{"product_id":"organic-liquid-phosphorus-fertiliser","title":"Organic Phosphorus Fertiliser | Liquid 8% P₂O₅","description":"\u003c!-- Dr Forest — Organic Liquid Phosphorus Fertiliser 8% P2O5 --\u003e\u003c!-- Prefix: drf-lp- | Design System v1.0 | 4-tab --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Pure CSS radio tabs. No JavaScript. Shopify-safe. --\u003e\n\u003cstyle\u003e\n  .drf-wrap *, .drf-wrap *::before, .drf-wrap *::after { box-sizing: border-box; margin: 0; padding: 0; }\n  .drf-wrap { font-family: 'Jost', sans-serif; font-weight: 400; color: #3A4A40; font-size: 14px; line-height: 1.65; width: 100%; max-width: 100%; overflow: hidden; }\n  :root {\n    --drf-grn:        #1B3D2F;\n    --drf-grn-light:  #E8F0EB;\n    --drf-grn-mid:    #4a7a5e;\n    --drf-grn-dark:   #0F2A1F;\n    --drf-gold:       #C5A55A;\n    --drf-gold-light: #FAF7F0;\n    --drf-cream:      #F5F2EC;\n    --drf-border:     #d4cfc5;\n    --drf-muted:      #3A4A40;\n    --drf-white:      #FFFFFF;\n  }\n  .drf-wrap h2 { font-family: 'Cormorant Garamond', serif; font-weight: 400; font-size: 1.9em; color: var(--drf-grn); line-height: 1.25; margin-bottom: 0.5em; letter-spacing: -0.3px; }\n  .drf-wrap h3 { font-family: 'Cormorant Garamond', serif; font-weight: 400; font-size: 1.35em; color: var(--drf-grn); margin: 1.4em 0 0.4em; }\n  .drf-wrap h4 { font-family: 'Jost', sans-serif; font-weight: 500; font-size: 0.85em; letter-spacing: 0.2em; text-transform: uppercase; color: var(--drf-muted); margin: 1.2em 0 0.3em; }\n  .drf-wrap p { margin-bottom: 0.9em; }\n  .drf-wrap ul { padding-left: 1.2em; margin-bottom: 0.9em; }\n  .drf-wrap ul li { margin-bottom: 0.35em; }\n  .drf-wrap strong { font-weight: 500; color: var(--drf-grn); }\n  .drf-wrap em { font-style: italic; color: var(--drf-muted); }\n  .drf-wrap a { color: var(--drf-grn); border-bottom: 1px solid var(--drf-gold); text-decoration: none; }\n\n  \/* BADGES *\/\n  .drf-badge-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 7px; margin: 0 0 12px; }\n  .drf-badge { padding: 9px 12px; font-size: 11px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; display: flex; align-items: center; justify-content: center; text-align: center; min-height: 36px; line-height: 1.3; }\n  .drf-badge-green { background: #eaf4ea; color: #2d6a2d; border: 1px solid #c0d8b0; }\n  .drf-badge-gold  { background: #fdf6e3; color: #8b6914; border: 1px solid #e0cc80; }\n  .drf-badge-dark  { background: var(--drf-grn-dark); color: #d4e4c8; border: 1px solid #2d6a2d; }\n\n  \/* STAT CARDS *\/\n  .drf-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--drf-border); border: 1px solid var(--drf-border); border-top: 2px solid var(--drf-gold); margin: 1.2em 0; max-width: 100%; }\n  .drf-stat { background: var(--drf-white); padding: 0.7em 0.5em; text-align: center; }\n  .drf-stat-number { font-family: 'Cormorant Garamond', serif; font-size: 1.45em; 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: 0.14em; text-transform: uppercase; color: var(--drf-gold); display: block; margin-top: 0.25em; }\n\n  \/* TABS *\/\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: 1.2em; }\n  .drf-tab-labels label { flex: 1 1 0; padding: 0.75em 0.4em; font-size: 0.82em; font-weight: 500; letter-spacing: 0.04em; 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  #drf-lp-tab1:checked ~ .drf-tab-labels label[for=\"drf-lp-tab1\"],\n  #drf-lp-tab2:checked ~ .drf-tab-labels label[for=\"drf-lp-tab2\"],\n  #drf-lp-tab3:checked ~ .drf-tab-labels label[for=\"drf-lp-tab3\"],\n  #drf-lp-tab4:checked ~ .drf-tab-labels label[for=\"drf-lp-tab4\"] { color: var(--drf-grn); background: var(--drf-grn-light); border-bottom-color: var(--drf-grn); font-weight: 600; }\n  #drf-lp-tab1:checked ~ .drf-panels #drf-lp-panel1,\n  #drf-lp-tab2:checked ~ .drf-panels #drf-lp-panel2,\n  #drf-lp-tab3:checked ~ .drf-panels #drf-lp-panel3,\n  #drf-lp-tab4:checked ~ .drf-panels #drf-lp-panel4 { display: block; }\n\n  \/* CALLOUTS *\/\n  .drf-callout { background: var(--drf-grn-light); border-left: 3px solid var(--drf-grn); padding: 1em 1.2em; margin: 1.2em 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: 0.72em; font-weight: 500; letter-spacing: 0.18em; 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  .drf-callout-dark { background: var(--drf-grn-dark); border-left-color: var(--drf-gold); color: var(--drf-cream); }\n  .drf-callout-dark p { color: var(--drf-cream); }\n  .drf-callout-dark strong { color: var(--drf-gold); }\n  .drf-callout-dark .drf-callout-title { color: var(--drf-gold); }\n\n  \/* PULL QUOTE *\/\n  .drf-pullquote { font-family: 'Cormorant Garamond', serif; font-style: italic; font-size: 1.3em; color: var(--drf-grn); text-align: center; line-height: 1.4; padding: 1.1em 1em; margin: 1.6em 0; border-top: 1px solid var(--drf-gold); border-bottom: 1px solid var(--drf-gold); }\n\n  \/* MECHANISM CARDS *\/\n  .drf-mech { border: 1px solid var(--drf-border); border-left: 3px solid var(--drf-gold); padding: 1em 1.2em; margin: 0.8em 0; background: var(--drf-grn-light); }\n  .drf-mech-num { font-family: 'Cormorant Garamond', 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: 1em; font-family: 'Cormorant Garamond', serif; font-weight: 400; }\n  .drf-mech p { font-size: 0.92em; margin-bottom: 0; }\n\n  \/* RATE CARDS *\/\n  .drf-rate { border: 1px solid var(--drf-border); padding: 1em 1.2em; margin: 0.8em 0; background: var(--drf-grn-light); }\n  .drf-rate h4 { margin-top: 0; color: var(--drf-grn); text-transform: none; letter-spacing: 0; font-size: 1.05em; font-family: 'Cormorant Garamond', serif; font-weight: 400; border-bottom: 1px solid var(--drf-gold); padding-bottom: 0.5em; margin-bottom: 0.6em; }\n  .drf-rate-meta { font-size: 0.85em; margin-bottom: 0.5em; }\n  .drf-rate-meta strong { color: var(--drf-gold); }\n  .drf-rate p { font-size: 0.92em; margin-bottom: 0; }\n\n  \/* STEPS *\/\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 var(--drf-border); }\n  .drf-steps li::before { content: counter(drf-step); position: absolute; left: 0; top: 0.8em; width: 2em; height: 2em; background: var(--drf-grn); color: #fff; font-family: 'Cormorant Garamond', serif; font-weight: 400; font-size: 0.9em; display: flex; align-items: center; justify-content: center; }\n  .drf-steps li:last-child { border-bottom: none; }\n\n  \/* USE CASES *\/\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 *\/\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; 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; font-weight: 400; border-bottom: 1px solid var(--drf-gold); padding-bottom: 0.4em; margin-bottom: 0.6em; }\n\n  \/* TABLES *\/\n  .drf-wrap table { width: 100%; border-collapse: collapse; margin: 1.2em 0; font-size: 0.92em; }\n  .drf-wrap table th { background: var(--drf-grn); color: #fff; font-weight: 500; text-align: left; padding: 0.6em 0.8em; 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\n  \/* FAQ *\/\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: 0.8em 0; cursor: pointer; font-weight: 500; color: var(--drf-grn); font-size: 0.95em; }\n  .drf-faq-q::after { content: '+'; font-size: 1.2em; font-weight: 300; color: var(--drf-gold); width: 1.6em; height: 1.6em; border: 1px solid var(--drf-gold); 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; 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); color: #fff; border-color: var(--drf-grn); }\n  .drf-faq input:checked ~ .drf-faq-a { max-height: 900px; }\n\n  \/* REFS + RULE *\/\n  .drf-refs { font-size: 0.78em; color: var(--drf-muted); 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: 1px solid var(--drf-gold); width: 200px; margin: 1.8em auto; }\n\u003c\/style\u003e\n\u003cdiv class=\"drf-wrap\"\u003e\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n\u003cinput checked id=\"drf-lp-tab1\" name=\"drf-lp-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-lp-tab2\" name=\"drf-lp-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-lp-tab3\" name=\"drf-lp-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-lp-tab4\" name=\"drf-lp-tabset\" type=\"radio\"\u003e\n\u003cdiv class=\"drf-tab-labels\"\u003e\n\u003clabel for=\"drf-lp-tab1\"\u003eOverview\u003c\/label\u003e \u003clabel for=\"drf-lp-tab2\"\u003eThe Science\u003c\/label\u003e \u003clabel for=\"drf-lp-tab3\"\u003eHow to Use\u003c\/label\u003e \u003clabel for=\"drf-lp-tab4\"\u003eFAQ\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-panels\"\u003e\n\u003cdiv id=\"drf-lp-panel1\" class=\"drf-panel\"\u003e\n\u003ch2\u003eOrganic liquid phosphorus fertiliser — 8% P₂O₅ plant-available phosphate feed\u003c\/h2\u003e\n\u003cdiv class=\"drf-badge-row\"\u003e\n\u003cspan class=\"drf-badge drf-badge-green\"\u003e8% P₂O₅\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003e100% in