{"product_id":"organic-tomato-fertiliser","title":"Organic Tomato Fertiliser | Slow Release 3-4-6","description":"\u003c!-- Dr Forest — Tomato Fertiliser 3-4-6 Product Page --\u003e\n\u003c!-- 6-tab layout: Overview | Ingredients | How to Use | Growing Guide | The Science | FAQ --\u003e\n\u003c!-- Prefix: drf-tm- --\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: #2c2c2c; 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: #0f2a1e;\n --drf-gold: #C5A55A;\n --drf-gold-light: #FAF7F0;\n --drf-cream: #F5F2EC;\n --drf-border: #d4cfc5;\n --drf-muted: #666;\n }\n .drf-wrap h2 { font-family: 'Cormorant Garamond', serif; font-weight: 600; font-size: 1.9em; color: var(--drf-grn); line-height: 1.25; margin-bottom: 0.5em; 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margin-bottom: 1.2em; }\n .drf-tab-labels label { flex: 1 1 0; padding: 0.75em 0.3em; font-size: 0.65em; font-weight: 600; letter-spacing: 0.03em; 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-tm-tab1:checked ~ .drf-tab-labels label[for=\"drf-tm-tab1\"],\n #drf-tm-tab2:checked ~ .drf-tab-labels label[for=\"drf-tm-tab2\"],\n #drf-tm-tab3:checked ~ .drf-tab-labels label[for=\"drf-tm-tab3\"],\n #drf-tm-tab4:checked ~ .drf-tab-labels label[for=\"drf-tm-tab4\"],\n #drf-tm-tab5:checked ~ .drf-tab-labels label[for=\"drf-tm-tab5\"],\n #drf-tm-tab6:checked ~ .drf-tab-labels label[for=\"drf-tm-tab6\"] { color: var(--drf-grn); background: var(--drf-grn-light); border-bottom-color: var(--drf-grn); font-weight: 700; }\n #drf-tm-tab1:checked ~ .drf-panels #drf-tm-panel1,\n #drf-tm-tab2:checked ~ .drf-panels #drf-tm-panel2,\n #drf-tm-tab3:checked ~ .drf-panels #drf-tm-panel3,\n #drf-tm-tab4:checked ~ .drf-panels #drf-tm-panel4,\n #drf-tm-tab5:checked ~ .drf-panels #drf-tm-panel5,\n #drf-tm-tab6:checked ~ .drf-panels #drf-tm-panel6 { display: block; }\n\n .drf-callout { background: var(--drf-grn-light); border-left: 3px solid var(--drf-grn); padding: 1em 1.2em; margin: 1.2em 0; border-radius: 0 3px 3px 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: 600; letter-spacing: 0.12em; 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 .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 3px 3px 0; background: var(--drf-grn-light); }\n .drf-mech-num { font-family: 'Cormorant Garamond', serif; font-size: 2em; font-weight: 600; 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; }\n .drf-mech p { font-size: 0.92em; color: #555; margin-bottom: 0; }\n\n .drf-rate { border: 1px solid var(--drf-border); padding: 1em 1.2em; margin: 0.8em 0; border-radius: 3px; background: var(--drf-grn-light); }\n .drf-rate h4 { margin-top: 0; color: var(--drf-grn); text-transform: none; letter-spacing: 0; 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; }\n .drf-rate-meta strong { color: var(--drf-gold); }\n .drf-rate p { font-size: 0.92em; 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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\n .drf-wrap table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: 0.88em; }\n .drf-wrap table th { background: var(--drf-grn); color: #fff; padding: 0.6em 0.8em; text-align: left; font-weight: 600; 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 .drf-wrap table tr:nth-child(odd) td { background: #fff; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"drf-wrap\"\u003e\n\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n \u003cinput type=\"radio\" name=\"drf-tm-tabset\" id=\"drf-tm-tab1\" checked\u003e\n \u003cinput type=\"radio\" name=\"drf-tm-tabset\" id=\"drf-tm-tab2\"\u003e\n \u003cinput type=\"radio\" name=\"drf-tm-tabset\" id=\"drf-tm-tab3\"\u003e\n \u003cinput type=\"radio\" name=\"drf-tm-tabset\" id=\"drf-tm-tab4\"\u003e\n \u003cinput type=\"radio\" name=\"drf-tm-tabset\" id=\"drf-tm-tab5\"\u003e\n \u003cinput type=\"radio\" name=\"drf-tm-tabset\" id=\"drf-tm-tab6\"\u003e\n\n \u003cdiv class=\"drf-tab-labels\"\u003e\n \u003clabel for=\"drf-tm-tab1\"\u003eOverview\u003c\/label\u003e\n \u003clabel for=\"drf-tm-tab2\"\u003eIngredients\u003c\/label\u003e\n \u003clabel for=\"drf-tm-tab3\"\u003eHow to Use\u003c\/label\u003e\n \u003clabel for=\"drf-tm-tab4\"\u003eGrowing Guide\u003c\/label\u003e\n \u003clabel for=\"drf-tm-tab5\"\u003eThe Science\u003c\/label\u003e\n \u003clabel for=\"drf-tm-tab6\"\u003eFAQ\u003c\/label\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"drf-panels\"\u003e\n\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003c!-- TAB 1: OVERVIEW --\u003e\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003cdiv class=\"drf-panel\" id=\"drf-tm-panel1\"\u003e\n \u003ch2\u003eTomato Fertiliser — 3-4-6 NPK, 16 organic ingredients, designed for flavour\u003c\/h2\u003e\n\n \u003cdiv class=\"drf-badge-row\"\u003e\n \u003cspan class=\"drf-badge drf-badge-green\"\u003e3-4-6 NPK\u003c\/span\u003e\n \u003cspan class=\"drf-badge drf-badge-green\"\u003e16 Ingredients\u003c\/span\u003e\n \u003cspan class=\"drf-badge drf-badge-green\"\u003eFlavour Focused\u003c\/span\u003e\n \u003cspan class=\"drf-badge drf-badge-green\"\u003eSlow Release\u003c\/span\u003e\n \u003cspan class=\"drf-badge drf-badge-green\"\u003eNo Slaughterhouse Waste\u003c\/span\u003e\n \u003cspan class=\"drf-badge drf-badge-green\"\u003eHandmade in the UK\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003cp\u003eMost tomato fertilisers are designed around yield. This one is designed around \u003cstrong\u003etaste\u003c\/strong\u003e. The 3-4-6 NPK ratio — with potassium at twice the nitrogen level — is the result of over 30 years of research into what makes tomatoes sweet, aromatic and complex. \u003cstrong\u003eSixteen premium plant-based ingredients\u003c\/strong\u003e including Yorkshire Polyhalite, Scottish Seaweed Meal, British Biochar and Dried Worm Castings deliver a complete slow-release feed that builds the soil as it feeds the plant. Handcrafted in Stockport — no slaughterhouse waste.\u003c\/p\u003e\n \u003cp\u003eThe 2:1 K:N ratio is the single most important nutritional lever for fruit quality. It drives sugar loading into fruit, stimulates lycopene synthesis, and activates the enzymatic pathways for the volatile aromatic compounds that give tomatoes their scent. Peer-reviewed meta-analysis of 313 studies confirms organic fertiliser produces \u003cstrong\u003e72% more aroma volatiles\u003c\/strong\u003e and \u003cstrong\u003e24% more lycopene\u003c\/strong\u003e than mineral alternatives.\u003c\/p\u003e\n\n \u003cdiv class=\"drf-stats\"\u003e\n \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e3-4-6\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eNPK Ratio\u003c\/span\u003e\n\u003c\/div\u003e\n \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e16\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003ePremium Ingredients\u003c\/span\u003e\n\u003c\/div\u003e\n \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e+72%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eMore Aroma Volatiles*\u003c\/span\u003e\n\u003c\/div\u003e\n \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e2:1\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eK:N Ratio\u003c\/span\u003e\n\u003c\/div\u003e\n \u003c\/div\u003e\n \u003cp\u003e\u003cem\u003e*Zhang et al. (2023), meta-analysis of 313 studies. See The Science tab.