{"product_id":"organic-fruit-vegetable-fertiliser","title":"Organic Fruit \u0026 Vegetable Fertiliser UK | 4-5-6 NPK","description":"\u003c!-- Dr Forest — Fruit \u0026 Vegetable Fertiliser 4-5-6 Product Page --\u003e\n\u003c!-- 5-tab layout: Overview | Ingredients | How to Use | The Science | FAQ --\u003e\n\u003c!-- Prefix: drf-fv- --\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; 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}\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-fv-tabset\" id=\"drf-fv-tab1\" checked\u003e\n  \u003cinput type=\"radio\" name=\"drf-fv-tabset\" id=\"drf-fv-tab2\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-fv-tabset\" id=\"drf-fv-tab3\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-fv-tabset\" id=\"drf-fv-tab4\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-fv-tabset\" id=\"drf-fv-tab5\"\u003e\n\n  \u003cdiv class=\"drf-tab-labels\"\u003e\n    \u003clabel for=\"drf-fv-tab1\"\u003eOverview\u003c\/label\u003e\n    \u003clabel for=\"drf-fv-tab2\"\u003eIngredients\u003c\/label\u003e\n    \u003clabel for=\"drf-fv-tab3\"\u003eHow to Use\u003c\/label\u003e\n    \u003clabel for=\"drf-fv-tab4\"\u003eThe Science\u003c\/label\u003e\n    \u003clabel for=\"drf-fv-tab5\"\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-fv-panel1\"\u003e\n    \u003ch2\u003eFruit \u0026amp; vegetable fertiliser — 4-5-6 NPK with 19 ingredients, British sourced, made with certified organic ingredients\u003c\/h2\u003e\n\n    \u003cdiv class=\"drf-badge-row\"\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e4-5-6 NPK\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e19 Ingredients\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eDual Fast \u0026amp; Slow Release\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eBritish Ingredients\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\"\u003eCompostable Packaging\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cp\u003eA \u003cstrong\u003eslow-release organic coarse powder\u003c\/strong\u003e formulated for the full range of kitchen garden crops — tomatoes, peppers, courgettes, root vegetables, brassicas, soft fruit and beans. The \u003cstrong\u003e4-5-6 NPK ratio is potassium-led\u003c\/strong\u003e for high-quality produce, with elevated phosphorus for root development and nitrogen calibrated to sustain growth without pushing foliage at the expense of fruit. Handcrafted in Stockport from \u003cstrong\u003ecertified organic ingredients\u003c\/strong\u003e — no slaughterhouse waste, no bone meal, no blood.\u003c\/p\u003e\n    \u003cp\u003eBoth primary plant-meal ingredients are sourced from Cambridgeshire. The potassium mineral is mined exclusively in North Yorkshire. The seaweed is hand-harvested from Scottish coastal waters. The biochar is British-sourced and fermented before blending. \u003cstrong\u003eNineteen synergistic ingredients\u003c\/strong\u003e deliver an immediate mineral fraction that begins working within days, and a slow-release organic fraction that builds soil biology across a full season.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-stats\"\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e4-5-6\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\"\u003e19\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eIngredients\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e6.2%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCalcium (3 sources)\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e5.4%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eSulphur (4 sources)\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3\u003eWhat it does across your kitchen garden\u003c\/h3\u003e\n    \u003cul class=\"drf-uses\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eBigger, sweeter harvests\u003c\/strong\u003e — chloride-free potassium at the highest level in the formula drives sugar transport from leaf to fruit, the primary mechanism of fruit size, sweetness and flavour complexity\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eNo blossom end rot\u003c\/strong\u003e — 6.2% calcium from three sources (Gypsum, Polyhalite, Phosphorous Rich Plant Meal) provides continuous calcium that prevents cell wall failure in developing tomatoes and peppers\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eDeeper flavour\u003c\/strong\u003e — high K and triacontanol from Alfalfa Meal increase secondary metabolites responsible for sweetness, aroma and complexity in home-grown produce\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eRoots that feed the harvest\u003c\/strong\u003e — two Cambridgeshire plant-based phosphorus sources at different speeds ensure P supply is uninterrupted from transplant through to the last fruits of the season\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eChlorophyll through August\u003c\/strong\u003e — two magnesium sources at different release rates prevent the mid-season interveinal yellowing that cuts short the productive life of fruiting plants\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eA richer soil every year\u003c\/strong\u003e — British fermented biochar, humic \u0026amp; fulvic acid, EM microorganisms and Scottish seaweed improve the growing environment with every application\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eDr Forest Fruit \u0026amp; Veg vs liquid tomato feed\u003c\/h3\u003e\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eDr Forest Fruit \u0026amp; Vegetable 4-5-6\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003e19 ingredients — full nutritional picture, not just NPK\u003c\/li\u003e\n          \u003cli\u003e6.2% calcium from three sources — most liquid feeds contain zero calcium\u003c\/li\u003e\n          \u003cli\u003eSlow-release organic fractions feed for 6–8 weeks per application\u003c\/li\u003e\n          \u003cli\u003eOne top-dress every 4 weeks replaces weekly liquid dosing\u003c\/li\u003e\n          \u003cli\u003eFermented biochar, EM and humic acid permanently improve the soil\u003c\/li\u003e\n          \u003cli\u003eNo salt accumulation, no EC spike, no chloride\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\u003c\/li\u003e\n          \u003cli\u003eFeast-and-famine cycle — dissolves within hours, leaches by next watering\u003c\/li\u003e\n          \u003cli\u003eWeekly dosing required throughout the season\u003c\/li\u003e\n          \u003cli\u003eNo soil improvement — refreshes the medium but never builds it\u003c\/li\u003e\n          \u003cli\u003eSalt and EC build-up in containers and grow bags\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-fv-panel2\"\u003e\n    \u003ch2\u003eAll 19 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. Both primary plant meals are sourced from Cambridgeshire. 