solution\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003eLow organic matter\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003eNo clogging\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-gold\"\u003ePlant-based\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-gold\"\u003eRoot feed\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eLiquid phosphorus fertiliser\u003c\/strong\u003e supplies 8% P₂O₅ already dissolved in solution, which sidesteps the single biggest problem with phosphorus in the garden: most of the phosphate applied to soil never reaches a root. Phosphorus is the least mobile of the major nutrients, and in British soils it locks up rapidly — bound to calcium on chalky ground, to iron and aluminium on acid ground. Applying it in solution, low, little and often, puts phosphate where roots are actively working rather than leaving it to be fixed in the wider soil volume.\u003c\/p\u003e\n\u003cp\u003ePhosphorus is what a plant runs on rather than what it builds with. It is in every molecule of ATP, in the phospholipids of every cell membrane and in the backbone of DNA. Shortage shows up first as a plant that simply does not get going — small, dark, sometimes purple-tinged, rooting badly and flowering late.\u003c\/p\u003e\n\u003cp\u003eThe organic matter content is deliberately low at 9%, which keeps the solution thin and clean. It passes through drip lines, dosing pumps and fine sprayer nozzles without the residue that heavier organic feeds leave behind.\u003c\/p\u003e\n\u003cdiv class=\"drf-stats\"\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e8%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003ePhosphorus (P₂O₅)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e9%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eOrganic matter\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e3.5 – 4.5\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003epH\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e1.05 – 1.15\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eDensity kg\/l\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhat to use liquid phosphate for\u003c\/h3\u003e\n\u003cul class=\"drf-uses\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eEstablishing transplants and young plants\u003c\/strong\u003e — the period of highest phosphorus demand in the whole life of a plant. Root initiation and early cell division are both phosphorus-hungry, and a seedling checked at this stage rarely fully catches up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoot development on cuttings, plugs and bare-root stock\u003c\/strong\u003e — phosphorus drives root branching and fine root production. Apply from the point roots first appear and through the following five to six weeks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlower initiation and fruit set\u003c\/strong\u003e — the transition from vegetative growth to flowering runs on phosphorus. A feed in the run-up to and through bud formation supports set rather than drop\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold spring soils\u003c\/strong\u003e — phosphorus uptake falls sharply below about 12 °C because root activity and mycorrhizal function both slow. A liquid feed bypasses the soil chemistry when the ground is still cold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrecting phosphorus deficiency\u003c\/strong\u003e — stunted growth, unusually dark or dull green foliage, purpling on stems and the undersides of older leaves, delayed flowering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChalky and very alkaline soils\u003c\/strong\u003e — where applied phosphate is quickly bound as insoluble calcium phosphate. Small, frequent liquid doses to the root zone are far more efficient than bulk applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePotatoes and root crops during tuber development\u003c\/strong\u003e — especially on light sandy soils and towards the end of the vegetative stage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLiquid phosphate compared with the alternatives\u003c\/h3\u003e\n\u003cdiv class=\"drf-compare\"\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eLiquid phosphorus 8% P₂O₅\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAlready in solution — no