestone chip can sit in soil for years without fully dissolving. The same mineral ground to 63 microns has an enormously greater surface area exposed to soil acids, root exudates, and microbial activity — accelerating dissolution from months to weeks. This is why micronised limestone acts as both a rapid pH corrector and a plant-available calcium source, while coarse ag-lime is essentially a long-term soil amendment with minimal short-term benefit.\u003c\/p\u003e\n    \u003chr class=\"drf-sep\"\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eThe Dissolution Chemistry\u003c\/h4\u003e\n\u003cp\u003eCalcium carbonate dissolves in acid: CaCO₃ + 2H⁺ → Ca²⁺ + H₂O + CO₂. In soil, the acid comes from three sources: carbonic acid (CO₂ dissolved in soil water), organic acids from root exudates, and organic acids from microbial metabolism. The reaction consumes hydrogen ions (H⁺) — which is precisely how it raises pH. Each molecule of CaCO₃ that dissolves removes two hydrogen ions from the soil solution and releases one calcium ion. The 91%+ carbonic solubility of this product confirms that over 91% of the CaCO₃ dissolves under these natural soil conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\u003ch4\u003eCalcium — Cell Walls, Signalling \u0026amp; Defence\u003c\/h4\u003e\n\u003cp\u003eCalcium cross-links pectin chains in cell walls, providing the structural rigidity that prevents fruit splitting, blossom end rot, tip burn, and bitter pit. It also functions as a secondary messenger in cell signalling — triggering defence responses to pathogen attack, regulating stomatal opening, and controlling pollen tube growth. Calcium is phloem-immobile: once deposited in a cell wall, it cannot be moved. Actively growing tissues need continuous external supply. Micronised CaCO₃ applied as a foliar spray or drench delivers calcium directly to where demand is highest.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\u003ch4\u003epH and Nutrient Availability\u003c\/h4\u003e\n\u003cp\u003eSoil pH governs the availability of almost every plant nutrient. Below pH 6.0, phosphorus becomes increasingly locked up with aluminium and iron. Molybdenum availability drops sharply. Aluminium and manganese can reach toxic levels. Calcium and magnesium leach faster than they are replaced. Raising pH from 5.5 to 6.5 with calcium carbonate doesn't just add calcium — it unlocks the phosphorus, molybdenum, and other nutrients that were already present in the soil but chemically unavailable. This is often the single most cost-effective intervention in acidic soil management.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\u003ch4\u003eSurface Area \u0026amp; Reaction Speed\u003c\/h4\u003e\n\u003cp\u003eA 1 cm limestone chip has approximately 6 cm² of surface area. The same mass ground to 63µ particles has a surface area measured in thousands of square centimetres. Chemical reactions happen at surfaces — the more surface exposed to soil acids, the faster the CaCO₃ dissolves and the faster pH rises. Standard agricultural lime (2–4 mm particles) may take 6–12 months to fully react. Micronised limestone at 63µ achieves measurable pH correction within 2–4 weeks under active growing conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\u003ch4\u003e96% Purity — Why It Matters\u003c\/h4\u003e\n\u003cp\u003eLower-grade liming materials contain 70–85% CaCO₃ with the balance being clay, silica, and other inert fillers. These fillers contribute no calcium, no pH correction, and no agronomic benefit — they are dead weight. At 96.2% CaCO₃, this product delivers 54.1% CaO per kilogram applied. You need less product per square metre to achieve the same result, and the dosing calculations are more precise because almost everything in the bag is active ingredient.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\u003ch4\u003eSoil Biology \u0026amp; Calcium Carbonate\u003c\/h4\u003e\n\u003cp\u003eMost beneficial soil bacteria and fungi prefer a pH of 6.0–7.0. In acidic soils (pH \u0026lt;5.5), bacterial activity declines sharply while pathogenic fungi — particularly Fusarium and Pythium — thrive in the absence of bacterial competition. Correcting soil pH with calcium carbonate shifts the microbial balance in favour of beneficial organisms. The calcium itself also improves soil structure by flocculating clay particles, improving aggregation, aeration, and water infiltration.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-refs\"\u003e\n\u003ch4\u003eScientific References\u003c\/h4\u003e\n\u003col\u003e\n      \u003cli\u003eMarschner, P. (2012). \u003cem\u003eMarschner's Mineral Nutrition of Higher Plants\u003c\/em\u003e. 3rd ed. Academic Press.\u003c\/li\u003e\n      \u003cli\u003eWhite, P.J. \u0026amp; Broadley, M.R. (2003). Calcium in plants. \u003cem\u003eAnnals of Botany\u003c\/em\u003e, 92(4), 487–511.\u003c\/li\u003e\n      \u003cli\u003eHolland, J.E. et al. (2018). Liming impacts on soils, crops and biodiversity in the UK. \u003cem\u003eSoil Use and Management\u003c\/em\u003e, 34, 504–519.\u003c\/li\u003e\n      \u003cli\u003eMengel, K. \u0026amp; Kirkby, E.A. (2001). \u003cem\u003ePrinciples of Plant Nutrition\u003c\/em\u003e. 5th ed. Kluwer Academic.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════ TAB 3 — HOW TO USE ═══════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-cc-panel3\"\u003e\n    \u003ch2\u003eHow to use Micro Cal-Carb: application rates \u0026amp; guide\u003c\/h2\u003e\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eRate depends on soil test results\u003c\/span\u003e\u003cp\u003eThe correct application rate for pH correction depends on your current soil pH, target pH, soil type (clay vs sand), and buffering capacity. The rates below are general guidelines. For precise liming, have your soil tested and calculate the requirement based on the neutralising value (54) and your soil's lime requirement figure.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003eApplication methods\u003c\/h3\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFoliar spray or soil drench\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5–1 g per litre of water  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e As required\u003c\/div\u003e\n\u003cp\u003eAdd the powder to water and stir vigorously. The micronised particles suspend readily at this concentration. Apply as a foliar spray or pour directly around the root zone. For foliar use, strain through a fine sieve before adding to a sprayer to prevent nozzle blockages. Delivers calcium directly to actively growing tissue.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFruit trees \u0026amp; established shrubs\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 kg per m²  |  \u003cstrong\u003eTiming:\u003c\/strong\u003e Late winter \/ early spring, or after harvest\u003c\/div\u003e\n\u003cp\u003eScatter evenly under the canopy from trunk to drip line. Lightly rake into the top few centimetres of soil and water in. The micronised particles begin reacting within days.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eOrchards\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.6 kg per m²  |  \u003cstrong\u003eTiming:\u003c\/strong\u003e Late autumn or early spring\u003c\/div\u003e\n\u003cp\u003eBroadcast over the root zone. Work into the soil surface where possible. The higher rate reflects the greater calcium demand of productive orchard trees and the need for ongoing pH management.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLawns \u0026amp; turf\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.4 kg per m²  |  \u003cstrong\u003eTiming:\u003c\/strong\u003e Autumn or early spring\u003c\/div\u003e\n\u003cp\u003eScatter evenly over the lawn surface. The fine powder settles into the turf canopy with watering or rain. Improves soil pH and calcium availability for root development and cold tolerance.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eSoil mixes \u0026amp; growing media\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eGuideline:\u003c\/strong\u003e 1–3 g per litre of compost or growing medium\u003c\/div\u003e\n\u003cp\u003eIncorporate thoroughly before planting. Buffers pH and provides slow-release calcium throughout the growing season. Start at the lower end for mixes that already contain lime; use the higher end for peat-based or coir-based media that tend to be acidic.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003eStep-by-step for liquid application\u003c\/h3\u003e\n    \u003col class=\"drf-steps\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMeasure the powder.\u003c\/strong\u003e 0.5–1 g per litre. A level ½ teaspoon is approximately 1–1.5 g depending on how tightly packed.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAdd to warm water and stir vigorously.\u003c\/strong\u003e The micronised particles suspend readily but will settle if left standing. Maintain agitation.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFor foliar use, strain first.\u003c\/strong\u003e Pour through a fine sieve or muslin into the sprayer. Apply as a fine mist to both leaf surfaces.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFor root drench, pour directly.\u003c\/strong\u003e Apply around the root zone using a watering can. No straining needed.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFor dry application, scatter and rake in.\u003c\/strong\u003e Spread evenly, work into the top 2–5 cm of soil, and water thoroughly.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with…\u003c\/span\u003e\u003cp\u003eUse alongside \u003cstrong\u003eDr Forest Cal-Mag Supplement\u003c\/strong\u003e for combined calcium and magnesium delivery with boron. Pair with \u003cstrong\u003eYorkshire Polyhalite\u003c\/strong\u003e for a complete secondary nutrient package (Ca, Mg, K, S). For liquid foliar calcium during fruiting, add \u003cstrong\u003eCal-Mino\u003c\/strong\u003e amino acid chelated calcium. \u003cstrong\u003eDo not mix with phosphate fertilisers in liquid form\u003c\/strong\u003e — calcium and phosphate precipitate when dissolved together.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════ TAB 4 — FAQ ═══════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-cc-panel4\"\u003e\n    \u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq1\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq1\"\u003eIs this the same as agricultural lime?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eSame mineral — calcium carbonate — but fundamentally different particle size and purity. Agricultural lime is typically 2–4 mm particles at 70–85% purity. This product is micronised to 63µ (95% passes a 63-micron sieve) at 96.2% purity. The finer particle size means it reacts in weeks rather than months. The higher purity means more calcium per gram applied.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq2\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq2\"\u003eHow is this different from gypsum?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eGypsum (calcium sulphate) provides calcium and sulphur but does \u003cstrong\u003enot\u003c\/strong\u003e raise soil pH — it is pH-neutral. Calcium carbonate provides calcium and \u003cstrong\u003edoes\u003c\/strong\u003e raise pH by neutralising soil acidity. Use gypsum when calcium is needed without pH change (e.g. in alkaline soils or to improve clay structure). Use Micro Cal-Carb when you need both calcium and pH correction.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq3\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq3\"\u003eWill it raise my soil pH too high?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eCalcium carbonate is self-limiting. It dissolves in acid conditions but becomes increasingly insoluble as pH rises above 7.0. It is very difficult to over-lime with CaCO₃ — the reaction slows and effectively stops as the soil approaches neutral pH. This is a safer liming material than quicklime (CaO) or hydrated lime (Ca(OH)₂), which can raise pH rapidly and excessively.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq4\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq4\"\u003eHow quickly does it work?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eThe micronised particle size (63µ) means the calcium carbonate begins dissolving within days of contact with moist soil. Measurable pH change typically occurs within 2–4 weeks under active growing conditions. Coarse agricultural lime may take 6–12 months to achieve the same result.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq5\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq5\"\u003eCan I use this as a foliar spray?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes. At 0.5–1 g per litre, the micronised powder suspends in water for foliar application. Strain through a fine sieve before adding to a sprayer. This delivers calcium directly to leaves and developing fruit — useful for preventing blossom end rot, tip burn, and bitter pit where root uptake is insufficient.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq6\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq6\"\u003eCan I mix it with other fertilisers?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eAs a dry amendment, yes — it mixes well with granular fertilisers and soil mixes. In liquid form, \u003cstrong\u003edo not mix with phosphate fertilisers\u003c\/strong\u003e — dissolved calcium and phosphate react to form insoluble calcium phosphate. Also avoid mixing with acidic liquid feeds, as the acid will react with the carbonate. Compatible with most granular and dry organic fertilisers.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq7\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq7\"\u003eIs this suitable for mushroom cultivation?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes. Calcium carbonate is widely used in mushroom substrates as a pH buffer. It maintains the alkaline conditions that favour mycelial growth while suppressing contaminant organisms. The micronised form mixes more uniformly through the substrate than coarser lime products.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq8\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq8\"\u003eHow much do I need for pH correction?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eThis depends on your current soil pH, target pH, soil type, and organic matter content. Clay soils and high-organic-matter soils require more lime to shift pH than sandy soils. As a starting point: 200–400 g\/m² will typically raise the pH of a light sandy soil by 0.5–1.0 units. For precise calculations, have your soil tested and use the neutralising value (54) to calculate the requirement.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cc-faq9\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cc-faq9\"\u003eIs this safe for all plants?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eCalcium carbonate is safe for all plants at recommended rates. However, acid-loving plants (blueberries, azaleas, rhododendrons, camellias) prefer a low pH and should not be limed. Do not apply to ericaceous or acid-loving species.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Dr Forest","offers":[{"title":"500g","offer_id":45735732838587,"sku":null,"price":7.0,"currency_code":"GBP","in_stock":true},{"title":"1.5kg","offer_id":45735732871355,"sku":null,"price":13.0,"currency_code":"GBP","in_stock":true},{"title":"3kg","offer_id":45735732904123,"sku":null,"price":20.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/organic-micro-cal-carb-micronised-calcium-carbonate-ph-8-fast-663.webp?v=1772229345"},{"product_id":"liquid-gypsum-micronised-calcium-sulphate","title":"Liquid Gypsum | Organic Calcium Fertiliser \u0026 Clay Soil Conditioner | For Tomatoes, Lawns \u0026 Heavy Clay | Dr Forest","description":"\u003c!-- Dr Forest — Micronised Gypsum Fertiliser Product Page --\u003e\u003c!-- Prefix: drf-gy- (gypsum) --\u003e\u003c!-- Embedded JSON-LD: Product + FAQPage (12 Q\u0026As) + HowTo (5 sections, 16 steps) at end of file --\u003e\u003c!