\u003c\/em\u003e\u003c\/p\u003e\n\n \u003ch3\u003eWhat this formula does for your tomatoes\u003c\/h3\u003e\n \u003cul class=\"drf-uses\"\u003e\n \u003cli\u003e\n\u003cstrong\u003eSweeter, more complex flavour\u003c\/strong\u003e — chloride-free potassium at twice the nitrogen level drives sugar translocation from leaf to fruit, the primary mechanism of Brix, sweetness and flavour intensity\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eDeeper colour, more lycopene\u003c\/strong\u003e — high K and sulphur from Yorkshire Polyhalite stimulate carotenoid biosynthesis, the pathway responsible for both red pigmentation and the carotenoid-derived volatiles that define tomato aroma\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eNo blossom end rot\u003c\/strong\u003e — calcium built into the formula from multiple sources provides the continuous supply that prevents cell wall failure in developing fruit\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eLiving soil biology\u003c\/strong\u003e — British Biochar and Dried Worm Castings introduce beneficial microorganisms that suppress pathogens through competitive exclusion and produce secondary metabolites linked to improved flavour\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eTrace mineral depth\u003c\/strong\u003e — seaweed, basalt rock dust, polyhalite and clay minerals supply zinc, iron, manganese, boron and copper — the enzyme cofactors required to synthesise aroma volatiles\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eLower nitrate in fruit\u003c\/strong\u003e — slow-release organic nitrogen arrives at a rate the plant can fully utilise, producing 30–50% lower nitrate than mineral-fed fruit with cleaner, less bitter taste\u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3\u003eDr Forest Tomato vs liquid tomato feed\u003c\/h3\u003e\n \u003cdiv class=\"drf-compare\"\u003e\n \u003cdiv class=\"drf-compare-box\"\u003e\n \u003ch4\u003eDr Forest Tomato Fertiliser 3-4-6\u003c\/h4\u003e\n \u003cul\u003e\n \u003cli\u003e16 ingredients — full nutritional picture including calcium, sulphur and trace minerals\u003c\/li\u003e\n \u003cli\u003eLiving biology: fermented biochar + worm castings + EM microorganisms\u003c\/li\u003e\n \u003cli\u003eSlow-release organic fractions feed for weeks per application\u003c\/li\u003e\n \u003cli\u003eEvery application permanently improves the growing medium\u003c\/li\u003e\n \u003cli\u003eNo salt accumulation, no EC spike, no chloride\u003c\/li\u003e\n \u003cli\u003eApply every 2–4 weeks — not weekly\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"drf-compare-box\"\u003e\n \u003ch4\u003eTypical Liquid Tomato Feed\u003c\/h4\u003e\n \u003cul\u003e\n \u003cli\u003e3 nutrients — NPK and nothing else\u003c\/li\u003e\n \u003cli\u003eNo calcium — the nutrient that prevents blossom end rot is absent from virtually all liquid tomato feeds\u003c\/li\u003e\n \u003cli\u003eNo living biology — soluble salts suppress beneficial soil organisms\u003c\/li\u003e\n \u003cli\u003eFeast-and-famine cycle — dissolves within hours, leaches by next watering\u003c\/li\u003e\n \u003cli\u003eAdds nothing to soil structure, biology or long-term fertility\u003c\/li\u003e\n \u003cli\u003eSalt and EC build-up in containers and grow bags\u003c\/li\u003e\n \u003cli\u003eWeekly dosing required throughout the season\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eHandcrafted in Stockport\u003c\/span\u003e\u003cp\u003eDr Forest fertilisers are blended in small batches from traceable British ingredients. Named after Joe's grandfather — an NHS GP who believed in doing things properly. No slaughterhouse waste. No shortcuts. Every bag is made to the same standard we use in our own garden.\u003c\/p\u003e\n\u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003c!-- TAB 2: INGREDIENTS --\u003e\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003cdiv class=\"drf-panel\" id=\"drf-tm-panel2\"\u003e\n \u003ch2\u003eAll 16 ingredients — what they do and why they are in the formula\u003c\/h2\u003e\n \u003cp\u003eEvery ingredient is here for a specific, research-backed reason. Nothing is filler. The potassium mineral is mined in North Yorkshire. The seaweed is hand-harvested from Scottish waters. The biochar is British-sourced and fermented before blending. All ingredients are plant-based and free from slaughterhouse by-products.\u003c\/p\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eYorkshire Polyhalite — 🇬🇧 North Yorkshire · Slow release\u003c\/h4\u003e\n\u003cp\u003eSupplies four nutrients from a single crystal: K, Ca, Mg and S. Mined 1,200m below the North Sea. The sulphur fraction directly increases total soluble solids (Brix) in tomatoes — a benefit absent from most organic tomato fertilisers. Releases over 50–60 days, providing sustained background nutrition without salt spikes. \u003cem\u003eJohnston \u0026amp; Dawson, 2018\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\u003ch4\u003eSulphate of Potash (SOP) — Mineral · Immediate release\u003c\/h4\u003e\n\u003cp\u003eFast-acting potassium at 50% K₂O — chloride-free. Activates sugar translocation from leaf to fruit, lycopene synthesis and anthocyanin production immediately. Chloride at high concentrations interferes with lycopene synthesis; no muriate forms are used anywhere in this formula. \u003cem\u003eRömheld \u0026amp; Kirkby, 2010\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\u003ch4\u003eMicronised Magnesium Mineral — Mineral · Sustained release\u003c\/h4\u003e\n\u003cp\u003eMagnesium is the central atom of every chlorophyll molecule — without it, the photosynthesis that produces fruit sugars fails. At 20.9% Mg and 5-micron particle size for rapid uptake. Provides sustained correction for UK soils chronically deficient in Mg. \u003cem\u003eMarschner, 2012\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\u003ch4\u003eNitrogen Plant Extract — Plant-derived · Controlled release\u003c\/h4\u003e\n\u003cp\u003eFast-release organic nitrogen for early vegetative establishment. Plant-derived, mineralising through microbial protease activity without the nitrate spikes associated with synthetic N sources. The controlled-release profile prevents excess nitrogen redirecting energy into foliage at the expense of fruit. \u003cem\u003eMarschner, 2012\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\u003ch4\u003ePhosphorous Plant Meal — Plant-derived · Fast–moderate release\u003c\/h4\u003e\n\u003cp\u003eOrganic phosphorus for root development, energy transfer and fruit set. Undergoes rapid microbial breakdown, releasing P within weeks at the two most critical moments: root establishment after transplanting and bud initiation at flowering. \u003cem\u003eMarschner, 2012\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\u003ch4\u003eRapeseed Meal — 🇬🇧 British · Slow release\u003c\/h4\u003e\n\u003cp\u003eHigh-protein seed meal providing steady nitrogen over 6–8 weeks through microbial protease breakdown. Acts as a prebiotic carbon source for the soil microbial community. The gradual mineralisation avoids the nitrate spikes that suppress fruit set and dilute flavour. \u003cem\u003eJensen, 1994\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e07\u003c\/span\u003e\u003ch4\u003eScottish Seaweed Meal — 🏴󠁧󠁢󠁳󠁣󠁴󠁿 Hand-harvested\u003c\/h4\u003e\n\u003cp\u003eTrace minerals, natural auxins and cytokinins, and alginates for soil structure and stress tolerance. Over 60 trace elements including zinc, iron, manganese and boron — many directly involved in the biosynthesis of volatile aromatic compounds. \u003cem\u003eCraigie, 2011\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e08\u003c\/span\u003e\u003ch4\u003eSeaweed Extract — British coastal · Biostimulant\u003c\/h4\u003e\n\u003cp\u003eConcentrated biostimulant supplying cytokinins that delay fruit and leaf senescence — extending the productive season. Enhances nutrient uptake, flowering and fruit-set under stress. Betaines improve osmotic adjustment under drought. \u003cem\u003eCraigie, 2011\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e09\u003c\/span\u003e\u003ch4\u003eAlfalfa Meal — Plant-based · Slow release · Biostimulant\u003c\/h4\u003e\n\u003cp\u003eContains triacontanol — a natural plant growth regulator that increases chlorophyll content by 15–20% and accelerates meristematic cell division. Increases photosynthate production and partitioning to developing fruit. \u003cem\u003eKhan et al., 2009\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e10\u003c\/span\u003e\u003ch4\u003eBritish Biochar — 🇬🇧 Fermented · Activated\u003c\/h4\u003e\n\u003cp\u003eCreates a permanent, porous carbon scaffold housing beneficial microorganisms. Increases plant-available K retention by 18–35% under leaching conditions — particularly valuable in grow bags and containers. Fermentation activates the surface with beneficial microbial populations before application. \u003cem\u003eLehmann et al., 2011\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e11\u003c\/span\u003e\u003ch4\u003eHumic Acid — Mineral organic · Chelation\u003c\/h4\u003e\n\u003cp\u003eChelates micronutrients — particularly iron and manganese — maintaining them in plant-available form across a wide pH range. Increases total soil bacterial biomass by 30–60% and stimulates mycorrhizal colonisation by 25–40%. \u003cem\u003eNardi et al., 2009\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e12\u003c\/span\u003e\u003ch4\u003eDried Worm Castings — Living biology · Bioavailable nutrients\u003c\/h4\u003e\n\u003cp\u003eA single gram contains hundreds of millions of beneficial organisms. Supplies nutrients in immediately plant-available form while introducing bacteria, fungi and protozoa that activate within days. Worm casting-enriched soil consistently produces fruit with improved flavour and higher Brix even at identical NPK levels.