dissolution step, no waiting on soil chemistry\u003c\/li\u003e\n\u003cli\u003eLow organic matter, so it runs clean through drip lines and sprayers\u003c\/li\u003e\n\u003cli\u003eApplied little and often to the root zone, where fixation losses are lowest\u003c\/li\u003e\n\u003cli\u003ePlant-derived rather than mined or manufactured\u003c\/li\u003e\n\u003cli\u003eAcidic at pH 3.5 to 4.5, which helps keep phosphate mobile at the root surface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eRock phosphate and bone-based meals\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVery slow release — measured in seasons rather than weeks\u003c\/li\u003e\n\u003cli\u003eUseful for building long-term soil phosphorus reserves\u003c\/li\u003e\n\u003cli\u003eBone-derived products are animal by-products; Dr Forest does not use them\u003c\/li\u003e\n\u003cli\u003eLittle use for correcting an active deficiency in a growing crop\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eSuperphosphate and triple superphosphate\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFast-acting mineral phosphate, manufactured by acidulating rock phosphate\u003c\/li\u003e\n\u003cli\u003eHighly prone to fixation when broadcast across soil rather than placed\u003c\/li\u003e\n\u003cli\u003eNo organic matter and no carbon contribution\u003c\/li\u003e\n\u003cli\u003eDerived from a finite mined resource with a well-documented supply horizon\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout drf-callout-dark\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eDo not mix with calcium\u003c\/span\u003e\n\u003cp\u003ePhosphate and calcium react in solution to form insoluble calcium phosphate. If you combine this feed with a calcium product — liquid gypsum, liquid calcium, or hard tap water treated with a calcium supplement — you will get a white precipitate, a blocked sprayer and no phosphorus reaching the plant. Apply calcium and phosphorus on separate waterings, at least a day apart.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eBlended and bottled in small batches in Stockport, Greater Manchester. Plant-based throughout, with no slaughterhouse by-products at any stage. \u003cem\u003eMade by Growers. Backed by Science.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"drf-lp-panel2\" class=\"drf-panel\"\u003e\n\u003ch2\u003eThe science of phosphorus in plants and soil\u003c\/h2\u003e\n\u003cp\u003ePhosphorus is the nutrient gardeners most often apply and least often deliver. Estimates of the proportion of applied phosphate taken up by a crop in the year of application sit between 10% and 25%. The rest is fixed into forms plants cannot reach (Hinsinger, 2001; Shen et al., 2011).\u003c\/p\u003e\n\u003cp class=\"drf-pullquote\"\u003ePhosphorus in soil is rarely absent. It is usually present and unavailable.\u003c\/p\u003e\n\u003ch3\u003eWhy phosphate locks up\u003c\/h3\u003e\n\u003cp\u003ePhosphate is an anion with a strong affinity for metal cations. Above about pH 7 it precipitates with calcium as increasingly insoluble calcium phosphates. Below about pH 5.5 it binds to iron and aluminium oxides. The window of maximum availability is narrow — roughly pH 6 to 7 — and even inside it, phosphate moves through soil by diffusion alone, at rates measured in millimetres. A root does not find phosphate; phosphate has to be within a millimetre or two of a root hair.\u003c\/p\u003e\n\u003ch3\u003eWhat phosphorus does inside the plant\u003c\/h3\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003eEnergy transfer\u003c\/h4\u003e\n\u003cp\u003eEvery energy transaction in a plant cell runs through ATP, and the phosphate groups are the energy carrier. Photosynthesis, nutrient uptake and every biosynthetic pathway depend on it (Marschner, 2012).\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\u003eCell membranes\u003c\/h4\u003e\n\u003cp\u003ePhospholipids form the bilayer of every membrane in the plant. Cell division cannot proceed without phosphorus, which is why deficiency shows as stunting rather than as a colour change on new growth.\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\u003eNucleic acids\u003c\/h4\u003e\n\u003cp\u003ePhosphate forms the structural backbone of DNA and RNA. Rapidly dividing tissue — root tips, shoot meristems, developing seed — has the highest demand.