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.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eNitrogen Plant Extract — 🇬🇧 Cambridgeshire · 28% of blend\u003c\/h4\u003e\n\u003cp\u003eThe primary nitrogen carrier at 12% N, mineralising through microbial protease activity over 6–8 weeks. Also contributes 3% P and 4% K. The controlled-release profile is critical for fruiting crops: a nitrogen spike at fruit set redirects energy into foliage at the expense of fruit development. \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\"\u003e02\u003c\/span\u003e\u003ch4\u003ePhosphorous Rich Plant Meal — 🇬🇧 Cambridgeshire · 15% of blend\u003c\/h4\u003e\n\u003cp\u003eThe primary fast-acting phosphorus source at 15% P and 7% Ca. Undergoes rapid microbial breakdown, releasing phosphorus within weeks — addressing the two most critical P-demand moments: root establishment after transplanting, and bud initiation at flowering. Same Cambridgeshire supplier as the Nitrogen Plant Extract. \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\"\u003e03\u003c\/span\u003e\u003ch4\u003eYorkshire Polyhalite — 🇬🇧 North Yorkshire · Slow release 50–60 days\u003c\/h4\u003e\n\u003cp\u003eA uniquely British mineral supplying four nutrients from a single crystal: 14% K₂O, 17% CaO, 6% MgO and 48% SO₃. Mined 1,200m below the North Sea. Extends the K feeding window by 50–60 days after SOP's immediate release is exhausted — critical for sustained fruit development across a long season. \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\"\u003e04\u003c\/span\u003e\u003ch4\u003eSulphate of Potash (SOP) — Mineral · Immediate release\u003c\/h4\u003e\n\u003cp\u003eFast-release potassium at 50% K₂O — chloride-free. Muriate of potash causes tip burn and osmotic stress in fruit crops; its chloride content negatively affects flavour in tomatoes and soft fruit. SOP activates stomatal regulation, sugar transport and anthocyanin production immediately, bridging the gap before Polyhalite's slower K release builds. \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\"\u003e05\u003c\/span\u003e\u003ch4\u003eGypsum (Calcium Sulphate) — Mineral · 8% of blend\u003c\/h4\u003e\n\u003cp\u003eDual-function mineral: 23.3% calcium and 18.6% sulphur in immediately plant-available sulphate form. Calcium is immobile in the phloem and must be continuously supplied to developing fruit; deficiency causes blossom end rot. Delivers Ca without raising soil pH — safe across all UK soil types. \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\"\u003e06\u003c\/span\u003e\u003ch4\u003eMicronised Rock Phosphate — Mineral · Slow reserve\u003c\/h4\u003e\n\u003cp\u003eThe most concentrated P and Ca source in the formula at 31% P₂O₅ and 30% Ca, but dissolves slowly as a long-term reserve. Micronisation dramatically increases surface area. Works with Phosphorous Rich Plant Meal: the plant meal handles early P demand; this mineral handles the final stretch when the last trusses are swelling in August. \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\"\u003e07\u003c\/span\u003e\u003ch4\u003eRapeseed Meal — 🇬🇧 British · Slow release\u003c\/h4\u003e\n\u003cp\u003eHigh-protein plant meal providing steady slow-release 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 flavour development in fruiting crops. \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\"\u003e08\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. Particularly valuable in containers and grow bags where leaching through drainage is the primary cause of mid-season nutrient loss. Unlike organic matter, 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\"\u003e09\u003c\/span\u003e\u003ch4\u003eMealworm Frass — Sustainably reared · SAR activator\u003c\/h4\u003e\n\u003cp\u003eContains chitin — the polymer found in fungal cell walls and insect exoskeletons. Plants detect it as a signal of pest presence and upregulate Systemic Acquired Resistance (SAR) pathways, priming defences against Pythium, Botrytis, powdery mildew and other common fruit and vegetable pathogens. Also supplies trace minerals and slow-release N and P. \u003cem\u003eAranega-Bou et al., 2014\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\u003eHerbal Mixture — Comfrey · Nettle · Yarrow · Chamomile\u003c\/h4\u003e\n\u003cp\u003eA traditional British fertility blend validated by modern soil science. Comfrey is exceptionally K-rich and breaks down rapidly. Nettle supplies iron and silica. Yarrow promotes phosphorus-solubilising bacteria. Chamomile releases calcium and supports beneficial rhizobacteria colonisation. Together they provide broad-spectrum biological stimulus. \u003cem\u003eZaller \u0026amp; Kopke, 2004\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\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. Consistently reduces pest damage in fruiting crops and improves stem rigidity, reducing collapse under heavy fruit load. Silicon is not present in most UK garden soils at sufficient concentrations. \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\"\u003e12\u003c\/span\u003e\u003ch4\u003eSeaweed Extracts — British coastal · Biostimulant\u003c\/h4\u003e\n\u003cp\u003eConcentrated seaweed extract supplying cytokinins that delay fruit and leaf senescence — extending the productive season. Betaines improve osmotic adjustment under drought and heat stress. Mannitol feeds beneficial rhizobacteria. Natural auxins drive lateral root proliferation during the high-demand fruiting