-- SEO broadening 15 May 2026: H2 retargeted to liquid calcium fertiliser + clay soil conditioner + tomatoes + lawns + heavy clay; lead paragraph added; use-case bullets reordered to surface BER, lawn, clay, calcium fertiliser first --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Pure CSS radio-input tabs. 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margin-left: 0.6em; }\n  .drf-faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; font-size: 0.92em; color: #555; line-height: 1.7; }\n  .drf-faq-a \u003e div { padding: 0 0 1em; }\n  .drf-faq input:checked ~ .drf-faq-q::after { content: '−'; background: var(--drf-grn); color: #fff; }\n  .drf-faq input:checked ~ .drf-faq-a { max-height: 600px; }\n\n  .drf-refs { font-size: 0.78em; color: #888; line-height: 1.5; margin-top: 1.5em; padding-top: 0.8em; border-top: 1px solid var(--drf-border); }\n  .drf-refs ol { padding-left: 1.4em; margin: 0; }\n  .drf-refs li { margin-bottom: 0.3em; }\n  .drf-sep { border: none; border-top: 2px solid var(--drf-gold); margin: 1.5em 0; }\n\u003c\/style\u003e\n\u003cdiv class=\"drf-wrap\"\u003e\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n\u003cinput checked id=\"drf-gy-tab1\" name=\"drf-gy-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-gy-tab2\" name=\"drf-gy-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-gy-tab3\" name=\"drf-gy-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-gy-tab4\" name=\"drf-gy-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-gy-tab5\" name=\"drf-gy-tabset\" type=\"radio\"\u003e\n\u003cdiv class=\"drf-tab-labels\"\u003e\n\u003clabel for=\"drf-gy-tab1\"\u003eOverview\u003c\/label\u003e \u003clabel for=\"drf-gy-tab2\"\u003eOrganic vs Synthetic\u003c\/label\u003e \u003clabel for=\"drf-gy-tab3\"\u003eHow to Use\u003c\/label\u003e \u003clabel for=\"drf-gy-tab4\"\u003eThe Science\u003c\/label\u003e \u003clabel for=\"drf-gy-tab5\"\u003eFAQ\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-panels\"\u003e\n\u003c!-- ═══════════════════════════════════════════════════ --\u003e \u003c!-- TAB 1 — OVERVIEW                                    --\u003e \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n\u003cdiv id=\"drf-gy-panel1\" class=\"drf-panel\"\u003e\n\u003ch2\u003eLiquid Gypsum — Organic Calcium Fertiliser, Clay Soil Conditioner \u0026amp; Lawn Feed\u003c\/h2\u003e\n\u003cdiv class=\"drf-badge-row\"\u003e\n\u003cspan class=\"drf-badge drf-badge-green\"\u003e19.55% Calcium\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003e15.31% Sulphur\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003e5 Micron Particles\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003eContains Fulvic Acid\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-gold\"\u003eOrganic Approved\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-gold\"\u003eThick Mineral Suspension\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eLiquid gypsum\u003c\/strong\u003e is the most versatile single bottle in a UK gardener's chemistry. One product does four jobs that usually need four: it is a fast-acting \u003cstrong\u003eorganic calcium fertiliser\u003c\/strong\u003e for tomatoes, peppers and apples prone to blossom end rot and bitter pit; a \u003cstrong\u003eliquid gypsum clay breaker\u003c\/strong\u003e that loosens heavy clay soils without surface disturbance; a \u003cstrong\u003elawn feed\u003c\/strong\u003e that strengthens turf cell walls and improves drainage beneath established grass; and a general source of \u003cstrong\u003eplant-available calcium and sulphur\u003c\/strong\u003e for any fruiting crop, leafy vegetable, perennial border or container plant. The only liquid product on a typical garden shelf that can improve heavy clay \u003cem\u003eunder\u003c\/em\u003e a lawn or border without digging it in.\u003c\/p\u003e\n\u003cp\u003eThis is a \u003cstrong\u003ethick, creamy mineral suspension\u003c\/strong\u003e — not a thin liquid, not a manufactured solution. It is made by wet-milling natural gypsum (calcium sulphate) down to an average particle size of just \u003cstrong\u003e5 microns\u003c\/strong\u003e and suspending those micronised mineral particles in water with \u003cstrong\u003efulvic acid\u003c\/strong\u003e. When you open the bottle, the product is dense, opaque, and settles on standing — because it is real, physical mineral held in suspension. At this particle size, 25 litres of product delivers the same immediately available calcium as \u003cstrong\u003eone tonne of conventional granular gypsum\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis is the \u003cstrong\u003eorganic version\u003c\/strong\u003e of liquid gypsum — ACO Organic Certified, made from naturally mined calcium sulphate with fulvic acid. No industrial byproduct gypsum, no synthetic dispersants, no manufactured chemical inputs. The fulvic acid enhances calcium uptake through root cell membranes and keeps calcium ions mobile in the soil solution. Not all liquid gypsum is the same — for the difference between organic mineral gypsum and synthetic manufactured liquid gypsum, see the \u003cstrong\u003eOrganic vs Synthetic\u003c\/strong\u003e tab.\u003c\/p\u003e\n\u003cdiv class=\"drf-stats\"\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e19.55%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCalcium (Ca)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e15.31%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eSulphur (S)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e5μm\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eParticle Size\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e1 tonne\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eEquiv. per 25L\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhat is liquid gypsum used for in the UK garden?\u003c\/h3\u003e\n\u003cul class=\"drf-uses\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlossom end rot prevention \u0026amp; treatment in tomatoes, peppers, courgettes \u0026amp; aubergines\u003c\/strong\u003e — the most responsive treatment for BER; calcium sulphate applied to the root zone begins correcting the calcium delivery failure in expanding fruit within days. Most effective when applied prophylactically from transplant or first flower\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid gypsum for lawns — calcium \u0026amp; sulphur feed plus clay improvement under turf\u003c\/strong\u003e — calcium strengthens grass cell walls for wear tolerance and disease resistance; sulphur supports deeper green colour and protein synthesis; sulphate beneath the surface improves clay structure without digging or lifting the turf. Apply monthly through the growing season, or fortnightly when treating clay\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid gypsum for clay soil — clay breaker \u0026amp; drainage improvement on heavy clay\u003c\/strong\u003e — sulphate displaces sodium and magnesium from clay particles, allowing them to aggregate into a better structure with improved drainage, aeration and root penetration. The only chemical clay breaker that works without altering soil pH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrganic calcium fertiliser for fruiting crops \u0026amp; container plants\u003c\/strong\u003e — supplies plant-available calcium to any high-demand fruiting crop (apples, pears, strawberries, cucumbers, courgettes), perennial border, rose bed or container without raising soil pH the way lime does. The everyday calcium source for gardeners on already-neutral soils\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBitter pit in apples \u0026amp; pears\u003c\/strong\u003e — calcium deficiency in stored apple fruit is directly corrected by regular liquid gypsum applications from fruit set onwards; improves both fresh eating quality and storage life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip-burn in leafy crops — lettuce, cabbage, kale\u003c\/strong\u003e — tip-burn is a calcium delivery failure in fast-growing leafy crops; root drenches maintain the constant calcium supply they need\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSulphur supply for sulphur-deficient UK soils\u003c\/strong\u003e — the fourth major crop nutrient, frequently deficient since atmospheric sulphur deposition declined in the 1990s; liquid gypsum delivers immediately available sulphate-sulphur\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell wall construction in fruiting crops\u003c\/strong\u003e — calcium is a structural component of every new plant cell wall; fruiting crops have extremely high calcium demands during fruit set and fill\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoliar calcium spray for rapid correction\u003c\/strong\u003e — the micronised suspension can be applied as a foliar spray for rapid calcium delivery directly through the leaf surface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCalcium fertiliser comparison — liquid gypsum vs lime, which one is right for your soil?\u003c\/h3\u003e\n\u003cdiv class=\"drf-compare\"\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eLiquid Gypsum (Calcium Sulphate)\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDelivers calcium without meaningfully altering soil pH — suitable for neutral and alkaline soils\u003c\/li\u003e\n\u003cli\u003eSupplies sulphate-sulphur simultaneously — addresses the UK's widespread sulphur deficit\u003c\/li\u003e\n\u003cli\u003eSulphate displaces sodium from clay exchange sites — actively improves soil structure\u003c\/li\u003e\n\u003cli\u003eMicronised to 5 microns — immediately available in the root zone within hours\u003c\/li\u003e\n\u003cli\u003eCombined with fulvic acid for enhanced calcium uptake\u003c\/li\u003e\n\u003cli\u003eACO Organic Certified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eAgricultural Lime (Calcium Carbonate)\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSignificantly raises soil pH — useful only where acidity needs correcting\u003c\/li\u003e\n\u003cli\u003eDoes not supply sulphur\u003c\/li\u003e\n\u003cli\u003eNo sodium displacement — does not improve clay structure\u003c\/li\u003e\n\u003cli\u003eReacts slowly; calcium release takes months to years\u003c\/li\u003e\n\u003cli\u003eCan raise pH above optimal range on already-neutral soils\u003c\/li\u003e\n\u003cli\u003eThe correct choice when both acidity and calcium deficiency need addressing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eImportant — what liquid gypsum cannot fix\u003c\/span\u003e\n\u003cp\u003eLiquid gypsum corrects \u003cstrong\u003echemically dispersed clay\u003c\/strong\u003e — where sodium or magnesium has displaced calcium on clay exchange sites, causing particles to collapse into an impermeable layer. It does \u003cem\u003enot\u003c\/em\u003e fix drainage problems caused by \u003cstrong\u003emechanical compaction\u003c\/strong\u003e (foot traffic, machinery, building work) or by a \u003cstrong\u003elack of physical drainage\u003c\/strong\u003e (high water table, impermeable subsoil pan, missing land drains, poor site grading). If water sits on your soil because it has nowhere to drain \u003cem\u003eto\u003c\/em\u003e, no liquid product will resolve that — you need physical drainage infrastructure. See the How to Use tab for diagnostic tests.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════════════════════════════════════════════ --\u003e \u003c!-- TAB 2 — ORGANIC VS SYNTHETIC                       --\u003e \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n\u003cdiv id=\"drf-gy-panel2\" class=\"drf-panel\"\u003e\n\u003ch2\u003eOrganic vs synthetic liquid gypsum — what is actually in the bottle?\u003c\/h2\u003e\n\u003cp\u003eNot all liquid gypsum is the same. The words \"liquid gypsum\" on a label tell you the product contains calcium sulphate in liquid form — but they tell you nothing about where that calcium sulphate came from, how it was processed, what else is in the bottle, or whether it is suitable for organic growing. There are two fundamentally different types of liquid gypsum on the market, and the distinction matters.\u003c\/p\u003e\n\u003ch3\u003eTwo types of liquid gypsum — what is actually in the bottle\u003c\/h3\u003e\n\u003cdiv class=\"drf-compare\"\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eOrganic Micronised Gypsum (This Product)\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGypsum source:\u003c\/strong\u003e Naturally mined mineral calcium sulphate — quarried from geological deposits of natural gypsum rock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow it is made:\u003c\/strong\u003e The natural gypsum is wet-milled (micronised) to an average particle size of 5 microns and suspended in water with fulvic acid — no chemical processing, no synthetic additives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhysical form:\u003c\/strong\u003e Thick, creamy, opaque suspension that settles on standing — because it contains real mineral particles held in liquid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditives:\u003c\/strong\u003e Fulvic acid — a naturally occurring humic substance that chelates calcium and supports soil biology\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Natural geological gypsum — no industrial contaminants, no heavy metal residues, no fluoride\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrganic status:\u003c\/strong\u003e ACO Organic Certified — permitted in organic production\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoil biology:\u003c\/strong\u003e Fulvic acid actively supports microbial communities; no synthetic surfactants or dispersants\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eSynthetic Manufactured Liquid Gypsum\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGypsum source:\u003c\/strong\u003e Industrial byproduct calcium sulphate — typically from flue gas desulphurisation (FGD gypsum from coal power stations) or phosphoric acid manufacture (phosphogypsum from fertiliser factories)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow it is made:\u003c\/strong\u003e The industrial byproduct gypsum is dissolved or dispersed using synthetic surfactants, chemical dispersants, and stabilisers to create a pourable liquid product\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhysical form:\u003c\/strong\u003e Often thinner and more uniform than mineral suspensions — synthetic dispersants prevent the natural settling that occurs in genuine micronised mineral products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditives:\u003c\/strong\u003e Synthetic surfactants, chemical dispersants, stabilisers, and sometimes polyacrylamide or other manufactured polymers to maintain suspension stability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurity:\u003c\/strong\u003e Industrial byproduct gypsum can contain trace contaminants depending on the source process — phosphogypsum may contain fluoride and heavy metal residues; FGD gypsum may contain trace mercury and other flue gas contaminants\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrganic status:\u003c\/strong\u003e Not certified for organic production — synthetic dispersants and industrial byproduct sourcing disqualify it\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoil biology:\u003c\/strong\u003e Synthetic surfactants and dispersants can disrupt soil microbial communities and earthworm activity with repeated use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eHead-to-head comparison\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eOrganic Micronised Gypsum\u003c\/th\u003e\n\u003cth\u003eSynthetic Liquid Gypsum\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGypsum source\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNaturally mined mineral gypsum\u003c\/td\u003e\n\u003ctd\u003eIndustrial byproduct (FGD or phosphogypsum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProcessing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMechanical micronisation only — no chemical processing\u003c\/td\u003e\n\u003ctd\u003eChemical dissolution with synthetic dispersants and surfactants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParticle size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 microns average — extremely high surface area for fast dissolution\u003c\/td\u003e\n\u003ctd\u003eVariable — often coarser or chemically dissolved rather than micronised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFulvic acid\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIncluded — chelates calcium for enhanced root uptake\u003c\/td\u003e\n\u003ctd\u003eNot included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSynthetic additives\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003eSurfactants, dispersants, stabilisers, sometimes polyacrylamide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContaminant risk\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone — natural geological mineral\u003c\/td\u003e\n\u003ctd\u003ePossible trace heavy metals, fluoride depending on industrial source\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrganic approved\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes — ACO Certified\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSoil biology impact\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePositive — fulvic acid feeds beneficial microbes\u003c\/td\u003e\n\u003ctd\u003ePotentially negative — synthetic surfactants can disrupt soil life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCalcium \u0026amp; sulphur\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e19.55% Ca, 15.31% S\u003c\/td\u003e\n\u003ctd\u003eVariable — depends on manufacturing process and dilution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eResidual benefit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMineral particles continue dissolving over days after application\u003c\/td\u003e\n\u003ctd\u003eOften pre-dissolved — one-time delivery, gone with the next watering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhere synthetic liquid gypsum comes from\u003c\/h3\u003e\n\u003cp\u003eMost manufactured liquid gypsum is made from \u003cstrong\u003eindustrial byproduct gypsum\u003c\/strong\u003e — calcium sulphate produced as a waste product from other industrial processes, not mined from the ground. The two most common sources are:\u003c\/p\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003eFGD Gypsum (Flue Gas Desulphurisation)\u003c\/h4\u003e\n\u003cp\u003eProduced in coal-fired power stations when sulphur dioxide is scrubbed from the exhaust gas using limestone. The resulting calcium sulphate is a synthetic byproduct, not a natural mineral. While chemically similar to natural gypsum, FGD gypsum can contain trace mercury, selenium, and other flue gas contaminants depending on the coal source and scrubbing efficiency.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\n\u003ch4\u003ePhosphogypsum\u003c\/h4\u003e\n\u003cp\u003eProduced during the manufacture of phosphoric acid from phosphate rock. Phosphogypsum can contain elevated levels of fluoride, cadmium, and naturally occurring radioactive materials (radium-226) from the phosphate ore. Its use in agriculture is restricted or banned in several countries for this reason. Phosphogypsum is significantly cheaper than natural mined gypsum, which is why it is used in manufactured liquid gypsum products where cost is the primary consideration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhy the additives matter\u003c\/h3\u003e\n\u003cp\u003eSynthetic liquid gypsum requires chemical dispersants and surfactants to stay in suspension and pour smoothly. These are industrial chemicals designed to prevent particle settling — they are not there for the benefit of your soil or plants. In an organic micronised gypsum, the product settles naturally because it is real mineral in water with no synthetic stabilisers. You shake it before use, and that is the trade-off for a clean, additive-free product. The fulvic acid in this product is not a dispersant — it is a naturally occurring humic substance included specifically because it chelates calcium for faster plant uptake and supports beneficial soil biology.\u003c\/p\u003e\n\u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eHow to tell what you are buying\u003c\/span\u003e\n\u003cp\u003eCheck the label for the gypsum source. If it does not state \"natural gypsum\" or \"mined gypsum\", the calcium sulphate is likely an industrial byproduct. If the ingredient list includes surfactants, dispersants, polyacrylamide, or other synthetic additives, the product is manufactured rather than organic. If the liquid does not settle or separate on standing, it almost certainly contains synthetic dispersants — a genuine mineral suspension will always settle. If it is not certified organic, it is not organic. This product is ACO Organic Certified, made from naturally mined gypsum, and the only additive is fulvic acid.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eBoth deliver calcium sulphate — so why does the source matter?\u003c\/span\u003e\n\u003cp\u003eBecause you are applying this product to soil you are growing food in, or to a lawn your children and pets use. The calcium sulphate itself is the same molecule regardless of source — but what comes \u003cem\u003ewith\u003c\/em\u003e it is not. Natural mined gypsum is a clean geological mineral with no industrial process residues. Byproduct gypsum carries whatever contaminants were present in the industrial process it came from. And the synthetic surfactants required to keep manufactured liquid gypsum in suspension are additional chemicals being applied to your soil with every treatment. For gardeners building long-term soil health, the source and the additives matter as much as the active ingredient.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════════════════════════════════════════════ --\u003e \u003c!-- TAB 3 — HOW TO USE                                  --\u003e \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n\u003cdiv id=\"drf-gy-panel3\" class=\"drf-panel\"\u003e\n\u003ch2\u003eHow to apply liquid gypsum — preparation, application rates \u0026amp; UK garden guide\u003c\/h2\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eShake well before every use\u003c\/span\u003e\n\u003cp\u003eThis is a thick mineral suspension, not a clear solution — the micronised gypsum particles settle on standing. Shake or stir vigorously for at least 30 seconds before measuring. If the bottle has been sitting for an extended period, invert and shake several times before use. The thick, creamy consistency when shaken is normal — it is what genuine micronised mineral looks like in liquid form. Do not store in a pre-diluted form — always dilute fresh for each application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eApplication rates\u003c\/h3\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eRoot drench — general maintenance\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 1 tsp (5 ml) per litre | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 2–4 weeks\u003c\/div\u003e\n\u003cp\u003eStandard rate for all plants during the growing season. Apply around the root zone, not over the crown. Water in well after application. Compatible with all Dr Forest fertilisers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eRoot drench — active deficiency or high demand\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 2 tsp (10 ml) per litre | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Weekly until resolved, then fortnightly\u003c\/div\u003e\n\u003cp\u003eUse when blossom end rot, bitter pit, or tip-burn is already occurring, or for calcium-hungry crops such as tomatoes, peppers, and apples during rapid fruit fill. Return to the standard rate once symptoms subside.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFoliar spray — rapid correction\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 5 ml per litre | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Weekly during fruit set and fill\u003c\/div\u003e\n\u003cp\u003eDelivers calcium directly through the leaf and fruit surface for the fastest possible correction of deficiency symptoms. Apply in early morning or evening. Avoid full sun — the suspension may leave a white residue at higher rates. Filter through 200 micron mesh before use in fine spray nozzles.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eLawn \u0026amp; turf applications\u003c\/h3\u003e\n\u003cp\u003eLiquid gypsum is one of the most useful products for lawn care — it delivers calcium and sulphur directly into the root zone of established turf without any digging, disruption, or pH change. For professional lawn care and domestic gardeners managing lawns on clay, compacted, or sodium-affected soils, it is a core maintenance input.\u003c\/p\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLawn — general maintenance\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10 ml per litre at 1 L\/m² | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Monthly during the growing season (March–October)\u003c\/div\u003e\n\u003cp\u003eStandard lawn rate for ongoing calcium and sulphur supply. Apply with a watering can fitted with a rose, or through a knapsack sprayer. Water in lightly after application. Supports cell wall strength in grass plants, improving wear tolerance, disease resistance, and recovery from foot traffic. The sulphur deepens green colour and supports protein synthesis in the leaf.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLawn — clay soil improvement\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 15 ml per litre at 1 L\/m² | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 2 weeks for the first 3 months, then monthly\u003c\/div\u003e\n\u003cp\u003eHigher rate for lawns on heavy clay that drains poorly, puddles after rain, or becomes waterlogged in winter. The sulphate displaces sodium from the clay beneath the turf, gradually improving drainage and aeration without disturbing the lawn surface. This is the only effective way to chemically treat clay under an established lawn — you cannot dig in amendments without destroying the turf. For best results, combine with hollow-tine aeration in autumn to physically open channels into the clay layer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLawn — after aeration or scarifying\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10–15 ml per litre at 1 L\/m² | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Immediately after aeration, then monthly\u003c\/div\u003e\n\u003cp\u003eApply immediately after hollow-tine aeration, slit aeration, or scarifying. The open channels and exposed soil allow the liquid gypsum to penetrate directly into the clay layer beneath the turf — dramatically increasing the depth and speed of treatment compared to surface application alone. This is the single most effective timing for clay treatment under lawns.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLawn — new turf or overseeding\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10 ml per litre at 1 L\/m² | \u003cstrong\u003eFrequency:\u003c\/strong\u003e At laying\/sowing, then fortnightly for 6 weeks\u003c\/div\u003e\n\u003cp\u003eCalcium supports strong cell wall construction in new grass plants, improving establishment speed and early wear tolerance. The sulphur aids root development. On clay sites, treating the prepared soil surface before laying turf or sowing seed gives new grass the best possible start.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWhy liquid gypsum is ideal for lawns\u003c\/span\u003e\n\u003cp\u003eMost soil amendments require digging or incorporation — impossible on an established lawn without destroying it. Liquid gypsum is applied to the surface and washes into the root zone with rain or irrigation. It delivers calcium and sulphur directly where the grass roots are, improves clay structure beneath the turf without disturbance, and does not alter soil pH — so it will not affect the balance of grass species in your sward. It is one of the very few products that can meaningfully improve the soil under a lawn without lifting the turf.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eClay soil conditioning\u003c\/h3\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eClay soil — initial treatment (months 1–3)\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 15 ml per litre at 1 L\/m² | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 2 weeks\u003c\/div\u003e\n\u003cp\u003eApply the full clay conditioning rate fortnightly for the first three months. Water in thoroughly after each application. Apply to the soil surface evenly. Begin in early spring or autumn when the soil is moist and workable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eClay soil — maintenance (month 4 onwards)\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10 ml per litre at 1 L\/m² | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Monthly\u003c\/div\u003e\n\u003cp\u003eReduce to the monthly maintenance rate once you begin to see improvement in surface drainage or soil workability. Continue throughout the growing season.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFertigation — drip or trickle\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 5–10 ml per litre | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 2–4 weeks\u003c\/div\u003e\n\u003cp\u003eAdd to the irrigation reservoir after main nutrient solution. Use a coarse inline filter (500 micron minimum). Not suitable for precision drip emitters with apertures below 500 microns without filtration. Shake product well before adding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eSpot treatment — individual plants\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 5 ml per litre; 200–500 ml per plant | \u003cstrong\u003eFrequency:\u003c\/strong\u003e Weekly for 2–3 weeks then assess\u003c\/div\u003e\n\u003cp\u003eFor a single plant showing blossom end rot or bitter pit, apply directly around the root zone at the higher volume to saturate the root zone with immediately available calcium.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhen liquid gypsum will and will not help your drainage\u003c\/h3\u003e\n\u003cp\u003eGypsum is a powerful tool for the right problem — but it is not a universal drainage fix. Before applying, you need to understand what is actually causing your waterlogging. There are three distinct causes of poor drainage, and gypsum only addresses one of them.