\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\u003eRoot architecture\u003c\/h4\u003e\n\u003cp\u003ePhosphorus availability directly shapes root branching. Under moderate shortage plants invest in more, finer roots to forage; under severe shortage the whole root system is smaller (Shen et al., 2011).\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\u003eFlowering and seed set\u003c\/h4\u003e\n\u003cp\u003eThe shift from vegetative growth to reproduction carries a step change in phosphorus demand. Deficient plants flower late and set poorly.\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\u003eMycorrhizal partnership\u003c\/h4\u003e\n\u003cp\u003eMost garden plants acquire a large share of their phosphorus through mycorrhizal fungi, which extend the effective root surface many times over. Very heavy phosphate applications suppress that association (Smith \u0026amp; Read, 2008).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr class=\"drf-sep\"\u003e\n\u003ch3\u003eWhy liquid, and why little and often\u003c\/h3\u003e\n\u003cp\u003eFixation is a function of contact between phosphate and soil. Broadcasting dry phosphate across a bed maximises that contact and therefore maximises loss. Delivering a dilute solution directly into the root zone at intervals does the opposite: the phosphate arrives where roots are already working, in a form they can take up immediately, in a quantity small enough to be absorbed before the soil claims it.\u003c\/p\u003e\n\u003cp\u003eThe acidity helps. At pH 3.5 to 4.5 the applied solution briefly lowers pH in the immediate root zone, which is the same trick roots themselves use — root exudation of organic acids to solubilise bound phosphate is a well-described mechanism (Hinsinger, 2001).\u003c\/p\u003e\n\u003ch3\u003eA finite resource, and a plant-derived alternative\u003c\/h3\u003e\n\u003cp\u003ePhosphate rock is a non-renewable mineral resource with no substitute in agriculture, concentrated in a small number of countries. The case for reducing reliance on new extraction is now well established in the literature (Cordell et al., 2009). The phosphorus in this feed is plant-derived.\u003c\/p\u003e\n\u003cp\u003eBecause the feedstock is real plant material, batch-to-batch nutrient content varies slightly around the 8% specification.\u003c\/p\u003e\n\u003ch3\u003eFeeding the soil as well as the plant\u003c\/h3\u003e\n\u003cp\u003eSoil microorganisms mediate a substantial share of phosphorus cycling, mineralising organic phosphorus and solubilising bound inorganic forms (Richardson \u0026amp; Simpson, 2011). Long-run trials show organic and combined organic-mineral fertilisation raising soil enzyme activity substantially over mineral-only regimes — urease by 38.3% and β-glucosidase by 122.4% in one multi-season study (Liu et al., 2021). A plant-derived feed contributes to that system in a way a pure mineral salt does not.\u003c\/p\u003e\n\u003cdiv class=\"drf-refs\"\u003e\n\u003ch4\u003eReferences\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eHinsinger, P. (2001). Bioavailability of soil inorganic P in the rhizosphere as affected by root-induced chemical changes. \u003cem\u003ePlant and Soil\u003c\/em\u003e, 237, 173–195.\u003c\/li\u003e\n\u003cli\u003eShen, J. et al. (2011). Phosphorus dynamics: from soil to plant. \u003cem\u003ePlant Physiology\u003c\/em\u003e, 156(3), 997–1005.\u003c\/li\u003e\n\u003cli\u003eMarschner, P. (ed.) (2012). \u003cem\u003eMarschner's Mineral Nutrition of Higher Plants\u003c\/em\u003e, 3rd edition. Academic Press.\u003c\/li\u003e\n\u003cli\u003eSmith, S.E. \u0026amp; Read, D.J. (2008). \u003cem\u003eMycorrhizal Symbiosis\u003c\/em\u003e, 3rd edition. Academic Press.\u003c\/li\u003e\n\u003cli\u003eRichardson, A.E. \u0026amp; Simpson, R.J. (2011). Soil microorganisms mediating phosphorus availability. \u003cem\u003ePlant Physiology\u003c\/em\u003e, 156(3), 989–996.\u003c\/li\u003e\n\u003cli\u003eCordell, D., Drangert, J.-O. \u0026amp; White, S. (2009). The story of phosphorus: global food security and food for thought. \u003cem\u003eGlobal Environmental Change\u003c\/em\u003e, 19(2), 292–305.\u003c\/li\u003e\n\u003cli\u003eLiu, J. et al. (2021). Soil enzyme responses to long-term organic and mineral fertilisation.