phase. \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\"\u003e13\u003c\/span\u003e\u003ch4\u003eEM Microorganisms — Effective Microorganisms · Living culture\u003c\/h4\u003e\n\u003cp\u003eA consortium of beneficial bacteria, yeasts, actinomycetes and lactic acid bacteria. Suppresses pathogens through competitive exclusion, accelerates decomposition of organic matter, and produces vitamins and bioactive compounds that promote root growth. In fruiting crops, EM consistently improves secondary metabolite production — the flavour and aroma compounds. \u003cem\u003eHiga \u0026amp; Parr, 1994\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\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 the rate of photosynthate production and partitioning to developing fruit. Also supplies 2.5% N, 1.4% Ca and trace minerals as it decomposes. \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\"\u003e15\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, photosynthesis and fruit sugar production fails. At 20.9% Mg it is the highest-concentration Mg source in the formula, providing sustained correction for UK soils that are chronically Mg-deficient according to the DEFRA Countryside Survey (2016). \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\"\u003e16\u003c\/span\u003e\u003ch4\u003eMagnesium Sulphate — Mineral · Immediate release\u003c\/h4\u003e\n\u003cp\u003eThe fastest-acting magnesium source at 16.7% Mg and 13% S in immediately plant-available sulphate form. Addresses interveinal chlorosis within days — critical during the rapid early-season growth phase when Mg demand peaks. Bridges the gap from day one while Micronised Magnesium Mineral builds through the season. \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\"\u003e17\u003c\/span\u003e\u003ch4\u003eScottish Seaweed — 🏴󠁧󠁢󠁳󠁣󠁴󠁿 Hand-harvested\u003c\/h4\u003e\n\u003cp\u003eProvides cytokinins that delay leaf senescence, betaines that improve osmotic adjustment, and mannitol as a carbon source for beneficial rhizobacteria. Delays the plant's natural transition from fruiting to senescence, extending the productive season. Auxins drive lateral root proliferation during the high-demand fruiting phase. \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\"\u003e18\u003c\/span\u003e\u003ch4\u003eFermented Biochar — 🇬🇧 British · Activated\u003c\/h4\u003e\n\u003cp\u003eBritish-sourced agricultural biochar, fermented and activated before blending. Creates a permanent, porous mineral scaffold that retains water and nutrients between waterings — particularly valuable in grow bags and containers. Fermentation activates the surface with beneficial microbial populations. Increases plant-available K retention by 18–35% under leaching conditions. \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\"\u003e19\u003c\/span\u003e\u003ch4\u003eHumic Acid \u0026amp; Fulvic Acid — Mineral organic · Chelation\u003c\/h4\u003e\n\u003cp\u003eComplementary chelation and root-stimulation effects. Humic acid chelates micronutrients — particularly iron and manganese — and increases total soil bacterial biomass by 30–60% while stimulating mycorrhizal colonisation by 25–40%. Fulvic acid penetrates root cell membranes directly, increasing permeability to nutrient ions during the rapid growth and fruiting phases. \u003cem\u003eNardi et al., 2009; Zandonadi et al., 2010\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-fv-panel3\"\u003e\n    \u003ch2\u003eHow to use fruit \u0026amp; vegetable fertiliser: rates, timing \u0026amp; method\u003c\/h2\u003e\n\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eDosages calibrated for 4-5-6 NPK\u003c\/span\u003e\u003cp\u003eAll g\/m² rates assume even surface incorporation to 2–3cm depth. For new beds, borders or containers being set up for the first time, apply at double the standard rate as an initial base charge and work into the full soil depth before planting.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003eStep-by-step application\u003c\/h3\u003e\n    \u003col class=\"drf-steps\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWater first.\u003c\/strong\u003e Ensure soil or compost is moist before applying. Never apply to bone-dry soil — the mineral fraction requires moisture to dissolve and reach the root zone. If very dry, water thoroughly and allow to drain for 30 minutes.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSprinkle evenly over the root zone.\u003c\/strong\u003e Distribute across the full root area — not just at the stem base. For containers, sprinkle across the entire compost surface. Avoid direct contact with leaves, stems and developing fruit.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eLightly fork in.\u003c\/strong\u003e Incorporate into the top 2–3cm of soil or compost. In pots a finger or small hand fork is ideal. In open ground, a border fork or hoe. Avoid deep incorporation — the biology is concentrated in the top layer.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWater in thoroughly.\u003c\/strong\u003e Water within 24 hours of application. In containers, water until it runs freely from the base. In open ground, apply before rain when possible.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n    \u003ch3\u003eFruiting vegetables\u003c\/h3\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n\u003cth\u003ePlant\u003c\/th\u003e\n\u003cth\u003eRate per m²\u003c\/th\u003e\n\u003cth\u003eFrequency \u0026amp; Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTomatoes\u003c\/td\u003e\n\u003ctd\u003e80–120g\u003c\/td\u003e\n\u003ctd\u003eEvery 4 weeks from first flower through to end of harvest. Apply at planting, then begin top-dressing when the first truss sets.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePeppers \u0026amp; Chillies\u003c\/td\u003e\n\u003ctd\u003e75–110g\u003c\/td\u003e\n\u003ctd\u003eEvery 4 weeks. High-K feeding is particularly important for pepper flavour development and capsaicin production.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCourgettes \u0026amp; Summer Squash\u003c\/td\u003e\n\u003ctd\u003e80–120g\u003c\/td\u003e\n\u003ctd\u003eEvery 4–5 weeks. Heavy K feeders — flavour and skin quality both improve markedly with adequate K.