\u003c\/p\u003e\n\u003cdiv class=\"drf-compare\"\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eGypsum WILL help — chemically dispersed clay\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eClay particles have lost the calcium that holds them in open aggregates\u003c\/li\u003e\n\u003cli\u003eSodium or magnesium has displaced calcium on clay exchange sites, causing particles to disperse and pack flat\u003c\/li\u003e\n\u003cli\u003eCommon in gardens with hard water irrigation, high-sodium soils, or where builders have exposed subsoil clay\u003c\/li\u003e\n\u003cli\u003eGypsum's calcium replaces sodium on exchange sites; sulphate converts the sodium to a soluble salt that washes out\u003c\/li\u003e\n\u003cli\u003eDrainage improvement is usually measurable within one season of regular applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eGypsum will NOT help — mechanical compaction\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSoil structure has been physically destroyed by weight — foot traffic, machinery, vehicles on wet ground\u003c\/li\u003e\n\u003cli\u003eNo chemical amendment can undo mechanical compression — the soil needs physical intervention\u003c\/li\u003e\n\u003cli\u003eThe fix is mechanical: deep forking, broadfork aeration, hollow-tine aeration, or double-digging with organic matter\u003c\/li\u003e\n\u003cli\u003eOnce compaction is physically broken, \u003cem\u003ethen\u003c\/em\u003e gypsum can prevent the clay from re-dispersing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eGypsum will NOT help — inadequate physical drainage\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIf water has \u003cstrong\u003enowhere to drain to\u003c\/strong\u003e, no soil amendment of any kind will fix the problem\u003c\/li\u003e\n\u003cli\u003eHigh water table — groundwater sits at or near the surface, especially in winter; the soil may be perfectly structured but is simply saturated from below\u003c\/li\u003e\n\u003cli\u003eImpermeable subsoil pan — a natural clay or iron pan layer deep in the soil profile blocks all downward water movement regardless of topsoil condition\u003c\/li\u003e\n\u003cli\u003eMissing land drains — older properties, new-build sites, and gardens on flat terrain may simply lack any drainage infrastructure to carry water away\u003c\/li\u003e\n\u003cli\u003ePoor site grading — water flows towards, not away from, the problem area due to the lie of the land\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe fix is infrastructure:\u003c\/strong\u003e land drains, French drains, soakaways, regrading, or raised beds to lift the growing zone above the water table\u003c\/li\u003e\n\u003cli\u003eApplying liquid gypsum (or any other product) to soil that is waterlogged because there is no drainage outlet is a waste of product and money\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eHow to diagnose your drainage problem\u003c\/h3\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003eThe screwdriver test — checking for compaction\u003c\/h4\u003e\n\u003cp\u003ePush a long screwdriver into moist soil. In uncompacted soil, it should push in to at least 15–20 cm with moderate hand pressure. If it meets a hard, resistant layer within 5–10 cm, you have a compaction pan. This is a mechanical problem — gypsum will not fix it. Fork it, broadfork it, or hollow-tine aerate it first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\n\u003ch4\u003eThe jar test — checking for dispersed clay\u003c\/h4\u003e\n\u003cp\u003eFill a clean jam jar one-third with soil, fill the rest with water, add a teaspoon of dishwasher salt, and shake vigorously for two minutes. Leave undisturbed for 48 hours. If the water remains cloudy, your clay is chemically dispersed and gypsum will help. To confirm, repeat with a second jar adding a capful of liquid gypsum — if it clears faster, your soil will respond to treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\n\u003ch4\u003eThe hole test — checking for a drainage outlet\u003c\/h4\u003e\n\u003cp\u003eDig a hole 30 cm deep and 30 cm wide in the problem area. Fill it with water and time how long it takes to drain. If the water is still sitting in the hole after 24 hours, you have a fundamental drainage problem — either a high water table, an impermeable subsoil pan, or no drainage gradient. This is not a chemistry problem. No liquid product will fix it. You need physical drainage: land drains, a French drain, a soakaway, or raised beds to lift the growing zone above the saturated layer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\n\u003ch4\u003eThe ribbon test — confirming clay content\u003c\/h4\u003e\n\u003cp\u003eTake a small lump of moist soil and squeeze it between thumb and forefinger to form a flat ribbon. True clay forms a smooth, shiny ribbon 5 cm or longer. If you cannot form a ribbon, your drainage problem is unlikely to be clay-related — look at subsoil panning, water table, or surface grading instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eStep-by-step preparation\u003c\/h3\u003e\n\u003col class=\"drf-steps\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eShake the bottle thoroughly.\u003c\/strong\u003e Invert and shake vigorously for 30 seconds. The product is thick and creamy — this is normal for a mineral suspension. Never measure from an unshaken bottle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasure and mix into a small amount of warm water first.\u003c\/strong\u003e Measure the required amount into a small jug or cup containing a splash of warm water. Stir until the thick suspension is fully dispersed — this ensures a thorough mix with no residue left on the spoon or measuring vessel. The warm water dissolves the mineral paste cleanly off everything it touches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdd this concentrate to the rest of your water.\u003c\/strong\u003e Pour the pre-mixed concentrate into your watering can or spray container filled with the remaining volume of water. Stir briefly — the suspension will remain stable during normal use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApply to the root zone or foliage.\u003c\/strong\u003e For root drenches, apply evenly around the base and water in. For foliar, filter through fine mesh and apply in early morning or evening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse fresh — do not store diluted.\u003c\/strong\u003e Prepare only as much as you need for each application and use immediately.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003ePreventing blossom end rot — the timing that matters\u003c\/span\u003e\n\u003cp\u003eBlossom end rot, bitter pit, and tip-burn are most effectively prevented by starting liquid gypsum applications \u003cem\u003ebefore\u003c\/em\u003e symptoms appear. By the time you see the first blackened blossom end, the calcium deficiency occurred 2–3 weeks earlier. Begin root drenches at 1 tsp\/L fortnightly from transplanting or fruit set, and increase to weekly at 2 tsp\/L during rapid fruit expansion. Once symptoms appear, continue at the higher rate and add a weekly foliar spray.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with…\u003c\/span\u003e\n\u003cp\u003eFor maximum calcium delivery, combine liquid gypsum root drenches with \u003cstrong\u003eFulvic Acid Powder\u003c\/strong\u003e — the fulvic acid chelates calcium ions for faster root uptake. For long-term soil structure building, use \u003cstrong\u003eHumic Acid Granules\u003c\/strong\u003e as a monthly soil drench — humic acid raises soil CEC, helping it hold calcium between applications. On lawns, combine with \u003cstrong\u003eSeaweed Powder\u003c\/strong\u003e drenches for improved root depth and stress tolerance alongside the calcium and sulphur from gypsum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════════════════════════════════════════════ --\u003e \u003c!-- TAB 4 — THE SCIENCE                                --\u003e \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n\u003cdiv id=\"drf-gy-panel4\" class=\"drf-panel\"\u003e\n\u003ch2\u003eHow does liquid gypsum work? The science of calcium \u0026amp; sulphur in soil, lawn and fruit\u003c\/h2\u003e\n\u003ch3\u003eCalcium's dual role — soil structure and plant physiology\u003c\/h3\u003e\n\u003cp\u003eCalcium is unusual among plant nutrients in that it is simultaneously critical to soil chemistry and plant biology. In the soil, calcium acts as the primary cation binding clay particles together into stable aggregates — the open, crumb structure that allows drainage, aeration, and root exploration. When calcium is displaced from clay exchange sites by sodium or magnesium, clay particles disperse and the soil structure collapses into a dense, impermeable layer. Restoring calcium to those exchange sites is the mechanism by which gypsum corrects clay soils.\u003c\/p\u003e\n\u003cp\u003eInside the plant, calcium is an \u003cstrong\u003eimmobile structural nutrient\u003c\/strong\u003e — unlike nitrogen or potassium, it cannot be remobilised from older tissue to supply new growth. Every new cell wall requires a fresh supply of calcium delivered by the transpiration stream from the roots. When the rate of new cell production in developing fruit exceeds the rate of calcium delivery — typically during rapid fruit expansion in heat or after irregular watering — the newest cells are formed with deficient cell walls that collapse and die. This is the visible result of blossom end rot and bitter pit: not a shortage of calcium in the soil, but a \u003cem\u003efailure of delivery\u003c\/em\u003e to the fastest-growing tissue.\u003c\/p\u003e\n\u003chr class=\"drf-sep\"\u003e\n\u003cdiv class=\"drf-compare\"\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eThe calcium role — Cell walls, soil aggregates \u0026amp; fruit integrity\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eStructural component of every new plant cell wall via the middle lamella\u003c\/li\u003e\n\u003cli\u003eBinds clay particles into stable soil aggregates through electrostatic attraction\u003c\/li\u003e\n\u003cli\u003eImmobile in plants — cannot be translocated from old tissue to new growth\u003c\/li\u003e\n\u003cli\u003eDeficiency always shows in newest, fastest-growing tissue first\u003c\/li\u003e\n\u003cli\u003eCritical during fruit set and rapid fruit fill in all fruiting crops\u003c\/li\u003e\n\u003cli\u003eDelivered as plant-available Ca²⁺ from calcium sulphate dissolution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eThe sulphate role — Sodium displacement, protein synthesis \u0026amp; soil health\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFourth major crop nutrient — frequently deficient in UK soils since the 1990s\u003c\/li\u003e\n\u003cli\u003eRequired for cysteine, methionine, and other sulphur-containing amino acids\u003c\/li\u003e\n\u003cli\u003eSulphate displaces sodium from clay exchange sites — the clay-busting mechanism\u003c\/li\u003e\n\u003cli\u003eSodium sulphate formed is soluble and leaches from the root zone with watering\u003c\/li\u003e\n\u003cli\u003eStrongly involved in root development and crop immune function\u003c\/li\u003e\n\u003cli\u003eImmediately available as sulphate-S — no microbial conversion required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"drf-sep\"\u003e\n\u003ch3\u003eWhy does water pool on the surface of clay soils?\u003c\/h3\u003e\n\u003cp\u003eWhen a heavy clay garden floods and stays wet for days, the problem is almost always at the very surface — a hard skin only a millimetre or two thick that water can't get through. The soil below it might be perfectly capable of draining; it just can't be reached. That skin is the \u003cstrong\u003esurface seal\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eHere is how it forms. Clay is made of microscopic flat particles, far too small to see — smaller than a grain of pollen. In a healthy garden these particles stick to each other in small crumbs, and water flows freely between the crumbs through the gaps. When the first heavy rain of the season hits bare clay, raindrops strike with enough force to knock individual particles loose from those crumbs. The loose particles wash into the gaps and clog them. As the surface dries, the trapped particles glue themselves together as a continuous hard crust. The next rain has nowhere to go and pools on top (Agassi, Shainberg \u0026amp; Morin 1981).\u003c\/p\u003e\n\u003cp\u003eWhat decides whether clay particles will stick together properly or fall apart on contact with rainwater is the chemistry sitting on their surfaces. Each clay particle carries a slight negative electrical charge — and just like two negative magnets, two clay particles will push each other apart unless something positively charged is in between to bridge them. \u003cstrong\u003eCalcium does that bridging job better than anything else that naturally occurs in soil.\u003c\/strong\u003e It has the right charge and the right size to sit tightly between adjacent clay particles and hold them together. Sodium and (to a lesser extent) magnesium are weaker bridges — when they take calcium's place on the clay surfaces, the bridges fail, the particles drift apart, and surface sealing begins.\u003c\/p\u003e\n\u003ch3\u003eHow liquid gypsum prevents and reverses the surface seal — three ways it works\u003c\/h3\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003eWorking immediately (hours)\u003c\/h4\u003e\n\u003cp\u003eWhen gypsum dissolves it releases two things into the soil water: calcium and sulphate. Both are dissolved minerals, and their presence alone — even before any chemical reaction with the clay — has an immediate physical effect. The level of dissolved minerals in the water is what tells the clay particles whether to drift apart or pull together. Above a certain threshold, dissolved minerals effectively crowd the clay particles back into contact with each other. Liquid gypsum delivers enough dissolved calcium and sulphate to cross that threshold within hours of being watered in. This is why visible improvements in surface drainage often show up after a single rain or watering cycle, long before any deeper soil chemistry has had time to change. The threshold itself was established in foundational soil-physics research from the 1950s (Quirk \u0026amp; Schofield 1955).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\n\u003ch4\u003eLasting fix (weeks to months)\u003c\/h4\u003e\n\u003cp\u003eOver the following weeks the calcium from the dissolved gypsum slowly displaces the troublemaking sodium and excess magnesium that were sitting on the clay surfaces in the first place. Calcium has a stronger natural attraction to clay than either of those, so it wins these slow swaps every time. As calcium takes its proper place between clay particles, the bridges that hold the soil together are physically restored. The crumb structure rebuilds itself from the surface downwards. This is the slower of the two effects but it is what actually fixes the soil rather than just suppressing the symptom.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\n\u003ch4\u003eFlushing out the troublemakers\u003c\/h4\u003e\n\u003cp\u003eWhen calcium kicks sodium or magnesium off the clay surfaces, those displaced minerals are now floating loose in the soil water. If left there they would simply re-attach. This is where the sulphate part of gypsum matters. Sulphate combines with sodium to make a highly water-soluble salt that gets washed downwards and out of the root zone with every rainfall. Over the course of a growing season the soil's chemistry shifts permanently toward a healthier calcium-dominated state. Agricultural lime — the cheaper calcium source — contains no sulphate, which is why it significantly underperforms gypsum on heavy clay despite being a less expensive way to deliver the calcium itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWhy this works faster than granular gypsum\u003c\/span\u003e\n\u003cp\u003eStandard agricultural gypsum is sold as granules. Spread on the surface of a lawn or border, granules dissolve very slowly — much of the product sits inert for weeks while only the outermost surface releases any calcium. Research from 1981 showed that how quickly the gypsum dissolves at the soil surface is the single biggest factor in how well it actually works against surface sealing — slow-dissolving granules are simply not effective at the surface (Keren \u0026amp; Shainberg 1981). This product is wet-milled down to particles only five thousandths of a millimetre across (5 microns) and supplied already mixed into water as a thick suspension. Once it touches wet soil it is essentially dissolved within hours. The immediate effect described above is delivered exactly where the seal forms, exactly when rainfall arrives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eHow liquid gypsum stops water pooling on UK clay soil\u003c\/h3\u003e\n\u003cp\u003eThe science above was originally worked out for salt-affected soils in Australia, the Mediterranean and the American west, where irrigation water has carried high levels of sodium into garden soils for decades. UK gardens don't usually have a sodium problem. But the same surface pooling still affects millions of British clay gardens — and the fix is the same.\u003c\/p\u003e\n\u003cp\u003eThere are two reasons UK clay still disperses and seals at the surface, even without high sodium.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMagnesium imbalance.