\u003c\/li\u003e\n\u003cli\u003eChojnacka, K. et al. (2020). Bio-based fertilizers: a practical approach towards circular economy. \u003cem\u003eBioresource Technology\u003c\/em\u003e, 295, 122223.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"drf-lp-panel3\" class=\"drf-panel\"\u003e\n\u003ch2\u003eHow to use liquid phosphorus fertiliser\u003c\/h2\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eBefore you start\u003c\/span\u003e\n\u003cp\u003eMeasure with a syringe — the doses here are small. The concentrate is acidic at pH 3.5 to 4.5, so avoid skin and eye contact and rinse the measuring kit afterwards. Always dilute into water before applying. This feed is designed for root application rather than foliar spraying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eApplication rates\u003c\/h3\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eRoot drench — standard feeding\u003c\/h4\u003e\n\u003cp class=\"drf-rate-meta\"\u003e\u003cstrong\u003eRate\u003c\/strong\u003e 0.5 – 1 ml per litre of water  |  \u003cstrong\u003eFrequency\u003c\/strong\u003e every 1 – 2 weeks\u003c\/p\u003e\n\u003cp\u003eDelivers roughly 45 to 90 mg\/l of P₂O₅, which sits inside the normal range for horticultural fertigation. Use the upper end for establishing transplants and through flower initiation, the lower end for maintenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eEstablishment feed — transplants, plugs and cuttings\u003c\/h4\u003e\n\u003cp class=\"drf-rate-meta\"\u003e\u003cstrong\u003eRate\u003c\/strong\u003e 1 ml per litre of water  |  \u003cstrong\u003eFrequency\u003c\/strong\u003e weekly for the first 5 – 6 weeks\u003c\/p\u003e\n\u003cp\u003eStart as the first roots develop and continue through establishment. This is the window where phosphorus supply has the greatest effect on the whole season.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFlowering and fruit set support\u003c\/h4\u003e\n\u003cp class=\"drf-rate-meta\"\u003e\u003cstrong\u003eRate\u003c\/strong\u003e 1 ml per litre of water  |  \u003cstrong\u003eFrequency\u003c\/strong\u003e weekly through bud formation and set\u003c\/p\u003e\n\u003cp\u003eApply in the run-up to flowering and through the set period, then taper as fruit begins to fill and potassium demand takes over.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eHow these rates were set\u003c\/span\u003e\n\u003cp\u003eThe source specification gives field rates of 2 to 3 litres per hectare. Converted against typical horticultural water volumes and cross-checked against standard fertigation phosphate concentrations, that lands at 0.5 to 1 ml per litre for garden use. We have stated it in ml per litre because that is the unit a watering can works in.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eMixing\u003c\/h3\u003e\n\u003col class=\"drf-steps\"\u003e\n\u003cli\u003eHalf-fill the watering can with water first.\u003c\/li\u003e\n\u003cli\u003eMeasure the dose with a syringe and add it to the water.\u003c\/li\u003e\n\u003cli\u003eTop up to full volume and stir.\u003c\/li\u003e\n\u003cli\u003eApply to the root zone the same day — water the soil, not the leaves.\u003c\/li\u003e\n\u003cli\u003eRinse equipment through with clean water afterwards.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhen to apply through the season\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eCrop\u003c\/th\u003e\n\u003cth\u003eWhen to apply\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVegetables generally\u003c\/td\u003e\n\u003ctd\u003eFrom first root development, weekly through vegetative growth and fruit formation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTomatoes, peppers, cucumbers\u003c\/td\u003e\n\u003ctd\u003eFrom transplant through to first fruit set, then hand over to a potash feed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop fruit and soft fruit\u003c\/td\u003e\n\u003ctd\u003eFrom first leaves or bud break, repeating every 7 to 14 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePotatoes and root crops\u003c\/td\u003e\n\u003ctd\u003eDuring tuber development, particularly on sandy soils\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrnamentals and bedding\u003c\/td\u003e\n\u003ctd\u003eFive to six weeks from planting, then weekly through bud formation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCuttings and plugs\u003c\/td\u003e\n\u003ctd\u003eWeekly from the first roots appearing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"drf-callout drf-callout-dark\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eNever mix with a calcium product\u003c\/span\u003e\n\u003cp\u003ePhosphate and calcium precipitate on contact. Do not combine this with liquid gypsum, liquid calcium or any calcium supplement in the same watering can. Separate the two by at least a day.