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e13\u003c\/span\u003e\u003ch4\u003eSilica Meal — Mineral · Structural\u003c\/h4\u003e\n\u003cp\u003eSilicon strengthens epidermal cell walls — a physical barrier against aphid stylet penetration, thrip rasping and fungal spore germination. Improves stem rigidity, reducing collapse under heavy truss load. \u003cem\u003eEpstein, 1999\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e14\u003c\/span\u003e\u003ch4\u003eClay Minerals — 🇬🇧 British · Permanent CEC reservoir\u003c\/h4\u003e\n\u003cp\u003eMontmorillonite and illite clays with the highest cation exchange capacity of any soil mineral — ionic reservoirs that bind and slowly release K, Ca and Mg between waterings. Clay CEC is permanent. \u003cem\u003eBarker \u0026amp; Pilbeam, 2015\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e15\u003c\/span\u003e\u003ch4\u003eVolcanic Rock Dust (Basalt) — Mineral · Trace elements\u003c\/h4\u003e\n\u003cp\u003eBroad-spectrum trace elements: zinc for alcohol dehydrogenase activity, iron and copper for oxidative cleavage of carotenoids, manganese for antioxidant enzyme systems. These are the enzyme cofactors required for aroma volatile biosynthesis.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e16\u003c\/span\u003e\u003ch4\u003eHerbal Mixture — Plant-derived · Biostimulant\u003c\/h4\u003e\n\u003cp\u003ePlant-derived biostimulants supplying secondary metabolites that enhance microbial activity and plant resilience. Broad-spectrum biological stimulus for the soil microbial community. \u003cem\u003eZaller \u0026amp; Kopke, 2004\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003c!-- TAB 3: HOW TO USE --\u003e\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003cdiv class=\"drf-panel\" id=\"drf-tm-panel3\"\u003e\n \u003ch2\u003eHow to use tomato fertiliser: rates, timing \u0026amp; method\u003c\/h2\u003e\n\n \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eMeasuring made simple\u003c\/span\u003e\u003cp\u003eThis product is a milled powder with a bulk density of 1 g\/ml — grams and millilitres are interchangeable. You can measure by weight on a kitchen scale or by volume using a measuring jug or spoon. 3 level teaspoons = 1 tablespoon ≈ 15 ml. For best results, mix with an equal volume of compost before applying.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003ch3\u003eStep-by-step: containers and grow bags\u003c\/h3\u003e\n \u003col class=\"drf-steps\"\u003e\n \u003cli\u003e\n\u003cstrong\u003ePrepare your potting mix.\u003c\/strong\u003e Measure 5–10g per litre of compost. 5g\/L for mixes already containing nutrients; 10g\/L for plain or peat-free compost. Mix thoroughly for at least two minutes to prevent localised hot-spots.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eFill your container and plant.\u003c\/strong\u003e Leave 5cm headspace for watering. Set the plant at the correct depth. Firm gently. If planting into an existing container, mix the fertiliser into the compost before transplanting.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWater in thoroughly.\u003c\/strong\u003e Water until it runs freely from drainage holes. This activates the slow-release process. Do not allow the pot to dry completely — organic nutrient release is moisture-dependent.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWait 10–14 days before first top-dress.\u003c\/strong\u003e The initial potting mix dose provides nutrition for the first two to three weeks. Begin top-dressing once plants show new growth.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eTop-dress every 2–4 weeks.\u003c\/strong\u003e Apply 1–3g per litre of pot volume in a band around the outer rim, 10cm from stem. Lightly scratch into the top 2–3cm. Water immediately.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eAdjust based on plant signals.\u003c\/strong\u003e Pale yellowing lower leaves: increase to fortnightly or move toward 3g\/L. Excessively dark green foliage with few flowers: stretch to every 4 weeks and reduce toward 1g\/L.\u003c\/li\u003e\n \u003c\/ol\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eApplication rate table\u003c\/h3\u003e\n\n \u003ch4\u003eContainers \u0026amp; pots\u003c\/h4\u003e\n \u003ctable\u003e\n \u003ctr\u003e\n\u003cth\u003eSituation\u003c\/th\u003e\n\u003cth\u003eRate (g = ml)\u003c\/th\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003ePotting mix preparation\u003c\/td\u003e\n\u003ctd\u003e5–10g per litre of compost\u003c\/td\u003e\n\u003ctd\u003eOnce at potting\u003c\/td\u003e\n\u003ctd\u003e5g\/L in enriched mixes. 10g\/L in plain or peat-free compost.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eContainer top-dressing\u003c\/td\u003e\n\u003ctd\u003e1–3g per litre of pot volume\u003c\/td\u003e\n\u003ctd\u003eEvery 2–4 weeks\u003c\/td\u003e\n\u003ctd\u003e1g\/L for established plants. 2–3g\/L for large containers (20L+) or peak fruiting.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/table\u003e\n\n \u003ch4\u003eOutdoor beds \u0026amp; raised beds\u003c\/h4\u003e\n \u003ctable\u003e\n \u003ctr\u003e\n\u003cth\u003eSituation\u003c\/th\u003e\n\u003cth\u003eRate (g = ml)\u003c\/th\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eBed preparation\u003c\/td\u003e\n\u003ctd\u003e150–200g per m² (up to 250g for depleted soil)\u003c\/td\u003e\n\u003ctd\u003eOnce before planting\u003c\/td\u003e\n\u003ctd\u003eFork into top 10–15cm. Preparing 2–4 weeks in advance allows nutrients to begin releasing.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eOutdoor top-dressing\u003c\/td\u003e\n\u003ctd\u003e75–150g per m²\u003c\/td\u003e\n\u003ctd\u003eEvery 2–4 weeks\u003c\/td\u003e\n\u003ctd\u003e75g\/m² in fertile soil during vegetative growth. 100–150g\/m² during peak fruiting.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSingle plant at transplanting\u003c\/td\u003e\n\u003ctd\u003e30–45g per plant\u003c\/td\u003e\n\u003ctd\u003eOnce at planting\u003c\/td\u003e\n\u003ctd\u003eMix into planting hole with equal volume of soil or compost. 10cm gap from stem.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSingle plant top-dressing\u003c\/td\u003e\n\u003ctd\u003e30–45g per plant\u003c\/td\u003e\n\u003ctd\u003eEvery 2–4 weeks\u003c\/td\u003e\n\u003ctd\u003eRing around the plant 10–15cm from stem. Lightly scratch in. Water in thoroughly.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/table\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eSeasonal feeding guide\u003c\/h3\u003e\n \u003ctable\u003e\n \u003ctr\u003e\n\u003cth\u003eStage\u003c\/th\u003e\n\u003cth\u003eTiming\u003c\/th\u003e\n\u003cth\u003eRate \u0026amp; Frequency\u003c\/th\u003e\n\u003cth\u003eGoal\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eBed preparation \/ potting mix\u003c\/td\u003e\n\u003ctd\u003e2–4 weeks before planting\u003c\/td\u003e\n\u003ctd\u003eBeds: 150–200g\/m². Pots: 5–10g\/L compost\u003c\/td\u003e\n\u003ctd\u003eBuild nutrient-rich root zone before the plant arrives\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eTransplant establishment\u003c\/td\u003e\n\u003ctd\u003eAt planting\u003c\/td\u003e\n\u003ctd\u003e30–45g per plant into planting hole\u003c\/td\u003e\n\u003ctd\u003eLocalised nutrient boost for rapid rooting\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eEarly vegetative growth\u003c\/td\u003e\n\u003ctd\u003e10–14 days after transplanting\u003c\/td\u003e\n\u003ctd\u003e75g\/m² or 1g\/L every 3–4 weeks\u003c\/td\u003e\n\u003ctd\u003eHealthy structure without excessive N-driven bulk\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eActive flowering \u0026amp; fruit set\u003c\/td\u003e\n\u003ctd\u003eFirst flowers through heavy fruit load\u003c\/td\u003e\n\u003ctd\u003e100g\/m² or 2g\/L every 