\u003c\/strong\u003e Most UK clay garden soils — the heavy, sticky soils that turn rock-hard in summer and waterlogged in winter — are dominated by a clay mineral called illite, often mixed with smectite. These minerals are particularly sensitive to the balance of calcium and magnesium sitting on their surfaces. When magnesium starts to outweigh calcium (the rule of thumb is anything below roughly a 3-to-1 calcium-to-magnesium ratio), the magnesium plays the same disruptive role that sodium plays in Australian clays: it weakens the bonds holding clay particles together, the particles disperse, and the surface seals up. Same problem, milder intensity, same fix (Curtin et al. 1994; Dontsova \u0026amp; Norton 2002).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompaction.\u003c\/strong\u003e Walking on wet ground, digging when the soil is too damp, the legacy of building work or trenching — anything that physically crushes the soil's natural crumb structure flat against the surface. The crushed clay at the surface is now exposed raw to every rainfall and disperses on contact, even when the chemistry beneath it is healthy. This is why a trampled lawn or path edge pools water more than an undisturbed border: it has lost its surface structure.\u003c\/p\u003e\n\u003cp\u003eEither cause produces the same visible problem. Rainwater that should soak in instead sits on the surface for hours or days, then runs off into the lowest corner of the garden. The lawn squelches underfoot. The vegetable bed turns into a shallow pond after every heavy shower. The roots underneath sit in stagnant water with no oxygen.\u003c\/p\u003e\n\u003cp\u003eLiquid gypsum fixes both versions of the problem the same way it fixes the textbook sodium version. The calcium it releases doesn't care which troublemaking mineral it has to displace — sodium or magnesium, either one. The sulphate doesn't care either — it combines with whatever was displaced and washes it down out of the root zone with the next rainfall. And the sudden boost of dissolved minerals in the water (the \"Working immediately\" card above) crowds the loose clay particles back together within hours, regardless of what was keeping them apart.\u003c\/p\u003e\n\u003chr class=\"drf-sep\"\u003e\n\u003ch3\u003eSix mechanisms of action\u003c\/h3\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003eCell Wall Construction\u003c\/h4\u003e\n\u003cp\u003eCalcium is the primary component of the middle lamella — the layer between plant cells that determines cell wall integrity and firmness. Every rapidly dividing cell in a developing fruit, leaf, or root tip requires a continuous supply of calcium. Liquid gypsum delivers calcium sulphate directly into the root zone in immediately absorbable form, maintaining the rate of calcium supply needed to match fast cell division during fruit set and fill.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\n\u003ch4\u003eClay Flocculation \u0026amp; Soil Structure\u003c\/h4\u003e\n\u003cp\u003eClay particles carry a negative surface charge that is normally balanced by calcium ions — keeping them aggregated into stable crumbs. When sodium or magnesium displaces calcium from these exchange sites, clay particles disperse and pack tightly, destroying soil structure. Calcium sulphate restores calcium to those exchange sites while sulphate reacts with displaced sodium to form sodium sulphate — a soluble salt that leaches out with watering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\n\u003ch4\u003eSodium Displacement\u003c\/h4\u003e\n\u003cp\u003eIn gardens irrigated with hard water, or where soils have a history of sodium accumulation, liquid gypsum provides the fastest practical method of sodium management. The calcium from gypsum displaces sodium from clay exchange sites; the sulphate converts the free sodium to soluble sodium sulphate; regular watering then leaches the sodium sulphate below the root zone. This process can measurably improve soil tilth within a single season of regular applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\n\u003ch4\u003eSulphur as Protein Builder\u003c\/h4\u003e\n\u003cp\u003eSulphur is essential for the synthesis of cysteine, methionine, and other sulphur-containing amino acids that are the building blocks of plant proteins, enzymes, and glucosinolates. UK soils have been consistently sulphur-deficient since atmospheric deposition from industrial emissions declined in the 1990s. Gypsum delivers immediately available sulphate-sulphur that requires no microbial conversion before root uptake — the fastest-acting sulphur source available in organic gardening.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\n\u003ch4\u003eFulvic Acid Enhanced Uptake\u003c\/h4\u003e\n\u003cp\u003eThe fulvic acid included in this formulation chelates the calcium ions in solution, keeping them mobile and preventing precipitation when the product is mixed with other inputs or applied to alkaline soils. Fulvic acid also increases the permeability of root cell membranes, improving the rate at which calcium and sulphate ions are actively absorbed. The result is measurably faster and more complete uptake compared to unfulficated calcium sulphate suspensions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\n\u003ch4\u003eFruit Quality \u0026amp; Shelf Life\u003c\/h4\u003e\n\u003cp\u003eCalcium is the principal determinant of fruit firmness: adequate calcium in developing fruit cell walls produces firm, dense tissue that resists bruising, breakdown, and post-harvest decay. Regular liquid gypsum applications during fruit set and fill consistently improve the firmness and shelf life of tomatoes, peppers, apples, strawberries, and other calcium-sensitive crops — extending the window for harvest, storage, and sale.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-refs\"\u003e\n\u003ch4\u003eScientific References\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eBangerth, F. (1979). Calcium-related physiological disorders of plants. \u003cem\u003eAnnual Review of Phytopathology\u003c\/em\u003e, 17, 97–122.\u003c\/li\u003e\n\u003cli\u003eHo, L.C. \u0026amp; White, P.J. (2005). A cellular hypothesis for the induction of blossom-end rot in tomato fruit. \u003cem\u003eAnnals of Botany\u003c\/em\u003e, 95(4), 571–581.\u003c\/li\u003e\n\u003cli\u003eWhite, P.J. \u0026amp; Broadley, M.R. (2003). Calcium in plants. \u003cem\u003eAnnals of Botany\u003c\/em\u003e, 92(4), 487–511.\u003c\/li\u003e\n\u003cli\u003eBronick, C.J. \u0026amp; Lal, R. (2005). Soil structure and management: a review. \u003cem\u003eGeoderma\u003c\/em\u003e, 124(1–2), 3–22.\u003c\/li\u003e\n\u003cli\u003eTisdale, S.L. et al. (1993). \u003cem\u003eSoil Fertility and Fertilizers\u003c\/em\u003e (5th ed.). Macmillan. [Sulphur nutrition in plants]\u003c\/li\u003e\n\u003cli\u003eCanellas, L.P. \u0026amp; Olivares, F.L. (2014). Physiological responses to humic substances as plant growth promoters. \u003cem\u003eChemical and Biological Technologies in Agriculture\u003c\/em\u003e, 1(1), 3.\u003c\/li\u003e\n\u003cli\u003eRengasamy, P. \u0026amp; Olsson, K.A. (1991). Sodicity and soil structure. \u003cem\u003eAustralian Journal of Soil Research\u003c\/em\u003e, 29(6), 935–952.\u003c\/li\u003e\n\u003cli\u003eQadir, M. et al. (2001). Amelioration strategies for sodic soils. \u003cem\u003eLand Degradation \u0026amp; Development\u003c\/em\u003e, 12(4), 357–386.\u003c\/li\u003e\n\u003cli\u003eQuirk, J.P. \u0026amp; Schofield, R.K. (1955). The effect of electrolyte concentration on soil permeability. \u003cem\u003eJournal of Soil Science\u003c\/em\u003e, 6(2), 163–178.\u003c\/li\u003e\n\u003cli\u003eAgassi, M., Shainberg, I. \u0026amp; Morin, J. (1981). Effect of electrolyte concentration and soil sodicity on infiltration rate and crust formation. \u003cem\u003eSoil Science Society of America Journal\u003c\/em\u003e, 45(5), 848–851.\u003c\/li\u003e\n\u003cli\u003eKeren, R. \u0026amp; Shainberg, I. (1981). Effect of dissolution rate on the efficiency of industrial and mined gypsum in improving infiltration of a sodic soil. \u003cem\u003eSoil Science Society of America Journal\u003c\/em\u003e, 45(1), 103–107.\u003c\/li\u003e\n\u003cli\u003eShainberg, I. \u0026amp; Letey, J. (1984). Response of soils to sodic and saline conditions. \u003cem\u003eHilgardia\u003c\/em\u003e, 52(2), 1–57.\u003c\/li\u003e\n\u003cli\u003eCurtin, D., Steppuhn, H. \u0026amp; Selles, F. (1994). Effects of magnesium on cation selectivity and structural stability of sodic soils. \u003cem\u003eSoil Science Society of America Journal\u003c\/em\u003e, 58(3), 730–737.\u003c\/li\u003e\n\u003cli\u003eDontsova, K. \u0026amp; Norton, L.D. (2002). Clay dispersion, infiltration and erosion as influenced by exchangeable Ca and Mg. \u003cem\u003eSoil Science\u003c\/em\u003e, 167(3), 184–193.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════════════════════════════════════════════ --\u003e \u003c!-- TAB 5 — FAQ                                        --\u003e \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n\u003cdiv id=\"drf-gy-panel5\" class=\"drf-panel\"\u003e\n\u003ch2\u003eLiquid gypsum FAQ — what it is, how to apply it, and which questions UK gardeners ask most\u003c\/h2\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq1\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq1\" class=\"drf-faq-q\"\u003eWhy is this product thick and creamy rather than a clear liquid?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eBecause it is a genuine mineral suspension, not a manufactured liquid. Natural gypsum rock has been wet-milled down to 5 micron particles and suspended in water with fulvic acid. Those mineral particles are physically present in the liquid — which is why it is opaque, dense, and settles on standing. Synthetic liquid gypsum products are made from industrial byproduct calcium sulphate processed with chemical dispersants and surfactants — they may appear thinner or more uniform because those synthetic additives prevent natural settling. The thick consistency of this product is what real micronised natural mineral looks like in liquid form, and the settling is proof that no synthetic dispersants have been added.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq2\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq2\" class=\"drf-faq-q\"\u003eWhy is my soil calcium level fine but I still get blossom end rot?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eBecause blossom end rot is a delivery problem, not a supply problem. Calcium is immobile in plants — it travels only upward through the transpiration stream and cannot be moved from old tissue to new. Developing fruit at the blossom end are dividing cells faster than almost anywhere else in the plant. Any disruption to calcium flow — hot weather, irregular watering, root damage — causes the newest cells to form with inadequate calcium. Those cells collapse and die. Increasing the concentration of immediately available calcium in the root zone with regular liquid gypsum drenches maintains the supply rate and prevents the deficit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq3\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq3\" class=\"drf-faq-q\"\u003eWhat is the difference between this and synthetic liquid gypsum?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eThis product is made from naturally mined gypsum, micronised to 5 microns and suspended in water with fulvic acid — no synthetic additives, no industrial byproduct gypsum, no chemical dispersants. Most other liquid gypsum products on the market are made from industrial byproduct calcium sulphate — typically FGD gypsum from coal power stations or phosphogypsum from fertiliser manufacture — processed with synthetic surfactants and dispersants to create a pourable liquid. The differences matter: natural mined gypsum is a clean geological mineral with no process contaminants; byproduct gypsum can carry trace heavy metals and other residues from the industrial process it came from. This product is ACO Organic Certified; synthetic manufactured liquid gypsum is not. See the Organic vs Synthetic tab for the full comparison.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq4\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq4\" class=\"drf-faq-q\"\u003eWhy use liquid gypsum rather than lime for calcium?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eLime significantly raises soil pH, which is often undesirable on already-neutral or slightly alkaline soils. Gypsum supplies calcium without meaningfully changing soil pH. The micronised suspension delivers calcium in immediately available form, not over months. Gypsum also supplies sulphate-sulphur and the sulphate component actively displaces sodium from clay. If your soil is both acid and calcium deficient, lime corrects both. If your soil is already at the right pH, liquid gypsum is the appropriate calcium source.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq5\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq5\" class=\"drf-faq-q\"\u003eIs liquid gypsum good for lawns?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eYes — it is one of the most practical lawn care inputs available. Calcium strengthens grass cell walls, improving wear tolerance and disease resistance. Sulphur supports protein synthesis and deepens green colour. On clay lawns, the sulphate displaces sodium from the clay beneath the turf, gradually improving drainage and aeration without disturbing the surface. Apply monthly at 10 ml\/L at 1 L\/m² as standard maintenance, or at 15 ml\/L fortnightly for active clay treatment. The best results come from applying immediately after hollow-tine aeration, when the open channels allow the product to penetrate directly into the clay layer.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq6\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq6\" class=\"drf-faq-q\"\u003eWill liquid gypsum fix my waterlogged garden?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eOnly if the waterlogging is caused by chemically dispersed clay — where sodium has displaced calcium on clay exchange sites, causing the particles to pack into an impermeable layer. Gypsum will not fix waterlogging caused by mechanical compaction (foot traffic, machinery), a high water table, an impermeable subsoil pan, missing land drains, or poor site grading. If water sits on your soil because it has nowhere to drain to, no liquid product will fix that — you need physical drainage infrastructure. Use the diagnostic tests in the How to Use tab to identify your specific problem before purchasing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq7\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq7\" class=\"drf-faq-q\"\u003eWill it leave a white residue on my plants?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eAt standard root drench rates there is no visible residue. Applied as a foliar spray at higher concentrations, the product can leave a fine white mineral deposit on leaves — this is the micronised gypsum itself and is harmless. Apply in early morning so the residue dries and blends in. Any residue washes off with rain or irrigation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq8\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq8\" class=\"drf-faq-q\"\u003eHow does the 2 tsp rate differ from the 1 tsp rate?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eThe 1 tsp\/L (5 ml\/L) rate is a maintenance dose for regular fortnightly applications. The 2 tsp\/L (10 ml\/L) rate is a corrective dose for use when deficiency symptoms are already showing or during rapid fruit fill. It delivers twice the calcium per watering. There is no phytotoxicity risk at either rate — calcium sulphate is a benign mineral with no phytotoxic threshold at garden application levels.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq9\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq9\" class=\"drf-faq-q\"\u003eWhich crops benefit most from liquid gypsum?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eAny rapidly fruiting crop with high calcium demand. The most responsive are tomatoes, peppers, aubergines, apples, pears, strawberries, courgettes, cucumbers, and leafy brassicas. Root crops benefit from the sulphur. Lawns benefit from the calcium (wear tolerance) and sulphur (green colour, protein synthesis), and from the clay-improving action beneath the turf. For roses and flowering plants, calcium supports firm, well-formed flowers and strengthens stems.