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eStorage\u003c\/h3\u003e\n\u003cp\u003eCap tight, dark and dry, between 10 and 25 °C. Shelf life 18 months to 2 years. Do not let it freeze.\u003c\/p\u003e\n\u003ch3\u003eWhat to pair it with\u003c\/h3\u003e\n\u003cp\u003ePair this with the rest of the Dr Forest liquid range. \u003cstrong\u003eLiquid Seaweed Biostimulant\u003c\/strong\u003e covers alginates and natural growth promoters that a straight nutrient feed does not. \u003cstrong\u003eLiquid Gypsum\u003c\/strong\u003e supplies calcium and sulphur — the two things most liquid feeds leave out. \u003cstrong\u003eMicro 7 chelated micronutrients\u003c\/strong\u003e fills the trace element gap on long cropping runs. For a full-season plan, see the \u003ca href=\"\/pages\/living-soil-feeding-schedule\"\u003eDr Forest feeding programme\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"drf-lp-panel4\" class=\"drf-panel\"\u003e\n\u003ch2\u003eLiquid phosphorus fertiliser — common questions\u003c\/h2\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq1\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq1\"\u003eWhat is liquid phosphorus fertiliser and what does it do?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eIt is a phosphate feed supplying 8% P₂O₅ in solution. Phosphorus drives energy transfer, cell division, root development and the switch from vegetative growth into flowering. It is the nutrient that gets a young plant established and a mature one flowering on time.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq2\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq2\"\u003eWhy use a liquid rather than rock phosphate or a dry feed?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eDry phosphate applied across soil is largely fixed before roots reach it — bound to calcium on chalky ground or to iron and aluminium on acid ground. A dilute solution delivered into the root zone little and often puts phosphate where roots are working, in a form they can take up straight away.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq3\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq3\"\u003eCan I use it as a foliar spray?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eIt is formulated as a root feed and that is how we recommend using it. The source specification gives irrigation rates rather than foliar rates, so we have not published a foliar dilution we cannot stand behind.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq4\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq4\"\u003eWhy must I keep it away from calcium?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003ePhosphate and calcium react in solution to form insoluble calcium phosphate. Mixed in the same can you get a white precipitate, a blocked sprayer and no phosphorus reaching the plant. Apply the two at least a day apart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq5\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq5\"\u003eHow do I know my plants are short of phosphorus?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eStunted growth is the first sign, often with foliage that looks unusually dark or dull rather than pale. Purpling on stems and the undersides of older leaves is the classic symptom, though cold weather can produce the same colour without a real deficiency. Late flowering and poor rooting are the other tells.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq6\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq6\"\u003eDoes it work on chalky soil?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eThis is exactly where it earns its place. On alkaline soil, applied phosphate is rapidly bound as insoluble calcium phosphate, so bulk dry applications are inefficient. Small, frequent liquid doses into the root zone get far more of the phosphorus into the plant.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq7\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq7\"\u003eWill it block my drip line or sprayer?