2–3 weeks\u003c\/td\u003e\n\u003ctd\u003eK and P support for flower retention and fruit set\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003ePeak fruit fill\u003c\/td\u003e\n\u003ctd\u003eHeavy green fruit on all trusses\u003c\/td\u003e\n\u003ctd\u003e150g\/m² or 3g\/L every 2 weeks\u003c\/td\u003e\n\u003ctd\u003eMaximum demand — sugar loading and lycopene synthesis\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eRipening \u0026amp; late season\u003c\/td\u003e\n\u003ctd\u003eOnce fruit begins to colour\u003c\/td\u003e\n\u003ctd\u003eLower range or skip; every 3–4 weeks\u003c\/td\u003e\n\u003ctd\u003eConcentrate sugars and volatiles; ease off nitrogen\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/table\u003e\n\n \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with…\u003c\/span\u003e\u003cp\u003eUse \u003cstrong\u003eDr Forest Seaweed Powder\u003c\/strong\u003e as a fortnightly foliar — adds cytokinins and trace minerals without extra nitrogen. Apply \u003cstrong\u003eDr Forest Liquid Gypsum\u003c\/strong\u003e as a root drench if blossom end rot appears mid-season. Use the \u003cstrong\u003eDr Forest All-Purpose 6-6-6\u003c\/strong\u003e during early vegetative establishment before switching to this formula at first flower.\u003c\/p\u003e\n\u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003c!-- TAB 4: GROWING GUIDE --\u003e\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003cdiv class=\"drf-panel\" id=\"drf-tm-panel4\"\u003e\n \u003ch2\u003eTomato growing guide — varieties, training, watering \u0026amp; feeding by type\u003c\/h2\u003e\n\n \u003cp\u003eNot all tomatoes grow the same way, and not all respond to the same feeding and training approach. This guide covers the practical differences between the main variety types grown in the UK — and how to adjust your fertiliser programme, watering, and management to get the best from each one.\u003c\/p\u003e\n\n \u003ch3\u003eThe two growth habits: indeterminate vs determinate\u003c\/h3\u003e\n \u003cp\u003eEvery tomato variety falls into one of two fundamental growth categories. Understanding which you are growing is the single most important decision for training, feeding and watering.\u003c\/p\u003e\n\n \u003cdiv class=\"drf-compare\"\u003e\n \u003cdiv class=\"drf-compare-box\"\u003e\n \u003ch4\u003eIndeterminate (cordon \/ vine)\u003c\/h4\u003e\n \u003cul\u003e\n \u003cli\u003eGrows continuously from a single stem — will not stop until killed by frost\u003c\/li\u003e\n \u003cli\u003eRequires staking, support and regular side-shooting (removing axillary shoots)\u003c\/li\u003e\n \u003cli\u003eProduces trusses sequentially up the stem — harvests over a long season\u003c\/li\u003e\n \u003cli\u003eMost greenhouse and polytunnel varieties are indeterminate\u003c\/li\u003e\n \u003cli\u003eHigher total yield but spread across months\u003c\/li\u003e\n \u003cli\u003eNeeds consistent feeding throughout the season as new trusses form\u003c\/li\u003e\n \u003cli\u003eCommon UK varieties: Gardener's Delight, Sungold, Moneymaker, Ailsa Craig, San Marzano, Costoluto Fiorentino\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"drf-compare-box\"\u003e\n \u003ch4\u003eDeterminate (bush)\u003c\/h4\u003e\n \u003cul\u003e\n \u003cli\u003eGrows to a genetically fixed size, then stops and sets fruit all at once\u003c\/li\u003e\n \u003cli\u003eDoes not need staking in most cases — may need support once fruit is heavy\u003c\/li\u003e\n \u003cli\u003eDo \u003cstrong\u003enot\u003c\/strong\u003e remove side-shoots — each side-shoot produces a truss\u003c\/li\u003e\n \u003cli\u003eProduces a concentrated harvest over 3–5 weeks rather than months\u003c\/li\u003e\n \u003cli\u003eIdeal for outdoor growing, patio containers and hanging baskets\u003c\/li\u003e\n \u003cli\u003eNeeds a strong single feed at planting then lighter maintenance feeding\u003c\/li\u003e\n \u003cli\u003eCommon UK varieties: Roma, Tumbling Tom, Totem, Red Alert, The Amateur, Maskotka\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eSemi-determinate varieties\u003c\/span\u003e\u003cp\u003eA few varieties — notably some paste types — are semi-determinate: they grow to a moderate height (90–120cm), set most of their fruit, then slow substantially without stopping completely. Treat these as indeterminate for training (stake and side-shoot) but feed on the lighter determinate schedule once the majority of trusses have set.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eFeeding adjustments by variety type\u003c\/h3\u003e\n \u003cp\u003eThe 3-4-6 formula is designed for all tomatoes, but the feeding schedule benefits from adjustment depending on what you are growing. The differences relate to fruit size, season length and the metabolic demands of different growth habits.\u003c\/p\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eCherry \u0026amp; cocktail — Sungold, Gardener's Delight, Sweet Million, Tumbling Tom\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e Lower end of range  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 3–4 weeks\u003c\/div\u003e\n\u003cp\u003eSmall fruit with naturally high Brix. Excessive feeding pushes vegetative growth at the expense of flavour. Light and consistent is better than heavy and infrequent. These varieties already concentrate sugars efficiently — overfeed and they produce leaf, not fruit.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eStandard \/ medium — Moneymaker, Ailsa Craig, Alicante, Shirley\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e Mid-range  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 2–3 weeks\u003c\/div\u003e\n\u003cp\u003eThe classic UK greenhouse tomato. Reliable and responsive to the standard feeding schedule. These are the varieties the 3-4-6 ratio was primarily calibrated against. Standard rates, standard timing — follow the How to Use tab directly.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eBeefsteak \u0026amp; large-fruited — Brandywine, Costoluto Fiorentino, Marmande, Coeur de Boeuf\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e Upper end of range  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 2 weeks at peak\u003c\/div\u003e\n\u003cp\u003eLarge fruit means high total mineral demand per fruit. Calcium is critical — BER risk is highest in beefsteak varieties because the expanding cells at the blossom end are growing the fastest. Water consistently. Feed at the upper end. Consider supplemental foliar calcium during rapid fruit expansion.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003ePlum \u0026amp; paste — San Marzano, Roma, Amish Paste, Giulietta\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e Mid-range  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 3 weeks\u003c\/div\u003e\n\u003cp\u003ePaste varieties are bred for high dry matter and low water content — exactly what the 3-4-6 K-led formula supports. Slightly less frequent feeding suits their naturally concentrated fruit. These respond exceptionally well to the low-N, high-K approach — Brix improvements are often the most dramatic in paste types.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eBush \/ determinate — Totem, Red Alert, The Amateur, Maskotka, Tumbling Tom\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e Strong initial charge, lighter top-dressing  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 3–4 weeks\u003c\/div\u003e\n\u003cp\u003eThese set most fruit at once rather than sequentially. Give a strong initial potting mix charge (8–10g\/L) then lighter top-dressing (1–2g\/L). Reduce or stop feeding once the majority of fruit is set — the plant is winding down, not gearing up. Continued heavy feeding after fruit set produces leaf, not better fruit.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eHeritage \u0026amp; heirloom — Brandywine, Black Krim, Green Zebra, Tigerella, Costoluto\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e Mid to upper range  |  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 2–3 weeks\u003c\/div\u003e\n\u003cp\u003eHeritage varieties have retained the genetic capacity for complex flavour that modern commercial varieties have been bred out of. They respond more dramatically to potassium-rich organic feeding than any other group — the flavour improvement from 3-4-6 is most pronounced in these varieties. Often larger-fruited, so calcium attention applies.