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq10\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq10\" class=\"drf-faq-q\"\u003eIs it safe for organic growing and edible crops?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eYes. This product is certified for use in organic agriculture by the Australian Certified Organic (ACO) programme. Calcium sulphate is a naturally occurring mineral with no synthetic chemistry, no toxicity to soil organisms, and no withholding period for edible crops. Once the drench has been absorbed or the foliar spray has dried, the garden is safe for pets and children as normal.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq11\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq11\" class=\"drf-faq-q\"\u003eCan I use this in hard water areas?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eYes — and it is particularly valuable in hard water areas. The sulphate from liquid gypsum helps displace sodium and excess magnesium that accumulate with repeated hard water irrigation, and the immediately available calcium in sulphate form is more easily taken up by plants than the carbonate calcium from the water itself.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-gy-faq12\" type=\"checkbox\"\u003e\u003clabel for=\"drf-gy-faq12\" class=\"drf-faq-q\"\u003eHow should I store liquid gypsum?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eStore in a cool, dry place out of direct sunlight. Tested safe down to 5°C — sedimentation may occur below this temperature but is reversible on warming and shaking. Do not allow to freeze. Store in the original container — do not pre-dilute. Shake well before each use. Shelf life is at least 12 months from manufacture when stored correctly.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════════ INLINE STRUCTURED DATA (Product + FAQPage + HowTo) ═══════════════ --\u003e \u003c!-- Embedded JSON-LD travels with the product description. Do NOT paste these schemas separately elsewhere. --\u003e \u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"https:\/\/www.drforest.co.uk\/products\/liquid-gypsum-micronised-calcium-sulphate#faq\",\n      \"about\": {\n        \"@id\": \"https:\/\/www.drforest.co.uk\/products\/liquid-gypsum-micronised-calcium-sulphate#product\"\n      },\n      \"mainEntity\": [\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Why is this product thick and creamy rather than a clear liquid?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Because it is a genuine mineral suspension, not a manufactured liquid. Natural gypsum rock has been wet-milled down to 5 micron particles and suspended in water with fulvic acid. Those mineral particles are physically present in the liquid — which is why it is opaque, dense, and settles on standing. Synthetic liquid gypsum products are made from industrial byproduct calcium sulphate processed with chemical dispersants and surfactants — they may appear thinner or more uniform because those synthetic additives prevent natural settling. The thick consistency of this product is what real micronised natural mineral looks like in liquid form, and the settling is proof that no synthetic dispersants have been added.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Why is my soil calcium level fine but I still get blossom end rot?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Because blossom end rot is a delivery problem, not a supply problem. Calcium is immobile in plants — it travels only upward through the transpiration stream and cannot be moved from old tissue to new. Developing fruit at the blossom end are dividing cells faster than almost anywhere else in the plant. Any disruption to calcium flow — hot weather, irregular watering, root damage — causes the newest cells to form with inadequate calcium. Those cells collapse and die. Increasing the concentration of immediately available calcium in the root zone with regular liquid gypsum drenches maintains the supply rate and prevents the deficit.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What is the difference between this and synthetic liquid gypsum?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"This product is made from naturally mined gypsum, micronised to 5 microns and suspended in water with fulvic acid — no synthetic additives, no industrial byproduct gypsum, no chemical dispersants. Most other liquid gypsum products on the market are made from industrial byproduct calcium sulphate — typically FGD gypsum from coal power stations or phosphogypsum from fertiliser manufacture — processed with synthetic surfactants and dispersants to create a pourable liquid. The differences matter: natural mined gypsum is a clean geological mineral with no process contaminants; byproduct gypsum can carry trace heavy metals and other residues from the industrial process it came from. This product is ACO Organic Certified; synthetic manufactured liquid gypsum is not. See the Organic vs Synthetic tab for the full comparison.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Why use liquid gypsum rather than lime for calcium?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Lime significantly raises soil pH, which is often undesirable on already-neutral or slightly alkaline soils. Gypsum supplies calcium without meaningfully changing soil pH. The micronised suspension delivers calcium in immediately available form, not over months. Gypsum also supplies sulphate-sulphur and the sulphate component actively displaces sodium from clay. If your soil is both acid and calcium deficient, lime corrects both. If your soil is already at the right pH, liquid gypsum is the appropriate calcium source.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Is liquid gypsum good for lawns?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes — it is one of the most practical lawn care inputs available. Calcium strengthens grass cell walls, improving wear tolerance and disease resistance. Sulphur supports protein synthesis and deepens green colour. On clay lawns, the sulphate displaces sodium from the clay beneath the turf, gradually improving drainage and aeration without disturbing the surface. Apply monthly at 10 ml\/L at 1 L\/m² as standard maintenance, or at 15 ml\/L fortnightly for active clay treatment. The best results come from applying immediately after hollow-tine aeration, when the open channels allow the product to penetrate directly into the clay layer.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Will liquid gypsum fix my waterlogged garden?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Only if the waterlogging is caused by chemically dispersed clay — where sodium has displaced calcium on clay exchange sites, causing the particles to pack into an impermeable layer. Gypsum will not fix waterlogging caused by mechanical compaction (foot traffic, machinery), a high water table, an impermeable subsoil pan, missing land drains, or poor site grading. If water sits on your soil because it has nowhere to drain to, no liquid product will fix that — you need physical drainage infrastructure. Use the diagnostic tests in the How to Use tab to identify your specific problem before purchasing.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Will it leave a white residue on my plants?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"At standard root drench rates there is no visible residue. Applied as a foliar spray at higher concentrations, the product can leave a fine white mineral deposit on leaves — this is the micronised gypsum itself and is harmless. Apply in early morning so the residue dries and blends in. Any residue washes off with rain or irrigation.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"How does the 2 tsp rate differ from the 1 tsp rate?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"The 1 tsp\/L (5 ml\/L) rate is a maintenance dose for regular fortnightly applications. The 2 tsp\/L (10 ml\/L) rate is a corrective dose for use when deficiency symptoms are already showing or during rapid fruit fill. It delivers twice the calcium per watering. There is no phytotoxicity risk at either rate — calcium sulphate is a benign mineral with no phytotoxic threshold at garden application levels.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Which crops benefit most from liquid gypsum?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Any rapidly fruiting crop with high calcium demand. The most responsive are tomatoes, peppers, aubergines, apples, pears, strawberries, courgettes, cucumbers, and leafy brassicas. Root crops benefit from the sulphur. Lawns benefit from the calcium (wear tolerance) and sulphur (green colour, protein synthesis), and from the clay-improving action beneath the turf. For roses and flowering plants, calcium supports firm, well-formed flowers and strengthens stems.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Is it safe for organic growing and edible crops?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. This product is certified for use in organic agriculture by the Australian Certified Organic (ACO) programme. Calcium sulphate is a naturally occurring mineral with no synthetic chemistry, no toxicity to soil organisms, and no withholding period for edible crops. Once the drench has been absorbed or the foliar spray has dried, the garden is safe for pets and children as normal.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can I use this in hard water areas?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes — and it is particularly valuable in hard water areas. The sulphate from liquid gypsum helps displace sodium and excess magnesium that accumulate with repeated hard water irrigation, and the immediately available calcium in sulphate form is more easily taken up by plants than the carbonate calcium from the water itself.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"How should I store liquid gypsum?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Store in a cool, dry place out of direct sunlight. Tested safe down to 5°C — sedimentation may occur below this temperature but is reversible on warming and shaking. Do not allow to freeze. Store in the original container — do not pre-dilute. Shake well before each use. Shelf life is at least 12 months from manufacture when stored correctly.\"\n          }\n        }\n      ]\n    },\n    {\n      \"@type\": \"HowTo\",\n      \"@id\": \"https:\/\/www.drforest.co.uk\/products\/liquid-gypsum-micronised-calcium-sulphate#howto\",\n      \"name\": \"How to apply liquid gypsum — preparation, application rates and crop guide\",\n      \"description\": \"Application rates and methods for premium organic liquid gypsum (19.55% calcium, 15.31% sulphur, 5 micron particle size). Covers preparation, root drench, foliar spray, lawn applications (including liquid gypsum for lawns on clay), clay soil conditioning, fertigation and spot treatment for blossom end rot. Always shake bottle thoroughly before use — the suspension settles on standing and must be re-dispersed before measuring.\",\n      \"about\": {\n        \"@id\": \"https:\/\/www.drforest.co.uk\/products\/liquid-gypsum-micronised-calcium-sulphate#product\"\n      },\n      \"supply\": [\n        {\n          \"@type\": \"HowToSupply\",\n          \"name\": \"Liquid Gypsum (19.55% Ca, 15.31% S micronised mineral suspension)\"\n        },\n        {\n          \"@type\": \"HowToSupply\",\n          \"name\": \"Water (room temperature, with a small amount of warm water for the initial mix)\"\n        }\n      ],\n      \"tool\": [\n        {\n          \"@type\": \"HowToTool\",\n          \"name\": \"Measuring spoon (5 ml \/ 1 tsp) or syringe\"\n        },\n        {\n          \"@type\": \"HowToTool\",\n          \"name\": \"Small jug or cup for pre-mixing\"\n        },\n        {\n          \"@type\": \"HowToTool\",\n          \"name\": \"Watering can or knapsack sprayer (with 200-500 micron filter for foliar)\"\n        }\n      ],\n      \"step\": [\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Preparation\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Shake the bottle thoroughly\",\n              \"text\": \"Invert and shake vigorously for 30 seconds. The product is thick and creamy — this is normal for a mineral suspension. Never measure from an unshaken bottle, or the dose will be inconsistent.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Pre-mix into warm water\",\n              \"text\": \"Measure the required amount into a small jug or cup containing a splash of warm water. Stir until the thick suspension is fully dispersed — this ensures a thorough mix with no residue left on the spoon or measuring vessel. The warm water dissolves the mineral paste cleanly off everything it touches.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Add concentrate to the rest of the water\",\n              \"text\": \"Pour the pre-mixed concentrate into your watering can or spray container filled with the remaining volume of water. Stir briefly — the suspension will remain stable during normal use.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Apply to root zone or foliage\",\n              \"text\": \"For root drenches, apply evenly around the base of the plant and water in. For foliar sprays, filter through fine mesh first and apply in early morning or evening, never in direct sun.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Use fresh — do not store diluted\",\n              \"text\": \"Prepare only as much working solution as you need for each application and use immediately. Do not pre-dilute and store; mix fresh every time.\"\n            }\n          ]\n        },\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"General application rates\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Root drench — general maintenance\",\n              \"text\": \"1 tsp (5 ml) per litre of water, every 2–4 weeks during the growing season. Apply around the root zone, not over the crown. Water in well after application. Standard rate for all plants — compatible with all Dr Forest fertilisers.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Root drench — active deficiency or high demand\",\n              \"text\": \"2 tsp (10 ml) per litre, weekly until symptoms resolve, then return to fortnightly. Use when blossom end rot, bitter pit or tip-burn is already occurring, or during rapid fruit fill in tomatoes, peppers and apples.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Foliar spray — rapid calcium correction\",\n              \"text\": \"5 ml per litre of water, weekly during fruit set and fill. Filter through 200 micron mesh before use. Apply in early morning or evening — avoid full sun, which can cause the suspension to leave a white residue on leaves. Delivers calcium directly through the leaf and fruit surface for the fastest possible correction.\"\n            }\n          ]\n        },\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Lawn and turf\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Lawn — general maintenance\",\n              \"text\": \"10 ml per litre at 1 L\/m², monthly during the growing season (March–October). Apply with a watering can fitted with a rose, or through a knapsack sprayer. Water in lightly after application. Supports cell wall strength in grass plants, improving wear tolerance, disease resistance and recovery from foot traffic. The sulphur deepens green colour.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Lawn on clay — soil improvement\",\n              \"text\": \"15 ml per litre at 1 L\/m², every 2 weeks for the first 3 months, then monthly. Higher rate for lawns on heavy clay that drains poorly or waterlogs in winter. The sulphate displaces sodium from the clay beneath the turf, gradually improving drainage and aeration without disturbing the lawn surface. Combine with hollow-tine aeration in autumn for best results.