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eNo. Organic matter is deliberately low at 9%, which keeps the solution thin and clean. It runs through drip lines, dosing pumps and fine nozzles without residue.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq8\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq8\"\u003eCan I mix it with other Dr Forest liquids?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eIt combines fine with seaweed and with the liquid NPK feeds. The one absolute exclusion is calcium in any form. Patch-test if you are combining three or more products.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq9\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq9\"\u003eIs it safe around children, pets and wildlife?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eIt is a plant-derived nutrient solution with no animal by-products and no pesticide content. The concentrate is acidic, so keep it capped and out of reach and wash hands after handling. Once diluted and watered in, the treated ground is fine.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq10\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq10\"\u003eIs this an organic fertiliser?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eIt is made with organic ingredients and is entirely plant-based, with nutrients and plant-derived throughout. Dr Forest does not hold organic certification for its products, so we say made with organic ingredients rather than certified organic.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq11\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq11\"\u003eWhy is it acidic?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eThe low pH keeps phosphate soluble and mobile. It also briefly acidifies the immediate root zone on application, which is the same mechanism roots use themselves when they exude organic acids to free up bound phosphate.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq12\" type=\"checkbox\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-lp-faq12\"\u003eWhere is it made?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eBlended and bottled in small batches at the Dr Forest workshop in Stockport, Greater Manchester.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- PAA FAQ additions 2026-10-05 (proposed) --\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq-paa1\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lp-faq-paa1\" class=\"drf-faq-q\"\u003eWhen should I use liquid phosphorus?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003e\u003cp\u003eAt two stages. When plants are rooting in, feed transplants, plugs and cuttings weekly at 1 ml per litre for the first 5 to 6 weeks. In the run-up to flowering, feed weekly at 1 ml per litre through bud formation and fruit set, then taper off as the fruit fills. For routine feeding in between, use 0.5 to 1 ml per litre every one to two weeks.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lp-faq-paa2\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lp-faq-paa2\" class=\"drf-faq-q\"\u003eWhat's the difference between phosphorus and phosphate?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003e\u003cp\u003ePhosphorus (P) is the element. Phosphate is the form it's in, both in the feed and in the soil. Fertiliser labels state phosphorus as P₂O₅, which is why this feed reads 8% P₂O₅. That works out at roughly 3.5% elemental phosphorus.\u003c\/p\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- \/PAA FAQ additions --\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ STRUCTURED DATA (FAQPage + HowTo) ═══════════ --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Embedded JSON-LD travels with the product description. Do NOT paste these schemas separately elsewhere. --\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Dr Forest","offers":[{"title":"500ml","offer_id":58307099885942,"sku":"DF-LIQPHOS-500ML","price":13.99,"currency_code":"GBP","in_stock":true},{"title":"1 litre","offer_id":58307099918710,"sku":"DF-LIQPHOS-1L","price":21.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/phopshousfert.png?v=1788645185","url":"https:\/\/www.drforest.co.uk\/products\/organic-liquid-phosphorus-fertiliser","provider":"Dr Forest","version":"1.0","type":"link"}