{"product_id":"organic-late-bloom-fertiliser","title":"Late Bloom Fertiliser 0-5-10 | Organic PK","description":"\u003c!-- Dr Forest — Late Bloom 0.2-5-10 Flavour \u0026 Terpene Finisher Product Page --\u003e\u003c!-- Prefix: lb — 5-tab layout (13 ingredients, PK booster) --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Pure CSS radio-input tabs. No JavaScript. Shopify-safe. --\u003e\n\u003cstyle\u003e\n  .drf-wrap *, .drf-wrap *::before, .drf-wrap *::after { box-sizing: border-box; margin: 0; padding: 0; }\n  .drf-wrap { font-family: 'Jost', sans-serif; font-weight: 400; color: #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; }\n  .drf-wrap h3 { font-family: 'Cormorant Garamond', serif; font-weight: 600; font-size: 1.35em; color: var(--drf-grn); margin: 1.4em 0 0.4em; }\n  .drf-wrap h4 { font-family: 'Jost', sans-serif; font-weight: 600; font-size: 0.85em; 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border-bottom: 1px solid var(--drf-border); }\n  .drf-wrap table tr:nth-child(even) td { background: var(--drf-grn-light); }\n\u003c\/style\u003e\n\u003cdiv class=\"drf-wrap\"\u003e\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n\u003cinput checked id=\"drf-lb-tab1\" name=\"drf-lb-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-lb-tab2\" name=\"drf-lb-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-lb-tab3\" name=\"drf-lb-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-lb-tab4\" name=\"drf-lb-tabset\" type=\"radio\"\u003e \u003cinput id=\"drf-lb-tab5\" name=\"drf-lb-tabset\" type=\"radio\"\u003e\n\u003cdiv class=\"drf-tab-labels\"\u003e\n\u003clabel for=\"drf-lb-tab1\"\u003eOverview\u003c\/label\u003e \u003clabel for=\"drf-lb-tab2\"\u003eIngredients\u003c\/label\u003e \u003clabel for=\"drf-lb-tab3\"\u003eHow to Use\u003c\/label\u003e \u003clabel for=\"drf-lb-tab4\"\u003eThe Science\u003c\/label\u003e \u003clabel for=\"drf-lb-tab5\"\u003eFAQ\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-panels\"\u003e\n\u003c!-- ═══════════ TAB 1 — OVERVIEW ═══════════ --\u003e\n\u003cdiv id=\"drf-lb-panel1\" class=\"drf-panel\"\u003e\n\u003ch2\u003eLate Bloom 0.2-5-10 — designed to maximise flavour, terpenes and aroma\u003c\/h2\u003e\n\u003cdiv class=\"drf-badge-row\"\u003e\n\u003cspan class=\"drf-badge drf-badge-green\"\u003e0.2-5-10 NPK\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003e13 Ingredients\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003eNear-Zero Nitrogen\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003e9% Calcium\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003eFlavour \u0026amp; Terpene Finisher\u003c\/span\u003e \u003cspan class=\"drf-badge drf-badge-green\"\u003eMade in Stockport\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp\u003eLate Bloom exists for one reason: \u003cstrong\u003emaximum flavour, terpenes and aroma\u003c\/strong\u003e. It is a mineral-focused PK booster for the final stages of flowering and fruiting — when nitrogen would actively suppress the secondary metabolite production that determines how your crop tastes and smells. At \u003cstrong\u003e0.2% nitrogen\u003c\/strong\u003e, this is effectively a zero-N formula that delivers the concentrated potassium, phosphorus and sulphur that drive terpene biosynthesis, sugar accumulation and volatile compound production alongside the highest calcium content in the Dr Forest range at \u003cstrong\u003e9%\u003c\/strong\u003e. Thirteen ingredients — dominated by mineral carriers — are formulated specifically for the metabolic shift that happens when fruit stops growing and starts ripening. Not a complete feed. A finishing tool. Handcrafted in Stockport.\u003c\/p\u003e\n\u003cp\u003eApply Late Bloom \u003cstrong\u003e4–5 weeks before harvest\u003c\/strong\u003e — this is the specific window when the plant is transitioning from fruit development to ripening and terpene, ester and volatile compound biosynthesis is accelerating. The low nitrogen allows the phenylalanine pool to redirect into the phenylpropanoid and terpenoid pathways. The limited phosphorus avoids late-stage P excess that can suppress volatile production. The high potassium drives sugar transport and volatile biosynthesis at the exact moment the plant is building its flavour and aroma profile. \u003cstrong\u003eDo not apply later than 4 weeks before harvest\u003c\/strong\u003e — the plant needs time to process these minerals into terpenes, sugars and volatiles. Feeding too close to harvest leaves unprocessed mineral residue that dulls flavour and aroma complexity.