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eGreenhouse vs outdoor — what changes\u003c\/h3\u003e\n\n \u003cdiv class=\"drf-compare\"\u003e\n \u003cdiv class=\"drf-compare-box\"\u003e\n \u003ch4\u003eGreenhouse \u0026amp; polytunnel\u003c\/h4\u003e\n \u003cul\u003e\n \u003cli\u003eLonger season — typically late April transplant through to October\u003c\/li\u003e\n \u003cli\u003eHigher temperatures accelerate both growth and nutrient demand\u003c\/li\u003e\n \u003cli\u003eIndeterminate varieties can produce 8–12 trusses under glass vs 4–6 outdoors\u003c\/li\u003e\n \u003cli\u003eFeed at the upper end of the range and at the shorter frequency (every 2 weeks during peak)\u003c\/li\u003e\n \u003cli\u003eVentilation is critical — stagnant humid air promotes Botrytis and leaf mould\u003c\/li\u003e\n \u003cli\u003eWater in the morning to allow foliage to dry before evening\u003c\/li\u003e\n \u003cli\u003eBlossom end rot risk is higher because greenhouse temperatures drive rapid transpiration\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003cdiv class=\"drf-compare-box\"\u003e\n \u003ch4\u003eOutdoor growing\u003c\/h4\u003e\n \u003cul\u003e\n \u003cli\u003eShorter season — transplant late May (after last frost), harvest July to September\u003c\/li\u003e\n \u003cli\u003eChoose early-maturing varieties: Sungold, Gardener's Delight, Red Alert, Tumbling Tom\u003c\/li\u003e\n \u003cli\u003eDeterminate varieties are generally more reliable outdoors than indeterminate\u003c\/li\u003e\n \u003cli\u003eFeed at the mid-range and standard frequency (every 3–4 weeks)\u003c\/li\u003e\n \u003cli\u003eRain washes nutrients through the root zone — the organic fractions in this formula resist leaching far better than liquid feeds\u003c\/li\u003e\n \u003cli\u003eOutdoor tomatoes often have superior flavour to greenhouse fruit — UV stress increases lycopene and volatile production\u003c\/li\u003e\n \u003cli\u003eStop indeterminate outdoor varieties at 4–5 trusses to ensure fruit ripens before autumn\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eWatering — the make-or-break factor\u003c\/h3\u003e\n \u003cp\u003eMore tomato problems are caused by inconsistent watering than by any fertiliser deficiency. Erratic moisture — alternating drought and deluge — causes blossom end rot, fruit cracking, poor calcium uptake and uneven ripening. The goal is consistent, deep moisture at the root zone.\u003c\/p\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eContainers \u0026amp; grow bags\u003c\/h4\u003e\n\u003cp\u003eWater daily in warm weather, twice daily in heatwaves. Water slowly until it runs from the base. Never let compost dry completely — once peat-free compost dries out it is very difficult to re-wet evenly. In grow bags, consider burying a plastic bottle with the base cut off next to each plant as a watering funnel — this delivers water directly to the root zone rather than running off the surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\u003ch4\u003eRaised beds \u0026amp; open ground\u003c\/h4\u003e\n\u003cp\u003eWater deeply 2–3 times per week rather than little and often. Shallow daily watering encourages surface roots; deep infrequent watering drives roots down where moisture is more stable. Mulch heavily with compost, straw or grass clippings to a depth of 5–8cm — mulch reduces evaporation, buffers soil temperature, and maintains the consistent moisture that prevents BER.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\u003ch4\u003eGreenhouses\u003c\/h4\u003e\n\u003cp\u003eWater in the morning — wet foliage overnight invites fungal disease. Aim to keep the compost or soil at a consistent 60–70% moisture. Drip irrigation on a timer is the most reliable method under glass. In polytunnels, overhead watering is acceptable outdoors but avoid wetting foliage under cover. Ventilate well after watering to reduce humidity.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eThe calcium connection\u003c\/span\u003e\u003cp\u003eCalcium is delivered to fruit exclusively via the transpiration stream — water moving from roots through stems to leaves and fruit. When transpiration is disrupted by drought stress, calcium delivery to the fastest-growing cells at the blossom end of the fruit stops. This is why blossom end rot is a watering problem as much as a nutrition problem. The calcium in this formula can only prevent BER if watering is consistent.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eTraining indeterminate (cordon) varieties\u003c\/h3\u003e\n \u003col class=\"drf-steps\"\u003e\n \u003cli\u003e\n\u003cstrong\u003eStake or string at transplanting.\u003c\/strong\u003e Insert a sturdy cane or tie a string from the greenhouse roof before the plant needs it. Trying to support a heavy, floppy plant later risks stem damage and root disturbance.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRemove side-shoots weekly.\u003c\/strong\u003e Axillary shoots appear in the angle between the main stem and each leaf. Pinch them out when small (5–8cm) using your thumb and forefinger. Removing them when they are larger wastes the plant's energy and creates a bigger wound. Check every 3–4 days during rapid growth.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStop the plant at the right time.\u003c\/strong\u003e In a greenhouse, allow 6–8 trusses before pinching out the growing tip — this is typically in late July or early August. Outdoors, stop at 4–5 trusses by early July to give fruit time to ripen before autumn. Stopping redirects all remaining energy into ripening the existing fruit rather than producing more that will not mature.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRemove lower leaves progressively.\u003c\/strong\u003e Once the lowest truss has been picked, remove all leaves below it. This improves airflow, reduces humidity around the base of the plant, and helps prevent Botrytis and soil-splash diseases. Do not remove more than three leaves in a single session.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eTie in as the plant grows.\u003c\/strong\u003e Loosely tie the stem to the support every 20–30cm as it grows. Use soft twine or commercial plant clips — never wire. The tie should support, not constrict. Leave room for stem expansion.\u003c\/li\u003e\n \u003c\/ol\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eUK seasonal timeline\u003c\/h3\u003e\n \u003ctable\u003e\n \u003ctr\u003e\n\u003cth\u003eMonth\u003c\/th\u003e\n\u003cth\u003eWhat to Do\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eFebruary–March\u003c\/td\u003e\n\u003ctd\u003eSow seed indoors on a warm windowsill or heated propagator at 18–21°C. Use a fine seed compost. Do not sow too early — leggy seedlings perform worse than sturdy ones sown later.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eApril\u003c\/td\u003e\n\u003ctd\u003ePot on seedlings into 9cm pots when they have their first true leaves. Harden off gradually if growing outdoors. Prepare greenhouse beds or grow bags with a base charge of Dr Forest Tomato Fertiliser (150–200g\/m² or 5–10g\/L).\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMay\u003c\/td\u003e\n\u003ctd\u003eTransplant into final positions. Greenhouse: late April to early May. Outdoors: after last frost, typically late May in most of England. Apply 30–45g per planting hole. Stake and begin training.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eJune\u003c\/td\u003e\n\u003ctd\u003eFirst flowers appear. Begin fortnightly or three-weekly top-dressing. Side-shoot regularly. Water consistently. The first truss sets — this is when potassium demand begins to increase.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eJuly\u003c\/td\u003e\n\u003ctd\u003ePeak feeding period — fruit swelling on multiple trusses. Feed every 2 weeks at the upper end of the range. Stop outdoor cordons at 4–5 trusses. Greenhouse cordons can continue to 6–8 trusses. Remove lower leaves below picked trusses.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eAugust\u003c\/td\u003e\n\u003ctd\u003eFirst ripe fruit. Reduce feeding frequency to every 3–4 weeks. Ease off watering slightly as fruit colours — mild water stress at this stage concentrates sugars and intensifies flavour. Stop greenhouse cordons at 6–8 trusses if not already done.