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWinter Squash \u0026amp; Pumpkins\u003c\/td\u003e\n\u003ctd\u003e80–110g\u003c\/td\u003e\n\u003ctd\u003eEvery 5 weeks through to August, then stop to allow hardening and sugaring of the skin before harvest.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCucumbers\u003c\/td\u003e\n\u003ctd\u003e75–100g\u003c\/td\u003e\n\u003ctd\u003eEvery 4 weeks. The 6.2% Ca in this formula prevents bitter fruits and hollow cores.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRunner \u0026amp; French Beans\u003c\/td\u003e\n\u003ctd\u003e55–70g\u003c\/td\u003e\n\u003ctd\u003eEvery 5–6 weeks. Legumes fix atmospheric nitrogen — the high K and P support pod fill without adding unwanted N.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePeas\u003c\/td\u003e\n\u003ctd\u003e30–45g\u003c\/td\u003e\n\u003ctd\u003eEvery 6–8 weeks. As N-fixers, peas need minimal added N. Elevated K and P supports pod development.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSweetcorn\u003c\/td\u003e\n\u003ctd\u003e80–110g\u003c\/td\u003e\n\u003ctd\u003eAt planting then every 4 weeks until tassels appear. Reduces to every 6 weeks once silk has been pollinated.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003eRoot vegetables\u003c\/h3\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n\u003cth\u003ePlant\u003c\/th\u003e\n\u003cth\u003eRate per m²\u003c\/th\u003e\n\u003cth\u003eFrequency \u0026amp; Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePotatoes\u003c\/td\u003e\n\u003ctd\u003e100–150g\u003c\/td\u003e\n\u003ctd\u003eAt planting, then every 4 weeks until foliage begins to die back — 4 applications minimum, 5 for a long-season maincrop. Upper rate (130–150g) noticeably improves tuber bulk.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCarrots\u003c\/td\u003e\n\u003ctd\u003e60–75g\u003c\/td\u003e\n\u003ctd\u003eAt sowing, then every 5–6 weeks. Lower N prevents excessive forking and hairy root development; K drives sugar content and colour intensity.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBeetroot \u0026amp; Turnips\u003c\/td\u003e\n\u003ctd\u003e65–80g\u003c\/td\u003e\n\u003ctd\u003eEvery 5 weeks. K and P drive root swelling and sugar accumulation.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOnions \u0026amp; Garlic\u003c\/td\u003e\n\u003ctd\u003e65–80g\u003c\/td\u003e\n\u003ctd\u003eAt planting, then at 5–6 weeks, then at 10–12 weeks. Stop entirely once bulbs begin to swell visibly — excess nutrition prevents proper curing.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eLeeks\u003c\/td\u003e\n\u003ctd\u003e70–110g\u003c\/td\u003e\n\u003ctd\u003eEvery 4–5 weeks. Long-season crop with high nutrient demand. Moderate N prevents excess leaf at the expense of shank development.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003eSoft fruit\u003c\/h3\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n\u003cth\u003ePlant\u003c\/th\u003e\n\u003cth\u003eRate per m²\u003c\/th\u003e\n\u003cth\u003eTiming \u0026amp; Notes\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eStrawberries\u003c\/td\u003e\n\u003ctd\u003e65–100g\u003c\/td\u003e\n\u003ctd\u003eMarch and after the first flush. K drives improved flavour and colour in the second and third flushes.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRaspberries\u003c\/td\u003e\n\u003ctd\u003e70–110g\u003c\/td\u003e\n\u003ctd\u003eMarch, June and post-harvest (August–September). Three applications required for a full-season cane crop.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBlackcurrants \u0026amp; Redcurrants\u003c\/td\u003e\n\u003ctd\u003e90–130g\u003c\/td\u003e\n\u003ctd\u003eMarch, June and post-harvest. Blackcurrants have the highest nutrient demand of all common soft fruit — three applications at the upper end are the minimum.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGooseberries\u003c\/td\u003e\n\u003ctd\u003e80–120g\u003c\/td\u003e\n\u003ctd\u003eMarch and after fruiting (July–August). High K improves dessert gooseberry sweetness and colour. Upper rate recommended for established bushes.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eBlueberries\u003c\/td\u003e\n\u003ctd\u003e65–90g\u003c\/td\u003e\n\u003ctd\u003eMarch and June. A third application in August at 70–80g maintains berry size into late harvest. Acidify soil separately to pH 4.5–5.5.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n    \u003ch3\u003eSoil mix — charging compost at planting\u003c\/h3\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n\u003cth\u003eSituation\u003c\/th\u003e\n\u003cth\u003eRate\u003c\/th\u003e\n\u003cth\u003eMethod\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eContainers \u0026amp; pots\u003c\/td\u003e\n\u003ctd\u003e4–6g per litre\u003c\/td\u003e\n\u003ctd\u003eMix evenly through the full volume before potting\u003c\/td\u003e\n\u003ctd\u003e4g\/L in compost already containing nutrients. 6g\/L in plain or peat-free mixes.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGrow bags (40–50L)\u003c\/td\u003e\n\u003ctd\u003e150–200g per bag\u003c\/td\u003e\n\u003ctd\u003eMix thoroughly throughout the full bag before planting\u003c\/td\u003e\n\u003ctd\u003e150g for bags with nutrients. 200g for plain bags.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRaised beds \u0026amp; borders\u003c\/td\u003e\n\u003ctd\u003e100–120g per m²\u003c\/td\u003e\n\u003ctd\u003eFork into the top 15–20cm before planting\u003c\/td\u003e\n\u003ctd\u003eDouble the standard top-dress rate as a single pre-season application.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSingle plant at transplanting\u003c\/td\u003e\n\u003ctd\u003e15–25g per plant\u003c\/td\u003e\n\u003ctd\u003eMix into the planting hole before placing the rootball\u003c\/td\u003e\n\u003ctd\u003e15g for small transplants. 25g for larger rootballs or hungry crops like tomatoes.