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Lawn — after aeration or scarifying\",\n              \"text\": \"10–15 ml per litre at 1 L\/m², immediately after aeration, then monthly. The open channels and exposed soil from hollow-tine aeration, slit aeration or scarifying allow the liquid gypsum to penetrate directly into the clay layer beneath the turf — the single most effective timing for clay treatment under lawns.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"New turf or overseeding\",\n              \"text\": \"10 ml per litre at 1 L\/m² at laying or sowing, then fortnightly for 6 weeks. Calcium supports strong cell wall construction in new grass plants, improving establishment speed and early wear tolerance. The sulphur aids root development. On clay sites, treat the prepared soil surface before laying turf or sowing seed.\"\n            }\n          ]\n        },\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Clay soil conditioning\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Clay soil — initial treatment (months 1–3)\",\n              \"text\": \"15 ml per litre at 1 L\/m², every 2 weeks. Apply the full clay conditioning rate fortnightly for the first three months. Water in thoroughly. Apply to the soil surface evenly. Begin in early spring or autumn when the soil is moist and workable.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Clay soil — maintenance (month 4 onwards)\",\n              \"text\": \"10 ml per litre at 1 L\/m², monthly. Reduce to the maintenance rate once you begin to see improvement in surface drainage or soil workability. Continue throughout the growing season.\"\n            }\n          ]\n        },\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Fertigation and spot treatment\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Fertigation — drip or trickle irrigation\",\n              \"text\": \"5–10 ml per litre, every 2–4 weeks. Add to the irrigation reservoir after the main nutrient solution. Use a coarse inline filter (500 micron minimum). Not suitable for precision drip emitters with apertures below 500 microns without filtration. Shake product well before adding.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Spot treatment — individual plants with active deficiency\",\n              \"text\": \"5 ml per litre at 200–500 ml per plant, weekly for 2–3 weeks then assess. For a single plant showing blossom end rot or bitter pit, apply directly around the root zone at the higher volume to saturate it with immediately available calcium.\"\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\n\u003c\/script\u003e\n\u003c\/div\u003e","brand":"Dr Forest","offers":[{"title":"1 litre","offer_id":55997612917110,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true},{"title":"500ml","offer_id":55997612949878,"sku":null,"price":12.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/organic-liquid-gypsum-fertiliser-white-plastic-bottle-ribbed-cap-326.png?v=1774782731"},{"product_id":"liquid-suspension-fertiliser-micronised-calcium-phosphate","title":"Liquid Phosphate Fertiliser UK | Calcium Phosphate Suspension | Foliar Spray","description":"\u003c!-- Dr Forest — Liquid Micronised Calcium Phosphate Suspension Product Page --\u003e\n\u003c!-- Prefix: cp --\u003e\n\u003cstyle\u003e\n  .drf-wrap *, .drf-wrap *::before, .drf-wrap *::after { box-sizing: border-box; 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font-weight: 600; padding: 0.6em 0.8em; text-align: left; font-size: 0.85em; letter-spacing: 0.04em; }\n  .drf-wrap table td { padding: 0.55em 0.8em; border-bottom: 1px solid var(--drf-border); }\n  .drf-wrap table tr:nth-child(even) td { background: var(--drf-grn-light); }\n\u003c\/style\u003e\n\n\u003cdiv class=\"drf-wrap\"\u003e\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-cp-tabset\" id=\"drf-cp-tab1\" checked\u003e\n  \u003cinput type=\"radio\" name=\"drf-cp-tabset\" id=\"drf-cp-tab2\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-cp-tabset\" id=\"drf-cp-tab3\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-cp-tabset\" id=\"drf-cp-tab4\"\u003e\n  \u003cdiv class=\"drf-tab-labels\"\u003e\n    \u003clabel for=\"drf-cp-tab1\"\u003eOverview\u003c\/label\u003e\n    \u003clabel for=\"drf-cp-tab2\"\u003eThe Science\u003c\/label\u003e\n    \u003clabel for=\"drf-cp-tab3\"\u003eHow to Use\u003c\/label\u003e\n    \u003clabel for=\"drf-cp-tab4\"\u003eFAQ\u003c\/label\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"drf-panels\"\u003e\n\n  \u003c!-- ═══════════ TAB 1 — OVERVIEW ═══════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-cp-panel1\"\u003e\n    \u003ch2\u003eLiquid micronised calcium phosphate — calcium and phosphorus together in one product\u003c\/h2\u003e\n    \u003cdiv class=\"drf-badge-row\"\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e24.56% Calcium\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e10.71% Phosphorus\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e10.73% Silicon\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eRecycled Plastic Bottle\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eACO Certified Organic\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eContains Fulvic Acid\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cp\u003eCalcium and phosphorus are the two most important minerals for photosynthesis and sugar production in plants. But here is the problem: in ionic form, they are chemically incompatible. Mix dissolved calcium with dissolved phosphate and they precipitate out of solution instantly — locked up and unavailable. This is why no conventional liquid fertiliser can deliver both. \u003cstrong\u003eThis product solves that problem.\u003c\/strong\u003e By suspending micronised mineral calcium phosphate in colloidal form with fulvic acid, both elements coexist in a single plant-available liquid — something that is not possible with any dissolved salt formulation.\u003c\/p\u003e\n    \u003cp\u003eThe source is \u003cstrong\u003enatural mineral calcium phosphate\u003c\/strong\u003e — rich in calcium, phosphorus, silicon, manganese, and iron. Micronised and suspended in a fulvic acid carrier that improves foliar and root uptake while feeding soil biology. \u003cstrong\u003eACO certified organic\u003c\/strong\u003e (456AI). Suitable as a foliar spray, soil drench, or fertigation input across all growth stages from pre-planting to fruit fill.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-stats\"\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e24.56%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCalcium (Ca)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e10.71%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003ePhosphorus (P)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e10.73%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eSilicon (Si)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003eACO\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCertified Organic\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3\u003eFull analysis\u003c\/h3\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n\u003cth\u003eNutrient\u003c\/th\u003e\n\u003cth\u003eContent (w\/v)\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCalcium (Ca)\u003c\/td\u003e\n\u003ctd\u003e24.56%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSilicon (Si)\u003c\/td\u003e\n\u003ctd\u003e10.73%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTotal Phosphorus (P)\u003c\/td\u003e\n\u003ctd\u003e10.71%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e  — citrate insoluble P\u003c\/td\u003e\n\u003ctd\u003e7.56%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e  — citrate soluble P\u003c\/td\u003e\n\u003ctd\u003e3.15%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003e  — water soluble P\u003c\/td\u003e\n\u003ctd\u003e20 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eManganese (Mn)\u003c\/td\u003e\n\u003ctd\u003e1.66%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eIron (Fe)\u003c\/td\u003e\n\u003ctd\u003e0.86%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMagnesium (Mg)\u003c\/td\u003e\n\u003ctd\u003e0.34%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePotassium (K) — organic\u003c\/td\u003e\n\u003ctd\u003e0.15%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eZinc (Zn)\u003c\/td\u003e\n\u003ctd\u003e0.14%\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCopper (Cu)\u003c\/td\u003e\n\u003ctd\u003e162 mg\/L\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n    \u003cp\u003e\u003cem\u003eSG: 1.5  |  pH: 6.5–8.5  |  Appearance: thick, mid-brown liquid, citrus odour\u003c\/em\u003e\u003c\/p\u003e\n\n    \u003ch3\u003eWhat this calcium phosphate is used for\u003c\/h3\u003e\n    \u003cul class=\"drf-uses\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDelivering calcium and phosphorus together\u003c\/strong\u003e — the only liquid format that combines both minerals in plant-available form; eliminates the need for separate Ca and P applications that risk antagonistic lock-up\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eBoosting brix and sugar levels\u003c\/strong\u003e — calcium and phosphorus are both required for photosynthesis; supplying them together directly increases the plant's capacity to produce and transport sugars to fruit\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eRoot development and establishment\u003c\/strong\u003e — phosphorus drives root cell division; calcium builds the cell walls of every new root tip; together they produce faster, stronger root establishment at planting\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFlowering and fruit set\u003c\/strong\u003e — phosphorus fuels the energy metabolism of flowering; calcium strengthens pollen tube formation and fruit cell walls; critical from pre-flower through to fruit fill\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSilicon for plant defence\u003c\/strong\u003e — 10.73% silicon strengthens cell walls, improves drought tolerance, and increases resistance to fungal attack; an often-overlooked mineral that most fertilisers do not supply\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eBonus trace minerals\u003c\/strong\u003e — 1.66% manganese, 0.86% iron, plus zinc and copper; delivers meaningful micronutrient supplementation alongside the primary calcium and phosphorus\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSoil biology stimulation\u003c\/strong\u003e — fulvic acid carrier feeds beneficial soil microorganisms and improves cation exchange capacity alongside delivering minerals\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eWhy micronised mineral calcium phosphate instead of conventional phosphorus?\u003c\/h3\u003e\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eMicronised Mineral Suspension — this product\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eCalcium and phosphorus coexist in colloidal form — no precipitation\u003c\/li\u003e\n          \u003cli\u003eNatural mineral source: Ca, P, Si, Mn, Fe, Zn, Cu in one product\u003c\/li\u003e\n          \u003cli\u003eFulvic acid improves foliar uptake and feeds soil biology\u003c\/li\u003e\n          \u003cli\u003eACO certified organic — audited and compliant\u003c\/li\u003e\n          \u003cli\u003eNo nitrogen included — apply P and Ca without forcing unwanted N\u003c\/li\u003e\n          \u003cli\u003eCompatible with most fertiliser inputs (non-ionic)\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eConventional P Sources (MAP\/DAP, Bone Meal)\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eMAP\/DAP: highly acidic near the root zone; contains nitrogen whether you want it or not\u003c\/li\u003e\n          \u003cli\u003eBone meal: slow to break down, coarse particle size, unavailable for weeks\u003c\/li\u003e\n          \u003cli\u003eNeither can be combined with calcium in liquid form — they precipitate\u003c\/li\u003e\n          \u003cli\u003eNo silicon, no manganese, no fulvic acid — single-purpose inputs\u003c\/li\u003e\n          \u003cli\u003eBone meal is a slaughterhouse by-product — not suitable for plant-based growing systems\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eHandcrafted in Stockport\u003c\/span\u003e\u003cp\u003eEvery Dr Forest product is made by hand in small batches at our workshop in Stockport, Greater Manchester. We source ingredients for quality, not cost. Supplied in recycled plastic bottles.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════ TAB 2 — THE SCIENCE ═══════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-cp-panel2\"\u003e\n    \u003ch2\u003eThe science of calcium-phosphorus delivery from micronised mineral calcium phosphate\u003c\/h2\u003e\n    \u003ch3\u003eThe incompatibility problem\u003c\/h3\u003e\n    \u003cp\u003eCalcium (Ca²⁺) and phosphate (PO₄³⁻) ions are strongly attracted to each other. In any dissolved solution, they react immediately to form insoluble calcium phosphate precipitate — a white solid that drops out of solution and becomes unavailable to plants. This is why no conventional liquid fertiliser can contain both. It is also why adding soluble phosphate to calcium-rich soil often results in rapid lock-up. The colloidal micronised form sidesteps this chemistry entirely: the minerals are suspended as ultra-fine particles, not dissolved ions. They do not react with each other because they are not in ionic form.\u003c\/p\u003e\n    \u003chr class=\"drf-sep\"\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eNon-Ionic Colloidal Delivery\u003c\/h4\u003e\n\u003cp\u003eIn a micronised mineral suspension, the mineral particles are ground to sub-200-micron size and held in liquid by fulvic acid and surfactant action. Because the calcium and phosphorus remain locked in their mineral matrix rather than dissolved as free ions, they cannot precipitate. Once applied to soil or leaf surfaces, the particles are broken down by root exudates, microbial activity, and organic acids into plant-available ionic forms — but by that point they are in the rhizosphere, not in a mixing tank. This is why micronised suspensions can deliver mineral combinations that dissolved solutions cannot.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\u003ch4\u003eCitrate Soluble Phosphorus\u003c\/h4\u003e\n\u003cp\u003eThe phosphorus in this product exists in three forms: citrate insoluble (7.56%), citrate soluble (3.15%), and water soluble (20 mg\/L). The citrate-soluble fraction is the most agronomically significant — it represents phosphorus that dissolves in the weak organic acids produced by plant roots and soil microorganisms. This is precisely the mechanism by which plants access phosphorus from rock-based sources. The high citrate-soluble fraction confirms that this phosphorus is genuinely plant-available through natural root activity, not just on paper.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\u003ch4\u003eCalcium — Cell Walls, Signalling, Sugar Transport\u003c\/h4\u003e\n\u003cp\u003eCalcium cross-links pectin chains in cell walls, providing structural rigidity. It also functions as a secondary messenger in cellular signalling pathways — triggering defence responses to pathogen attack, regulating stomatal opening, and controlling pollen tube growth during fertilisation. Calcium is phloem-immobile: once deposited in a cell wall, it cannot be redistributed. This means actively growing tissues — root tips, shoot tips, developing fruit — require continuous external supply. Foliar and drench application of micronised calcium delivers it directly to where demand is highest.