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSeptember–October\u003c\/td\u003e\n\u003ctd\u003eHarvest remaining fruit. Green fruit can be ripened indoors on a windowsill or in a drawer with a banana (ethylene). Pull plants once productive life is over. The biochar and organic matter left in the soil will benefit next season's crop.\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/table\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eCommon problems and what to do\u003c\/h3\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eBlossom end rot\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eCause:\u003c\/strong\u003e Inconsistent watering disrupting calcium delivery  |  \u003cstrong\u003eNot caused by:\u003c\/strong\u003e Low soil calcium in most cases\u003c\/div\u003e\n\u003cp\u003eWater consistently and deeply. Mulch to buffer moisture. This formula includes calcium from multiple sources — supplemental Dr Forest Liquid Gypsum as a root drench can help in severe cases. Remove affected fruit; subsequent trusses usually recover once watering is stabilised.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFruit splitting and cracking\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eCause:\u003c\/strong\u003e Sudden heavy watering or rain after a dry spell\u003c\/div\u003e\n\u003cp\u003eThe fruit skin hardens during drought and cannot expand fast enough when the plant suddenly takes up water. Prevention: consistent watering, mulching, and the strong cell walls that adequate calcium and silicon provide. Pick fruit at first sign of cracking — it will still ripen and is safe to eat.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eYellow lower leaves\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eCause:\u003c\/strong\u003e Usually nitrogen or magnesium deficiency — or natural senescence\u003c\/div\u003e\n\u003cp\u003eIf only the oldest leaves are yellowing, the plant is redirecting nutrients into developing fruit — this is normal. If yellowing is widespread or interveinal (veins green, leaf blade yellow), it is likely magnesium deficiency — this formula includes two magnesium sources, but a foliar spray of Epsom salt (10g per litre) provides a quick correction.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLots of leaf, few flowers\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eCause:\u003c\/strong\u003e Excess nitrogen, too much shade, or temperatures consistently above 35°C\u003c\/div\u003e\n\u003cp\u003eReduce feeding frequency. Do not add supplemental nitrogen feeds. Ensure the plant is getting 6+ hours of direct sun. In greenhouses, ventilate to prevent temperatures exceeding 30°C — pollen viability declines rapidly above this and fruit set fails. The 3-4-6 K-led ratio is designed to prevent this problem; if it occurs, the plant is being overfed.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eBlight (Phytophthora infestans)\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eCause:\u003c\/strong\u003e Fungal spore spread in warm, wet conditions — usually late summer outdoors\u003c\/div\u003e\n\u003cp\u003eGreenhouse growing largely avoids blight. Outdoors, choose blight-resistant varieties (Crimson Crush, Mountain Magic, Fantasio) if blight is recurrent in your area. Remove and dispose of affected foliage immediately — do not compost. The silica and seaweed in this formula strengthen cell walls and prime SAR pathways, providing a degree of structural resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eGreenback and uneven ripening\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eCause:\u003c\/strong\u003e Potassium deficiency, excessive direct sun on fruit, or high temperature\u003c\/div\u003e\n\u003cp\u003eGreenback — hard, green or yellow patches on the shoulder of the fruit that never ripen — is strongly associated with K deficiency and is one of the problems the 3-4-6 high-K formula directly addresses. Ensure leaves shade the fruit from direct sun in greenhouses. This rarely occurs when feeding consistently with a K-led formula.\u003c\/p\u003e\n\u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003c!-- TAB 5: THE SCIENCE --\u003e\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003cdiv class=\"drf-panel\" id=\"drf-tm-panel5\"\u003e\n \u003ch2\u003eThe science of tomato flavour — and why fertiliser is decisive\u003c\/h2\u003e\n \u003cp\u003eTomato flavour is the result of three chemical systems operating simultaneously inside the ripening fruit: \u003cstrong\u003esugars\u003c\/strong\u003e (fructose and glucose, sensed as sweetness), \u003cstrong\u003eorganic acids\u003c\/strong\u003e (citric and malic acid, sensed as sharpness and complexity), and \u003cstrong\u003evolatile organic compounds\u003c\/strong\u003e (VOCs) perceived as aroma. The balance between these three determines whether a tomato tastes flat and watery or rich, complex and intense.\u003c\/p\u003e\n \u003cp\u003eOf the three, volatiles are the most sensitive to nutrition. A 2023 meta-analysis of 313 studies found organic fertiliser increased aromatic volatile content by \u003cstrong\u003e72.1%\u003c\/strong\u003e compared to mineral controls — consistent across dozens of individual trials (Zhang et al., 2023).\u003c\/p\u003e\n\n \u003ch3\u003eWhy the 3-4-6 ratio works\u003c\/h3\u003e\n \u003cp\u003eThe K:N ratio of 2:1 is the single most important nutritional lever for fruit quality. Research across multiple decades consistently identifies a K:N ratio of 1.5–2:1 as optimal for maximising Brix, aromatic volatile production, lycopene synthesis and sensory scores. The 3-4-6 ratio delivers exactly 2:1.\u003c\/p\u003e\n\n \u003cdiv class=\"drf-stats\"\u003e\n \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003eN 3%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eLow — prevents dilution\u003c\/span\u003e\n\u003c\/div\u003e\n \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003eP 4%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eRoot \u0026amp; fruit set\u003c\/span\u003e\n\u003c\/div\u003e\n \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003eK 6%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eChloride-free · Flavour driver\u003c\/span\u003e\n\u003c\/div\u003e\n \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e2:1\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eK:N ratio\u003c\/span\u003e\n\u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eThe potassium-flavour connection\u003c\/h3\u003e\n \u003cp\u003eK is the primary driver of phloem loading — the transport of sugars from leaves to fruit. Under K deficiency, fruit is lower in Brix, lower in vitamin C, and lower in the volatile compounds that give tomatoes their scent. All K in this formula is chloride-free — SOP and Yorkshire Polyhalite. Chloride interferes with lycopene synthesis.\u003c\/p\u003e\n\n \u003ch3\u003eKey aroma compounds\u003c\/h3\u003e\n \u003ctable\u003e\n \u003ctr\u003e\n\u003cth\u003eCompound\u003c\/th\u003e\n\u003cth\u003eSensory Character\u003c\/th\u003e\n\u003cth\u003eNutritional Link\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003e6-Methyl-5-hepten-2-one\u003c\/td\u003e\n\u003ctd\u003eClassic \"tomato\" aroma\u003c\/td\u003e\n\u003ctd\u003eFrom lycopene cleavage — proportional to lycopene content; organic produces +24–53% more\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eβ-Ionone\u003c\/td\u003e\n\u003ctd\u003eFloral, violet, fruity\u003c\/td\u003e\n\u003ctd\u003eFrom β-carotene; enzyme activity depends on iron and copper from trace-mineral-rich inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eGeranylacetone\u003c\/td\u003e\n\u003ctd\u003eFruity, rose-like\u003c\/td\u003e\n\u003ctd\u003eFrom lycopene via carotenoid degradation; enhanced by high-K growing conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eβ-Damascenone\u003c\/td\u003e\n\u003ctd\u003eSweet, rose, cooked fruit\u003c\/td\u003e\n\u003ctd\u003eFrom carotenoid precursors; suppressed by excess nitrogen\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eHexanal \u0026amp; (Z)-3-hexenal\u003c\/td\u003e\n\u003ctd\u003eGreen, grassy, \"just-picked\"\u003c\/td\u003e\n\u003ctd\u003eLipoxygenase pathway requires iron and zinc; highest in outdoor soil-grown tomatoes\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/table\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eWhy organic outperforms mineral — the mechanisms\u003c\/h3\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eMicrobial metabolite production\u003c\/h4\u003e\n\u003cp\u003eDecomposing organic ingredients produce secondary metabolites — short-chain organic acids, amino acid derivatives and enzyme cofactors — directly involved in volatile organic compound biosynthesis. An organic fertiliser feeds the plant and its entire biochemical environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\u003ch4\u003eLower nitrate = better taste\u003c\/h4\u003e\n\u003cp\u003eOrganic nitrogen arrives at a rate the plant can fully utilise. Result: 30–50% lower nitrate in fruit. \u003cem\u003eCardarelli et al., 2023\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\u003ch4\u003eTrace mineral completeness for aroma biosynthesis\u003c\/h4\u003e\n\u003cp\u003eZinc for alcohol dehydrogenase, iron and copper for oxidative cleavage of carotenoids, manganese for antioxidant enzymes — supplied by seaweed, basalt, polyhalite and clay.