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n\n    \u003ch3\u003eTop dressing — feeding through the season\u003c\/h3\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n\u003cth\u003eSituation\u003c\/th\u003e\n\u003cth\u003eRate\u003c\/th\u003e\n\u003cth\u003eFrequency\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eContainers (per litre of pot volume)\u003c\/td\u003e\n\u003ctd\u003e2–3g per litre\u003c\/td\u003e\n\u003ctd\u003eEvery 4 weeks\u003c\/td\u003e\n\u003ctd\u003eApply to compost surface, fork in lightly, water in thoroughly.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGrow bags (40–50L)\u003c\/td\u003e\n\u003ctd\u003e60–90g per bag\u003c\/td\u003e\n\u003ctd\u003eEvery 4 weeks from first flower\u003c\/td\u003e\n\u003ctd\u003eFor tomatoes and peppers, start top-dressing when first truss sets.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eOutdoor beds \u0026amp; raised beds\u003c\/td\u003e\n\u003ctd\u003e80–100g per m²\u003c\/td\u003e\n\u003ctd\u003eEvery 4–6 weeks\u003c\/td\u003e\n\u003ctd\u003e4 weeks for heavy feeders. 5–6 weeks for soft fruit and root veg.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSingle plant top-dressing\u003c\/td\u003e\n\u003ctd\u003e10–15g per plant\u003c\/td\u003e\n\u003ctd\u003eEvery 4 weeks\u003c\/td\u003e\n\u003ctd\u003eDistribute around the full root zone, not at the stem.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/table\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eSeasonal timing\u003c\/span\u003e\u003cp\u003eMid-March to end of August for most crops. Soil must be above 8°C for organic N fractions to mineralise — typically mid-to-late March in most of the UK. The mineral K and Ca fractions activate as soon as the soil is moist. Stop when fruit begins ripening in earnest.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with…\u003c\/span\u003e\u003cp\u003eUse \u003cstrong\u003eDr Forest Seaweed Powder\u003c\/strong\u003e as a fortnightly foliar or drench — adds cytokinins without extra nitrogen load. Apply \u003cstrong\u003eDr Forest Amino Acid Calcium\u003c\/strong\u003e as a targeted foliar spray if blossom end rot appears mid-season. Use the \u003cstrong\u003eDr Forest All-Purpose 6-6-6\u003c\/strong\u003e during the vegetative establishment phase 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: THE SCIENCE                                  --\u003e\n  \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-fv-panel4\"\u003e\n    \u003ch2\u003eThe science behind the 4-5-6 formula\u003c\/h2\u003e\n    \u003cp\u003eThe 4-5-6 ratio reflects the nutrient withdrawal pattern of actively fruiting plants as documented in peer-reviewed tissue analysis across hundreds of crop species. The scientific case for a lower-N, higher-K formula in fruiting crops is extensive, consistent across independent research groups, and routinely ignored by mainstream products designed for maximum leafy yield rather than fruit quality.\u003c\/p\u003e\n\n    \u003ch3\u003eWhy the specific ratio works\u003c\/h3\u003e\n    \u003cp\u003eAs plants transition from vegetative growth to fruit development, relative potassium demand increases substantially — K is the primary driver of phloem loading, the process by which sugars are transported from leaves to developing fruit. Simultaneously, relative nitrogen demand decreases: the plant has established its canopy and needs to sustain it, not expand it. Phosphorus demand remains high throughout.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-stats\"\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003eN 4%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eSustained, not spiked\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003eP 5%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eDual sources\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\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003eCa 6.2%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003e3 sources\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. Plants under K deficiency produce fruit lower in soluble solids (Brix), lower in vitamin C, and measurably lower in the volatile aromatic compounds that give tomatoes, peppers, strawberries and other produce their characteristic smell and taste. All potassium in this formula is chloride-free — Sulphate of Potash and Yorkshire Polyhalite. Chloride at high concentrations interferes with the synthesis of lycopene in tomatoes and anthocyanins in soft fruit.\u003c\/p\u003e\n\n    \u003ch3\u003eCalcium: three sources, one continuous supply\u003c\/h3\u003e\n    \u003cp\u003eBlossom end rot is a calcium deficiency disorder: calcium fails to reach developing fruit tissue quickly enough, and cell walls in rapidly expanding cells collapse. The cause is rarely low soil calcium — UK soils typically have adequate Ca. The cause is inadequate Ca \u003cem\u003eavailability\u003c\/em\u003e at the moment the fruit needs it. Three sources at different release speeds solve this: Gypsum for immediate sulphate-form Ca; Yorkshire Polyhalite for sustained supply across 50–60 days; Micronised Rock Phosphate for long-term reserve. Together: 6.2% total calcium with continuous availability.\u003c\/p\u003e\n\n    \u003ch3\u003eThe 3:1:3 Ca:Mg:K balance\u003c\/h3\u003e\n    \u003cp\u003eCalcium, magnesium and potassium compete for root uptake through shared cation transport channels. Excess K suppresses Mg uptake; excess Ca suppresses K uptake. The formula maintains a 3:1:3 Ca:Mg:K ratio — the design target validated by Hoagland solution benchmarks and supported by extensive tissue analysis showing that K:Mg antagonism is the biologically meaningful constraint in fruiting-crop nutrition.