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\u003ch4\u003ePhosphorus — Energy Currency of the Plant\u003c\/h4\u003e\n\u003cp\u003ePhosphorus is a component of ATP (adenosine triphosphate) — the molecule that stores and transfers energy in every living cell. Every metabolic reaction that requires energy — photosynthesis, sugar transport, cell division, root growth, flowering — depends on phosphorus. Deficient plants cannot produce enough ATP to power normal growth, resulting in stunted root systems, delayed flowering, and poor fruit set. Phosphorus is also a key component of DNA, RNA, and cell membranes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\u003ch4\u003eSilicon — The Forgotten Defence Mineral\u003c\/h4\u003e\n\u003cp\u003eAt 10.73%, the silicon content of this product is unusually high. Silicon deposits in cell walls as amorphous silica, forming a physical barrier against fungal penetration and insect feeding. Research consistently demonstrates that silicon-supplemented plants show improved resistance to powdery mildew, botrytis, and other foliar pathogens. Silicon also improves water use efficiency by reducing transpiration through thickened cuticles, and increases tolerance to heavy metal toxicity in contaminated soils.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\u003ch4\u003eManganese and Iron — Hidden Bonus\u003c\/h4\u003e\n\u003cp\u003eAt 1.66% Mn and 0.86% Fe, this product delivers meaningful micronutrient supplementation as a secondary benefit. Manganese is required for the water-splitting reaction in photosystem II — the first step of photosynthesis. Iron is essential for chlorophyll synthesis and electron transport. Both are commonly deficient in alkaline or calcareous soils. Receiving them alongside calcium and phosphorus from a single product simplifies the nutrition programme and reduces the number of separate inputs required.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-refs\"\u003e\n\u003ch4\u003eScientific References\u003c\/h4\u003e\n\u003col\u003e\n      \u003cli\u003eMarschner, P. (2012). \u003cem\u003eMarschner's Mineral Nutrition of Higher Plants\u003c\/em\u003e. 3rd ed. Academic Press.\u003c\/li\u003e\n      \u003cli\u003eMa, J.F. \u0026amp; Yamaji, N. (2006). Silicon uptake and accumulation in higher plants. \u003cem\u003eTrends in Plant Science\u003c\/em\u003e, 11(8), 392–397.\u003c\/li\u003e\n      \u003cli\u003eWhite, P.J. \u0026amp; Broadley, M.R. (2003). Calcium in plants. \u003cem\u003eAnnals of Botany\u003c\/em\u003e, 92(4), 487–511.\u003c\/li\u003e\n      \u003cli\u003eNardi, S. et al. (2009). Physiological effects of humic substances on higher plants. \u003cem\u003eSoil Biol. Biochem.\u003c\/em\u003e, 41, 215–229.\u003c\/li\u003e\n      \u003cli\u003eLiang, Y. et al. (2007). Importance of plant species and external silicon concentration to active silicon uptake and transport. \u003cem\u003eNew Phytologist\u003c\/em\u003e, 172(1), 63–72.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════ TAB 3 — HOW TO USE ═══════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-cp-panel3\"\u003e\n    \u003ch2\u003eHow to use liquid micronised calcium phosphate: application rates \u0026amp; guide\u003c\/h2\u003e\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eShake vigorously before every use\u003c\/span\u003e\u003cp\u003eThis is a heavy mineral suspension (SG 1.5) — significantly denser than water. The particles settle rapidly during storage. Shake vigorously for 15–20 seconds before measuring. Add to a small amount of warm water (20–30°C) and stir for at least 30 seconds before topping up. Maintain constant agitation during sprayer use. Use a coarse inline filter (500 micron \/ 35 mesh) to prevent blockages from contaminants.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003eApplication rates — professional \u0026amp; commercial\u003c\/h3\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFoliar spray — vegetables\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10 ml per litre of water (1 L per 100 L)  |  \u003cstrong\u003eMax per hectare:\u003c\/strong\u003e 5 L\/ha\u003c\/div\u003e\n\u003cp\u003eApply weekly or as required. Target all growth stages from planting through to fruit fill. Ensure thorough foliage coverage. Where higher water volumes are needed, do not exceed the maximum product rate per hectare.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFoliar spray — orchards \u0026amp; vineyards\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10 ml per litre of water (1 L per 100 L)  |  \u003cstrong\u003eMax per hectare:\u003c\/strong\u003e 10 L\/ha\u003c\/div\u003e\n\u003cp\u003eApply every 2–4 weeks or as required. Particularly valuable from pre-flower through fruit fill for calcium-dependent fruit quality and phosphorus-driven energy metabolism.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFoliar spray — ornamentals \u0026amp; turf\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10 ml per litre of water (1 L per 100 L)  |  \u003cstrong\u003eMax per hectare:\u003c\/strong\u003e 7 L\/ha\u003c\/div\u003e\n\u003cp\u003eApply every 2–4 weeks or as required. Silicon content improves disease resistance and structural strength in managed landscapes.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eBroadacre crops \u0026amp; pasture\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 2–3 L\/ha in 60–100 L water  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e As required\u003c\/div\u003e\n\u003cp\u003eAdjust water volume depending on canopy closure. Apply at key growth stages based on crop monitoring and soil test data.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFertigation \u0026amp; soil amelioration\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 10–30 L\/ha  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e As required\u003c\/div\u003e\n\u003cp\u003eUse the higher rate for soil amelioration where phosphorus and calcium deficiencies have been identified. Use the lower rate for maintenance fertigation. Always consider nitrogen and phosphorus crop requirements based on reliable soil test data.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLiquid inject — in-furrow at planting\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 2–5 L\/ha  |  \u003cstrong\u003eDilution:\u003c\/strong\u003e Minimum 1 part product to 3 parts water\u003c\/div\u003e\n\u003cp\u003eApply in-furrow at planting for immediate root-zone access to calcium and phosphorus. Rate depends on crop, row spacing, and soil type.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eSpot spraying\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 5 ml per litre of water (50 ml per 10 L)  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e As required\u003c\/div\u003e\n\u003cp\u003eFor targeted foliar application to individual plants or small areas showing deficiency symptoms.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003eApplication rates — home garden\u003c\/h3\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFoliar spray \u0026amp; soil drench\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 45 ml per 9-litre watering can  |  \u003cstrong\u003eCoverage:\u003c\/strong\u003e Apply 1 litre of diluted mix per m²\u003c\/div\u003e\n\u003cp\u003eShake well before use. Dilute 45 ml into a 9-litre watering can. The diluted mix can be applied as a soil drench around the root zone or poured over foliage as a foliar feed. Repeat every 2–4 weeks or as required during the growing season.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eGrowth stage guide\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eAll stages:\u003c\/strong\u003e Pre-planting through to fruit fill\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003ePre-planting:\u003c\/strong\u003e Drench soil before planting to build calcium and phosphorus reserves. \u003cstrong\u003ePlanting \u0026amp; establishment:\u003c\/strong\u003e Apply as a root drench to support root cell division. \u003cstrong\u003eVegetative growth:\u003c\/strong\u003e Every 2–4 weeks to support strong structural development. \u003cstrong\u003ePre-flower to fruit fill:\u003c\/strong\u003e Every 2–3 weeks to fuel flowering energy and fruit cell wall construction.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003eStep-by-step preparation\u003c\/h3\u003e\n    \u003col class=\"drf-steps\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eShake the bottle vigorously\u003c\/strong\u003e for 15–20 seconds. This is a heavy suspension — particles settle quickly.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMeasure the required volume.\u003c\/strong\u003e Home garden: 45 ml per 9L watering can. Use a measuring cup or syringe.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eAdd to a small amount of warm water\u003c\/strong\u003e (20–30°C) and stir vigorously for 30 seconds. Then top up to the full volume.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eApply immediately.\u003c\/strong\u003e For foliar, spray both leaf surfaces in early morning or late evening. For soil drench, apply at 1L per m² around the root zone.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eClean equipment after use.\u003c\/strong\u003e The mineral particles can settle and clog sprayer nozzles if left to dry. Flush with clean water immediately after application.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eVisible residue on foliage\u003c\/span\u003e\u003cp\u003eMicronised mineral suspensions leave a visible residue on leaves and fruit. This is normal and not harmful. If produce appearance matters close to harvest, switch to soil drench application or spray earlier in the growing season.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with…\u003c\/span\u003e\u003cp\u003eUse alongside \u003cstrong\u003eYorkshire Polyhalite\u003c\/strong\u003e for slow-release K, Ca, Mg, and S in the soil. Pair with \u003cstrong\u003eMicro-7\u003c\/strong\u003e for complete chelated trace element coverage. Add \u003cstrong\u003eSeaweed Powder\u003c\/strong\u003e for biostimulant activity and improved foliar wetting. Compatible with most fertiliser inputs due to the non-ionic colloidal format — but avoid combining with concentrated dissolved calcium or phosphate solutions. Jar-test before mixing with any new product.\u003c\/p\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════ TAB 4 — FAQ ═══════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-cp-panel4\"\u003e\n    \u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq1\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq1\"\u003eWhy can't normal liquid fertilisers contain both calcium and phosphorus?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eDissolved calcium ions (Ca²⁺) and phosphate ions (PO₄³⁻) react to form insoluble calcium phosphate precipitate. It drops out of solution and becomes unavailable. This is basic chemistry — you cannot dissolve both in the same liquid. The micronised colloidal form solves this: the minerals are suspended as ultra-fine solid particles, not dissolved ions, so they cannot react with each other.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq2\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq2\"\u003eWhat is the phosphorus source?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eNatural mineral calcium phosphate — a mineral deposit rich in calcium phosphate, silicon, manganese, and iron. It is micronised (ground to ultra-fine particles) and suspended in a fulvic acid carrier. This is not a synthetic phosphate source. ACO certified organic.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq3\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq3\"\u003eIs the phosphorus actually plant-available?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes. The analysis shows 3.15% citrate-soluble phosphorus — this is the fraction that dissolves in the weak organic acids produced by plant roots and soil microbes. This is the standard measure of plant-available phosphorus from rock-based sources. The micronised particle size also accelerates breakdown compared to coarser rock phosphate products.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq4\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq4\"\u003eHow is this different from bone meal?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eThree differences: particle size, mineral complexity, and source. This product is micronised to sub-200-micron particles — it breaks down in days, not months. It also delivers silicon (10.73%), manganese (1.66%), and iron (0.86%) that bone meal does not contain. And it is mineral-sourced — plant-based growers who avoid slaughterhouse by-products can use this without compromise.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq5\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq5\"\u003eWhy is the silicon content important?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eSilicon deposits in cell walls as amorphous silica, creating a physical barrier against fungal penetration and insect feeding. Research consistently shows silicon-supplemented plants have improved resistance to powdery mildew, botrytis, and aphids. Silicon also improves water use efficiency and drought tolerance. Most fertilisers contain no silicon — the 10.73% in this product is a significant bonus.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq6\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq6\"\u003eDoes this contain nitrogen?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eNo. This is a nitrogen-free source of calcium and phosphorus. This is a significant advantage when you need P and Ca without forcing additional nitrogen — conventional options like MAP, DAP, and calcium nitrate all include nitrogen whether you want it or not. Use this product when you need calcium and phosphorus at any growth stage without pushing vegetative growth.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq7\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq7\"\u003eWill it leave marks on my plants?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — micronised mineral suspensions leave a visible residue on foliage and fruit. This is harmless. If appearance matters close to harvest, use as a soil drench instead of foliar spray, or time foliar applications earlier in the growing season.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq8\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq8\"\u003eCan I use this in drip irrigation?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes, with appropriate precautions. Maintain constant agitation in the mixing tank. Use a coarse inline filter (500 micron \/ 35 mesh). The product passes through standard irrigation equipment under normal conditions. Flush lines with clean water after use to prevent residue buildup.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq9\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq9\"\u003eHow should I store it?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eStore upright in a cool, dry place between 5–25°C, out of direct sunlight. Keep sealed. Shake vigorously before each use. Do not store below 5°C — sedimentation may occur. Do not store in diluted form — mix fresh for each application.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-cp-faq10\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-cp-faq10\"\u003eIs the bottle recyclable?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes. This product is supplied in recycled plastic bottles.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\n\u003chr class=\"drf-sep\"\u003e\n\u003ch3\u003eFrom our phosphorus range\u003c\/h3\u003e\n\u003cul\u003e\n      \u003cli\u003e\n\u003ca href=\"\/products\/rock-phosphate-fertiliser-uk-31\"\u003eRock Phosphate Fertiliser\u003c\/a\u003e — 31% P, 46% Ca, micronised mineral powder\u003c\/li\u003e\n      \u003cli\u003e\n\u003ca href=\"\/products\/organic-phosphorus-fertiliser-15\"\u003ePhosphorus Meal\u003c\/a\u003e — 15% P, calcined plant meal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Dr Forest","offers":[{"title":"1 litre","offer_id":55997624451446,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true},{"title":"500ml","offer_id":55997624484214,"sku":null,"price":12.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/liquid-suspension-fertiliser-micronised-calcium-phosphate-969.webp?v=1772229770"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/collections\/organic-liquid-gypsum-fertiliser-white-plastic-bottle-ribbed-cap-326.png?v=1780517414","url":"https:\/\/www.drforest.co.uk\/collections\/blossom-end-rot.oembed","provider":"Dr Forest","version":"1.0","type":"link"}