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\u003ch4\u003eSoil biology and disease suppression\u003c\/h4\u003e\n\u003cp\u003eOrganic fertilisers reduce disease incidence by 45–73% by building the microbial community that outcompetes pathogens. \u003cem\u003eZhang et al., 2023\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\u003ch4\u003eCarotenoid biosynthesis\u003c\/h4\u003e\n\u003cp\u003eLycopene is the direct precursor to the most important aroma volatiles. Organic systems produce 24–53% higher lycopene. More lycopene means richer colour and more complex aroma. \u003cem\u003eGao et al., 2023; Hao et al., 2020\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\u003ch4\u003eGene expression under organic management\u003c\/h4\u003e\n\u003cp\u003eAll 21 starch and sucrose metabolism genes are upregulated under organic fertilisation — the genetic pathway responsible for sugar accumulation in fruit. \u003cem\u003eLi et al., 2024\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e07\u003c\/span\u003e\u003ch4\u003eCombined organic–mineral highest quality\u003c\/h4\u003e\n\u003cp\u003eGlobal meta-analysis of 7,859 data pairs: combined organic + mineral improved yield by ~31% and nutritional quality by ~12%. \u003cem\u003eWang et al., 2023\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e08\u003c\/span\u003e\u003ch4\u003eLong-term soil improvement\u003c\/h4\u003e\n\u003cp\u003eEvery application adds organic matter, biochar carbon, living microorganisms and minerals. Over successive seasons: increased CEC, improved moisture retention, deeper structure for root penetration, and rising microbial diversity.\u003c\/p\u003e\n\u003c\/div\u003e\n\n \u003chr class=\"drf-sep\"\u003e\n \u003ch3\u003eStudy data: organic fertilisation and tomato quality\u003c\/h3\u003e\n \u003ctable\u003e\n \u003ctr\u003e\n\u003cth\u003eStudy\u003c\/th\u003e\n\u003cth\u003eFinding\u003c\/th\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eZhang et al. (2023) — 313 studies, 9,752 observations\u003c\/td\u003e\n\u003ctd\u003e+72.1% aroma volatiles, +12% sugars, −16.9% nitrate, −73% disease, +24% lycopene\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eGao et al. (2023) — 107 studies\u003c\/td\u003e\n\u003ctd\u003e+19% vitamin C, +24% lycopene with organic fertilisation\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eWang et al. (2024) — 67 VOCs measured by GC-MS\u003c\/td\u003e\n\u003ctd\u003eOrganic: 35.38 μg\/g total volatiles — highest across all treatment groups\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eHao et al. (2020) — greenhouse tomato\u003c\/td\u003e\n\u003ctd\u003e+24.1% sugar, +53% lycopene, +129% total carotenoids, +20% yield\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eJavaria et al. (2012) — potassium dose trials\u003c\/td\u003e\n\u003ctd\u003eOptimal K significantly increased sweetness, aroma and Brix\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eTieman et al. (2017) — 398 accessions\u003c\/td\u003e\n\u003ctd\u003e13 key volatiles for consumer preference; modern varieties have lower concentrations\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003c\/table\u003e\n\n \u003cdiv class=\"drf-refs\"\u003e\n\u003ch4\u003eReferences\u003c\/h4\u003e\n\u003col\u003e\n \u003cli\u003eBarker, A.V. \u0026amp; Pilbeam, D.J. eds. (2015). \u003cem\u003eHandbook of Plant Nutrition\u003c\/em\u003e, 2nd ed. CRC Press.\u003c\/li\u003e\n \u003cli\u003eButtery, R.G. et al. (1987). Fresh tomato aroma volatiles. \u003cem\u003eJ. Agric. Food Chem.\u003c\/em\u003e, 35, 540–544.\u003c\/li\u003e\n \u003cli\u003eCardarelli, M. et al. (2023). Nitrate accumulation: organic vs conventional. \u003cem\u003eAgronomy\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eCraigie, J.S. (2011). Seaweed extract stimuli. \u003cem\u003eJ. Applied Phycology\u003c\/em\u003e, 23(3), 371–393.\u003c\/li\u003e\n \u003cli\u003eEpstein, E. (1999). Silicon. \u003cem\u003eAnnual Review of Plant Physiology\u003c\/em\u003e, 50, 641–664.\u003c\/li\u003e\n \u003cli\u003eGao, H. et al. (2023). Organic fertilizers and tomato quality. \u003cem\u003eApplied Sciences\u003c\/em\u003e, 13.\u003c\/li\u003e\n \u003cli\u003eHao, X. et al. (2020). Composted organic waste and tomato carotenoids. \u003cem\u003eJ. Integrative Agriculture\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eJavaria, S. et al. (2012). Potassium and tomato sensory attributes. \u003cem\u003eSelcuk University\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eJensen, E.S. (1994). Plant meal N mineralisation. \u003cem\u003eSoil Biology and Biochemistry\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eJohnston, A.E. \u0026amp; Dawson, C.J. (2018). Polyhalite as a fertiliser. \u003cem\u003eProc. 826, Int. Fertiliser Society\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eKhan, A.A. et al. (2009). Triacontanol. \u003cem\u003ePlant Growth Regulation\u003c\/em\u003e, 53(3), 203–218.\u003c\/li\u003e\n \u003cli\u003eKlee, H.J. \u0026amp; Tieman, D.M. (2018). Genetics of fruit flavour. \u003cem\u003eNature Reviews Genetics\u003c\/em\u003e, 19(6), 347–356.\u003c\/li\u003e\n \u003cli\u003eLehmann, J. et al. (2011). Biochar effects on soil biota. \u003cem\u003eSoil Biology and Biochemistry\u003c\/em\u003e, 43(9), 1812–1836.\u003c\/li\u003e\n \u003cli\u003eLi, Y. et al. (2024). Starch\/sucrose gene expression under organic management. \u003cem\u003eNature Scientific Reports\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eMarschner, P. ed. (2012). \u003cem\u003eMarschner's Mineral Nutrition of Higher Plants\u003c\/em\u003e, 3rd ed. Academic Press.\u003c\/li\u003e\n \u003cli\u003eNardi, S. et al. (2009). Humic substances. \u003cem\u003eSoil Biology and Biochemistry\u003c\/em\u003e, 34(11), 1527–1536.\u003c\/li\u003e\n \u003cli\u003eRömheld, V. \u0026amp; Kirkby, E.A. (2010). Potassium in agriculture. \u003cem\u003ePlant and Soil\u003c\/em\u003e, 335(1–2), 155–180.\u003c\/li\u003e\n \u003cli\u003eTieman, D. et al. (2017). Improved tomato flavor. \u003cem\u003eScience\u003c\/em\u003e, 355(6323), 391–394.\u003c\/li\u003e\n \u003cli\u003eWang, Y. et al. (2023). Combined organic–mineral meta-analysis. \u003cem\u003eScience of the Total Environment\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eWang, Y. et al. (2024). Organic fertilizer effects on tomato VOCs. \u003cem\u003eFrontiers in Plant Science\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eZaller, J.G. \u0026amp; Kopke, U. (2004). Herbal preparations. \u003cem\u003ePlant and Soil\u003c\/em\u003e.\u003c\/li\u003e\n \u003cli\u003eZhang, X. et al. (2023). Organic fertilizer in tomato quality: meta-analysis. \u003cem\u003eScientia Horticulturae\u003c\/em\u003e.\u003c\/li\u003e\n \u003c\/ol\u003e\n\u003c\/div\u003e\n \u003c\/div\u003e\n\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003c!-- TAB 6: FAQ --\u003e\n \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n \u003cdiv class=\"drf-panel\" id=\"drf-tm-panel6\"\u003e\n \u003ch2\u003eFrequently asked questions about tomato fertiliser\u003c\/h2\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq1\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq1\"\u003eHow soon will I notice a difference compared to liquid tomato feed?