\u003c\/p\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n    \u003ch3\u003eDual-speed release\u003c\/h3\u003e\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eImmediate mineral fraction (days 1–14)\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eSulphate of Potash — 50% K₂O, immediately soluble\u003c\/li\u003e\n          \u003cli\u003eGypsum — 23.3% Ca, 18.6% S in sulphate form\u003c\/li\u003e\n          \u003cli\u003eMagnesium Sulphate — 16.7% Mg, immediately available\u003c\/li\u003e\n          \u003cli\u003ePhosphorous Rich Plant Meal — rapid microbial P release\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eSlow-release organic fraction (weeks 3–10+)\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eNitrogen Plant Extract — 6–8 week mineralisation\u003c\/li\u003e\n          \u003cli\u003eYorkshire Polyhalite — 50–60 day K, Ca, Mg, S release\u003c\/li\u003e\n          \u003cli\u003eRapeseed Meal — slow protease-driven N release\u003c\/li\u003e\n          \u003cli\u003eMicronised Rock Phosphate — months-long P and Ca reserve\u003c\/li\u003e\n          \u003cli\u003eMicronised Magnesium Mineral — sustained Mg correction\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n    \u003ch3\u003eWhy dry organic outperforms liquid synthetic\u003c\/h3\u003e\n    \u003cp\u003eLiquid feeds work on a feast-and-famine cycle — nutrients dissolve and become available within hours, then leach through drainage before the plant can fully intercept them. The finely ground organic fractions in this formula release continuously over weeks through microbial breakdown. But the differences extend well beyond release kinetics.\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eNo calcium.\u003c\/strong\u003e Most liquid tomato feeds contain zero calcium — the nutrient that prevents blossom end rot and determines cell wall integrity in every developing fruit.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eNo soil biology.\u003c\/strong\u003e Synthetic salt solutions contribute nothing to the microbial community. This formula deposits fermented biochar, EM microorganisms and humic acid with every application.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eEC and salt accumulation.\u003c\/strong\u003e Mineral salt feeds progressively raise electrical conductivity in containers and grow bags. Organic fractions do not.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eLeaching losses.\u003c\/strong\u003e Soluble mineral salts pass straight through drainage. The organic fractions and biochar physically resist leaching.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n    \u003ch3\u003eMeta-analysis evidence\u003c\/h3\u003e\n\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eCombined organic–mineral produces highest quality\u003c\/h4\u003e\n\u003cp\u003eGlobal meta-analysis of 7,859 data pairs: combined NPK plus organic sources improved yield by ~31% and nutritional quality (sugars, vitamin C, carotenoids) by ~12% on average, with vegetables and fruits highly responsive. \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\"\u003e02\u003c\/span\u003e\u003ch4\u003eOrganic increases biomass while maintaining biodiversity\u003c\/h4\u003e\n\u003cp\u003eAnalysis of 537 experiments: organic management increased biomass by 56% while maintaining biodiversity; inorganic management increased biomass by 42% but with measurable biodiversity loss. \u003cem\u003eXu et al., 2024, Nature Communications\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\u003eLower nitrate accumulation in organic produce\u003c\/h4\u003e\n\u003cp\u003eNitrate concentrations 27–50% lower in organically grown produce compared with synthetic-fed controls — a consistent finding across multiple independent research groups. \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\"\u003e04\u003c\/span\u003e\u003ch4\u003eSoil enzyme activity under organic management\u003c\/h4\u003e\n\u003cp\u003eUrease activity +38.3%, β-glucosidase +122.4%, with yield increases of 15–20% under organic nutrient management compared with mineral-only controls. \u003cem\u003eLiu et al., 2021\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\u003eBalanced NPK protects microbial diversity\u003c\/h4\u003e\n\u003cp\u003eBalanced NPK application prevents 23–31% actinobacterial loss documented in unbalanced fertilisation regimes — the microbial community responsible for antibiotic production and organic matter decomposition. \u003cem\u003eShen 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\"\u003e06\u003c\/span\u003e\u003ch4\u003eGene expression under organic management\u003c\/h4\u003e\n\u003cp\u003eAll 21 starch and sucrose metabolism genes upregulated under organic fertilisation compared with mineral-only controls — the genetic pathway responsible for sugar accumulation in fruit. \u003cem\u003eLi et al., 2024, Nature Scientific Reports\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\u003eSoil organic carbon under organic inputs\u003c\/h4\u003e\n\u003cp\u003eSoil organic carbon +12.9% under organic management vs mineral-only; +20.6% under no-till organic systems. SOC is the primary driver of long-term soil fertility and water-holding capacity. \u003cem\u003eFerro et al., 2022\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\u003e160 years of evidence at Rothamsted\u003c\/h4\u003e\n\u003cp\u003eThe Park Grass experiment (1856–present) at Rothamsted Research is the world's longest-running grassland trial. Organic plots show continuous improvement in soil quality; mineral-only plots show progressive decline. The direction of travel over 160 years is unambiguous.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n    \u003ch3\u003eBalanced formula vs high-nitrogen approach\u003c\/h3\u003e\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eK-led balanced formula (4-5-6)\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eSugar transport to fruit maximised through phloem loading\u003c\/li\u003e\n          \u003cli\u003eHigher Brix, vitamin C and flavour volatiles in harvested produce\u003c\/li\u003e\n          \u003cli\u003e30–50% lower nitrate accumulation in fruit tissue\u003c\/li\u003e\n          \u003cli\u003eStronger cell walls — fewer cracked tomatoes and soft fruit\u003c\/li\u003e\n          \u003cli\u003eSoil biology supported and improved with every application\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eHigh-N approach (7-3-3 or similar)\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eExcess N redirects photosynthate to leaf and stem production\u003c\/li\u003e\n          \u003cli\u003eLater fruit set, slower ripening, lower Brix\u003c\/li\u003e\n          \u003cli\u003eHigh nitrate concentrations dilute flavour intensity\u003c\/li\u003e\n          \u003cli\u003eWeaker cell walls — more fruit splitting and blossom end rot\u003c\/li\u003e\n          \u003cli\u003eFavours vegetative bulk over reproductive quality\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\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\u003eCardarelli, M. et al. (2023). Nitrate accumulation in vegetables: organic vs conventional. \u003cem\u003eAgronomy\u003c\/em\u003e.