\u003c\/p\u003e\n\u003cdiv class=\"drf-stats\"\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e0.2-5-10\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\"\u003e10%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003ePotassium (terpenes \u0026amp; sugars)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e9%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCalcium (highest in range)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e0.2%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eNear-Zero N (flavour focus)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhat Late Bloom is used for\u003c\/h3\u003e\n\u003cul class=\"drf-uses\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum terpene and volatile production\u003c\/strong\u003e — near-zero nitrogen allows the plant to redirect phenylalanine and acetyl-CoA into the secondary metabolite pathways that produce terpenes, esters, aldehydes and flavonoids instead of proteins and new growth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSugar accumulation and Brix\u003c\/strong\u003e — 10% potassium drives phloem loading of sugars into developing fruit, increasing sweetness, flavour intensity and the sugar substrate that feeds volatile biosynthesis\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEssential oil and resin production\u003c\/strong\u003e — potassium and sulphur from multiple sources provide the enzymatic cofactors and amino acid precursors for the mevalonic acid (MVA) and methylerythritol phosphate (MEP) pathways that produce monoterpenes, sesquiterpenes and terpenoids\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAroma complexity\u003c\/strong\u003e — trace elements from Basalt Rock Dust and Scottish Seaweed supply the zinc, manganese, iron and copper cofactors that catalyse the final enzymatic steps in volatile compound production\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium for fruit quality\u003c\/strong\u003e — 9% calcium from four mineral sources strengthens cell walls, prevents blossom end rot, improves firmness and extends shelf life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal feed before harvest\u003c\/strong\u003e — replaces your Bloom feed for a single application 4–5 weeks before harvest, then all feeding stops to let the plant finish naturally\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutdoor late-season flavour booster\u003c\/strong\u003e — apply once to tomatoes, chillies, peppers, strawberries and other fruiting crops 4–5 weeks before harvest to concentrate flavour, sugars and aroma compounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnzyme-rich microbial activator\u003c\/strong\u003e — contains Diastatic Malted Barley with active amylase and protease enzymes that accelerate nutrient cycling — making the mineral inputs available faster when speed matters most\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eLate Bloom vs Bloom 2-8-4\u003c\/h3\u003e\n\u003cdiv class=\"drf-compare\"\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eLate Bloom 0.2-5-10 (Flavour \u0026amp; Terpene Finisher)\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eNear-zero nitrogen — unlocks terpene and flavonoid pathways\u003c\/li\u003e\n\u003cli\u003e10% potassium — drives sugar transport and volatile biosynthesis\u003c\/li\u003e\n\u003cli\u003e9% calcium — strongest fruit firmness and shelf life support\u003c\/li\u003e\n\u003cli\u003eSulphur from multiple sources — precursor to aroma compounds\u003c\/li\u003e\n\u003cli\u003eTrace minerals for terpene enzyme cofactors\u003c\/li\u003e\n\u003cli\u003eApplied 4–5 weeks before harvest — when flavour is made or lost\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eBloom 2-8-4 (Complete Bloom Feed)\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e2% nitrogen — maintains plant during the flower stretch\u003c\/li\u003e\n\u003cli\u003eBalanced PK across the full flowering period\u003c\/li\u003e\n\u003cli\u003eContains the full organic nitrogen base for sustained feeding\u003c\/li\u003e\n\u003cli\u003eUsed from flip\/pre-flower through to mid-bloom\u003c\/li\u003e\n\u003cli\u003eComplete feed — carries the entire flowering stage\u003c\/li\u003e\n\u003cli\u003eTransition to Late Bloom when fruit is fully set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eHandcrafted in Stockport\u003c\/span\u003e\n\u003cp\u003eEvery batch of Late Bloom is blended by hand in our Stockport unit. Mineral-focused formulation using traceable British ingredients including Yorkshire Polyhalite, Micronised Gypsum and Scottish Seaweed. No slaughterhouse waste. No synthetic chemistry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ TAB 2 — INGREDIENTS ═══════════ --\u003e\n\u003cdiv id=\"drf-lb-panel2\" class=\"drf-panel\"\u003e\n\u003ch2\u003eAll 13 ingredients — mineral-focused for the finishing stage\u003c\/h2\u003e\n\u003cp\u003eLate Bloom is deliberately mineral-heavy. Unlike the Veg and Bloom formulas which balance organic N sources with mineral carriers, Late Bloom strips nitrogen to near-zero and loads the formula with the mineral inputs that matter at the finishing stage — potassium for sugar transport, phosphorus for seed development, calcium for fruit quality and sulphur for volatile production.\u003c\/p\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003ePhosphorous Meal — Plant-derived, fast-moderate release\u003c\/h4\u003e\n\u003cp\u003eThe largest single ingredient at 17% of the blend. Delivers 15% phosphorus and 9% calcium. Citric acid soluble — meaning plant roots can access the phosphorus directly through their own root exudates. At the finishing stage, P supports seed maturation, energy transfer via ATP, and the metabolic pathways that drive ripening.