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eThe plant appearance change is gradual — organic slow-release builds soil health over weeks rather than producing the immediate green flush of a liquid nitrogen hit. The difference you will notice most clearly is in the fruit: richer colour, deeper aroma when picked, and noticeably sweeter, more complex flavour. The 72% increase in aromatic volatiles operates through biological pathways that take several weeks to fully activate.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq2\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq2\"\u003eCan I use this in peat-free compost?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — and this formula is particularly valuable in peat-free compost, which typically has lower initial nutrient levels. Use the higher potting mix rate (8–10g\/L) and begin top-dressing after 7–10 days rather than 14. Combining with a liquid seaweed foliar spray every 2 weeks provides strong results.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq3\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq3\"\u003eWhy does this fertiliser have less nitrogen than other tomato feeds?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eExcess nitrogen produces large, watery fruit with low Brix, reduced lycopene and minimal volatile production. The 3% N is sufficient for healthy foliage without producing the excess that suppresses fruiting and dilutes quality. If plants show nitrogen deficiency, apply more frequently within the recommended rates rather than adding a high-N feed on top.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq4\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq4\"\u003eWhat is polyhalite and why is it in a tomato fertiliser?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003ePolyhalite is a Yorkshire-mined mineral supplying K, Ca, Mg and S from a single crystal. For tomatoes: K drives Brix and lycopene; Ca prevents blossom end rot; Mg is essential for photosynthesis; S directly increases total soluble solids and is a cofactor for flavour-related enzyme systems. It releases over 50–60 days, providing sustained background nutrition.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq5\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq5\"\u003eWill it prevent blossom end rot?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eCalcium is included to maintain background supply. BER is primarily a water-stress disorder — consistent moisture is as important as calcium. For severe or recurring cases, supplement with Dr Forest Liquid Gypsum as a root drench every 2–3 weeks once fruit is setting. Remove affected fruit; subsequent trusses usually recover once watering is stabilised.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq6\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq6\"\u003eHow does this work with mycorrhizal fungi inoculant?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eExcellent combination — use the lower potting rate (5g\/L) initially to avoid high P inhibiting colonisation. Apply the inoculant directly to roots or into the planting hole. Resume normal rates after 3–4 weeks once networks have formed.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq7\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq7\"\u003eCan I use this for peppers, chillies and other fruiting veg?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — peppers, aubergines and chillies respond well to the same 3-4-6 ratio. For a wider range of crops including root veg, brassicas and soft fruit, the Dr Forest Fruit \u0026amp; Vegetable 4-5-6 offers a more versatile NPK balance.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq8\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq8\"\u003eCan I use Dr Forest alongside a liquid feed?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — the two are complementary. Dr Forest provides the slow-release foundation; a supplemental liquid seaweed or calcium feed can top up nutrients during peak demand. Avoid replacing the dry base programme with liquid alone.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq9\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq9\"\u003eDo cherry tomatoes need different feeding to beefsteaks?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — see the Growing Guide tab for detailed variety-specific adjustments. Cherry varieties need lighter, less frequent feeding (they concentrate sugars naturally and overfeed produces leaf, not fruit). Beefsteaks need the upper end of the rate range with extra attention to calcium and consistent watering because their large, fast-expanding fruit is most vulnerable to BER.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq10\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq10\"\u003eShould I feed differently in a greenhouse vs outdoors?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes. Greenhouse plants have a longer season, higher temperatures and greater nutrient demand. Feed at the upper end of the range at the shorter frequency (every 2 weeks during peak). Outdoor plants generally need the mid-range at standard frequency (every 3–4 weeks). See the Growing Guide tab for detailed guidance.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq11\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq11\"\u003eWhat do the biochar and worm castings do?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eBritish Biochar creates permanent porous habitat for beneficial microorganisms and increases K retention by 18–35%. Worm castings introduce living biology — a single gram contains hundreds of millions of organisms. Together they improve flavour and Brix even at identical NPK levels because it is the microbial community, not just the nutrients, that drives quality.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq12\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq12\"\u003eIs it safe for edible crops, pets and children?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes. All plant-based organic ingredients with no synthetic chemicals, no slaughterhouse by-products and no persistent toxins. No withholding period for edible crops. Safe for pets and children once applied and watered in.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq13\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq13\"\u003eIs it organic?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eThe product is made from organic and natural ingredients — plant meals, mined minerals, seaweed, biochar and worm castings. It is not certified organic. No synthetic chemicals, no slaughterhouse waste, no GMO inputs.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-tm-faq14\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-tm-faq14\"\u003eHow should I store the fertiliser?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eCool, dry place out of direct sunlight. Keep sealed between uses — exposure to moisture activates microbial populations prematurely. Effective for at least 18 months. If clumped, break up before measuring — still useable.\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":"1.5kg (750gx2)","offer_id":56705813741942,"sku":null,"price":11.5,"currency_code":"GBP","in_stock":true},{"title":"4kg","offer_id":56705813774710,"sku":null,"price":23.5,"currency_code":"GBP","in_stock":true},{"title":"9kg","offer_id":56705813807478,"sku":null,"price":44.0,"currency_code":"GBP","in_stock":true},{"title":"15kg","offer_id":56967929889142,"sku":null,"price":60.49,"currency_code":"GBP","in_stock":true},{"title":"30kg","offer_id":56967931462006,"sku":null,"price":120.0,"currency_code":"GBP","in_stock":true},{"title":"60kg","offer_id":56967932739958,"sku":null,"price":225.0,"currency_code":"GBP","in_stock":true},{"title":"120kg","offer_id":56967933559158,"sku":null,"price":420.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/premium-tomato-fertiliser-two-brown-compostable-paper-bags-193.webp?v=1774913530","url":"https:\/\/www.drforest.co.uk\/products\/organic-tomato-fertiliser","provider":"Dr Forest","version":"1.0","type":"link"}