\u003c\/li\u003e\n      \u003cli\u003eCraigie, J.S. (2011). Seaweed extract stimuli in plant science and agriculture. \u003cem\u003eJ. Applied Phycology\u003c\/em\u003e, 23(3), 371–393.\u003c\/li\u003e\n      \u003cli\u003eDEFRA \/ CEH (2016). Countryside Survey: Soil Chemical Properties Technical Report.\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\u003eFerro, N.D. et al. (2022). Soil organic carbon changes under organic vs mineral management. \u003cem\u003eAgric. Ecosyst. Environ.\u003c\/em\u003e\n\u003c\/li\u003e\n      \u003cli\u003eHiga, T. \u0026amp; Parr, J.F. (1994). Effective Microorganisms and sustainable agriculture. INFRC.\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: new journey of an old growth regulator. \u003cem\u003ePlant Growth Regulation\u003c\/em\u003e, 53(3), 203–218.\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 and sucrose gene expression under organic management. \u003cem\u003eNature Scientific Reports\u003c\/em\u003e.\u003c\/li\u003e\n      \u003cli\u003eLiu, Z. et al. (2021). Soil enzyme activity under organic nutrient management. \u003cem\u003eSoil \u0026amp; Tillage Research\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). Physiological effects of 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). Research on potassium in agriculture. \u003cem\u003ePlant and Soil\u003c\/em\u003e, 335(1–2), 155–180.\u003c\/li\u003e\n      \u003cli\u003eShen, W. et al. (2024). Balanced NPK and actinobacterial diversity. \u003cem\u003eApplied Soil Ecology\u003c\/em\u003e.\u003c\/li\u003e\n      \u003cli\u003eWang, Y. et al. (2023). Combined organic–mineral fertilisation meta-analysis (7,859 data pairs). \u003cem\u003eScience of the Total Environment\u003c\/em\u003e.\u003c\/li\u003e\n      \u003cli\u003eXu, H. et al. (2024). Organic vs inorganic management: biomass and biodiversity (537 experiments). \u003cem\u003eNature Communications\u003c\/em\u003e.\u003c\/li\u003e\n      \u003cli\u003eZandonadi, D.B. et al. (2010). Humic acids and lateral root development. \u003cem\u003ePlant Biology\u003c\/em\u003e, 12(6), 881–882.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n  \u003c!-- TAB 5: FAQ                                          --\u003e\n  \u003c!-- ═══════════════════════════════════════════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-fv-panel5\"\u003e\n    \u003ch2\u003eFrequently asked questions about fruit \u0026amp; vegetable fertiliser\u003c\/h2\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq1\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq1\"\u003eWhen should I switch from an all-purpose fertiliser to this formula?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eSwitch when your plants transition from vegetative growth to flowering and fruiting — typically when the first flower buds appear. For tomatoes, peppers and cucumbers this is usually 4–6 weeks after transplanting. You can use this formula from the start for crops like potatoes, carrots and onions where root development is the goal from planting.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq2\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq2\"\u003eHow often should I apply throughout the fruiting season?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eEvery 4 weeks for heavy fruit crops like tomatoes, peppers and courgettes. Every 5–6 weeks for soft fruit and root vegetables. The slow-release organic fractions feed for 6–8 weeks, so more frequent application adds no benefit. Reduce to every 6 weeks once the main harvest is well underway — stop feeding entirely in the last 4 weeks of the season.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq3\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq3\"\u003eWhy is this formula K-heavy rather than N-heavy?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003ePotassium is the nutrient most directly responsible for fruit quality: sugar content, colour development, cell wall strength, flavour complexity and volatile aromatic compounds. The nitrogen is calibrated for the range — sufficient for brassicas and root vegetables. It is the elevated, chloride-free potassium that distinguishes it. Research consistently shows K-led nutrition increases Brix, vitamin C and flavour volatiles while reducing nitrate accumulation.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq4\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq4\"\u003eWill it prevent blossom end rot in tomatoes and peppers?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes, when applied consistently. The formula supplies 6.2% calcium from three sources at different release speeds. Applied every 4 weeks this creates continuous calcium supply that prevents cell wall failure. Important: calcium reaches fruit via the transpiration stream, so drought stress and erratic watering will cause BER even in calcium-rich soil. Consistent deep watering is as important as the calcium supply itself.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq5\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq5\"\u003eCan I use it for tomatoes and peppers in grow bags?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — and this formula is particularly well-suited to grow bag culture. Charge at 150–200g per bag before planting, then top-dress at 60–90g per bag every 4 weeks from first flower. The fermented biochar and humic acid are especially valuable in grow bags, where limited compost volume means nutrients leach faster. Biochar increases K retention by 18–35% under leaching conditions.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq6\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq6\"\u003eWhy does it contain two different phosphorus sources?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eBecause P demand is not constant. Phosphorous Rich Plant Meal breaks down rapidly through microbial activity, delivering P within weeks — at exactly the moment roots are establishing and buds are initiating. Micronised Rock Phosphate dissolves slowly over months as a long-term reserve. Together they create an unbroken phosphorus supply from planting to the last fruit.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq7\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq7\"\u003eWhat makes this better than a liquid tomato feed?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eLiquid feeds dissolve and leach within hours. This formula's organic fractions release continuously over weeks — one application every four weeks replaces weekly liquid dosing. Unlike any liquid feed, every application also deposits fermented biochar, EM microorganisms and humic acid, permanently improving the growing medium. Most critically: liquid tomato feeds contain no calcium.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq8\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq8\"\u003eIs it suitable for soft fruit like strawberries and raspberries?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — the 4-5-6 profile is well-suited to soft fruit. Moderate nitrogen, good phosphorus for root development and bud initiation, and high potassium for fruit size, sugar content and anthocyanin production. Apply at 70–85g\/m² in March, June and post-harvest for raspberries and currants; March and after the first flush for strawberries.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq9\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq9\"\u003eWill it improve the taste of my produce?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — measurably. High potassium drives production of sugars, volatile aromatic compounds and anthocyanins. Research shows 30–50% lower nitrate in organically grown produce, with increases in Brix, flavour volatiles and antioxidants. Alfalfa Meal provides triacontanol which increases secondary metabolite production. The difference is most pronounced in tomatoes, peppers, strawberries and beetroot.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq10\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq10\"\u003eCan I use it on leafy vegetables as well?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYou can, though the Dr Forest All-Purpose 6-6-6 is better matched to crops harvested for foliage. This formula is calibrated for fruit, seed, root and tuber crops. For brassicas, lettuce, spinach and other crops where maximum leaf production is the goal, the 6-6-6 is a better choice. This formula will not harm leafy crops — it simply will not push leaf growth as aggressively.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq11\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq11\"\u003eHow much area does a bag cover?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eA 750g bag covers approximately 7–9m² at the standard top-dressing rate of 80–100g\/m², or charges around 125–185 litres of container compost at 4–6g per litre. In practice: a 750g bag top-dresses five standard grow bags per application, or maintains one 1m² raised bed of tomatoes through a full season with three or four applications.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq12\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq12\"\u003eIs it certified organic?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eThe product is made with certified organic ingredients — several of which hold individual OMRI, Soil Association or equivalent certification. The finished product is not currently submitted under a single whole-product certification scheme. What goes into the bag is certified organic material; the product as a whole does not yet carry a certification mark.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq13\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq13\"\u003eIs it safe for bees, pollinators and beneficial insects?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes. All ingredients are organic and mineral in origin — no synthetic insecticides, neonicotinoids or chemical coatings. The seaweed and Alfalfa Meal fractions actively support pollinator health by improving plant vigour and floral volatile production. Apply to the soil surface and water in before flowering to avoid dust contact with visiting pollinators.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-fv-faq14\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-fv-faq14\"\u003eCan I use it alongside other Dr Forest products?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes — this formula is designed as the nutritional foundation for fruiting crops. Most effective pairings: Dr Forest Seaweed Powder as a fortnightly foliar or drench adds cytokinins without extra nitrogen; Amino Acid Calcium as a targeted foliar if blossom end rot appears mid-season; the All-Purpose 6-6-6 during vegetative establishment before switching to this formula at first flower. Avoid combining with high-nitrogen liquid feed in the same week as a top-dressing.\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","offer_id":41868362809531,"sku":null,"price":11.5,"currency_code":"GBP","in_stock":false},{"title":"4kg","offer_id":41868362875067,"sku":null,"price":23.5,"currency_code":"GBP","in_stock":true},{"title":"9kg","offer_id":41868362907835,"sku":null,"price":44.0,"currency_code":"GBP","in_stock":true},{"title":"15kg","offer_id":44784890085563,"sku":null,"price":60.49,"currency_code":"GBP","in_stock":true},{"title":"30kg","offer_id":44784893886651,"sku":null,"price":120.0,"currency_code":"GBP","in_stock":true},{"title":"60kg","offer_id":57055578751350,"sku":null,"price":225.0,"currency_code":"GBP","in_stock":true},{"title":"120g","offer_id":57087545049462,"sku":null,"price":420.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/premium-fruit-vegetable-fertiliser-two-brown-kraft-paper-bags-902.webp?v=1774911967","url":"https:\/\/www.drforest.co.uk\/products\/organic-fruit-vegetable-fertiliser","provider":"Dr Forest","version":"1.0","type":"link"}