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\n\u003ch4\u003eSulphate of Potash — Mineral, immediate release\u003c\/h4\u003e\n\u003cp\u003e16% of the blend. Delivers 50% K₂O in chloride-free, immediately plant-available form. This is the fast-acting K that drives sugar transport, carotenoid production and volatile biosynthesis from the moment it dissolves. At the finishing stage, K availability determines how much sugar reaches the fruit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\n\u003ch4\u003eMicronised Gypsum (Calcium Sulphate) — Mineral, immediate release\u003c\/h4\u003e\n\u003cp\u003e15% of the blend — the largest calcium source. Delivers 23% calcium and 18% sulphur in immediately plant-available sulphate form. At 9% total calcium, Late Bloom delivers more calcium per application than any other Dr Forest product. Calcium strengthens pectin cross-links in cell walls — producing firmer fruit with longer shelf life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\n\u003ch4\u003eScottish Seaweed (Ascophyllum nodosum) — Hand-harvested biostimulant\u003c\/h4\u003e\n\u003cp\u003e8.5% of the blend — double the amount in the Premium range. Contains cytokinins, auxins, alginic acid and over 60 trace elements. At the finishing stage, seaweed's cytokinin content delays senescence — keeping leaves photosynthetically active longer so more sugar reaches the fruit. Also enhances stress tolerance during the critical ripening period.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\n\u003ch4\u003eEpsom Salt (Magnesium Sulphate) — Mineral, immediate release\u003c\/h4\u003e\n\u003cp\u003e7.5% of the blend. 17.7% magnesium and 14% sulphur in immediately available form. Magnesium is the central atom of chlorophyll — maintaining photosynthetic efficiency at the finishing stage when leaves are often beginning to fade. The sulphur fraction drives volatile compound production.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\n\u003ch4\u003eBasalt Rock Dust — Mineral, trace element spectrum\u003c\/h4\u003e\n\u003cp\u003e6.5% of the blend. Over 60 trace elements including iron, manganese, zinc, copper, boron and selenium. These are the enzyme cofactors for the secondary metabolite pathways — terpene, ester and aldehyde biosynthesis — that determine the flavour and aroma complexity of the finished crop.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e07\u003c\/span\u003e\n\u003ch4\u003eMicronised Rock Phosphate — Mineral, slow reserve\u003c\/h4\u003e\n\u003cp\u003e6% of the blend. 31% phosphorus and 46% calcium. The ultra-fine particle size accelerates dissolution compared to standard rock phosphate. Provides a long-release P and Ca reserve that continues to deliver through the final weeks of fruiting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e08\u003c\/span\u003e\n\u003ch4\u003eDiastatic Malted Barley — Enzyme-rich microbial activator\u003c\/h4\u003e\n\u003cp\u003e6% of the blend. Germinated barley containing active amylase and protease enzymes that break down starches and proteins in the soil into plant-available sugars and amino acids. Accelerates microbial nutrient cycling — making the mineral inputs in this formula available faster. Also contains natural auxins and gibberellins. Exclusive to the Veg, Bloom and Late Bloom range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e09\u003c\/span\u003e\n\u003ch4\u003eYorkshire Polyhalite — North Yorkshire, slow release 50–60 days\u003c\/h4\u003e\n\u003cp\u003e5% of the blend. K, Ca, Mg and S from a single crystal. The slow-release profile extends potassium and calcium supply beyond the immediate availability of SOP and Gypsum — ensuring no nutrient gap during the final weeks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e10\u003c\/span\u003e\n\u003ch4\u003eNitrogen Plant Extract — Plant-derived, minimal N\u003c\/h4\u003e\n\u003cp\u003e4% of the blend at 12% N — contributing just 0.48% to the formula total. This trace amount prevents complete nitrogen starvation which would cause premature leaf drop and shut down photosynthesis before the fruit is ready. Enough to keep the plant functional, not enough to drive new growth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e11\u003c\/span\u003e\n\u003ch4\u003ePotassium Mineral — Mineral, slow release\u003c\/h4\u003e\n\u003cp\u003e4% of the blend. A secondary potassium source providing 11% K in a slow-release mineral form. Extends the K supply window beyond the immediate availability of Sulphate of Potash.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e12\u003c\/span\u003e\n\u003ch4\u003eBiochar — British, activated carbon scaffold\u003c\/h4\u003e\n\u003cp\u003e3.5% of the blend. Permanent porous carbon with up to 300m² internal surface area per gram. Provides habitat for beneficial microorganisms and increases potassium retention by 18–35% under leaching conditions. Particularly valuable in containers where frequent watering can flush soluble K out of the root zone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e13\u003c\/span\u003e\n\u003ch4\u003eHumic \u0026amp; Fulvic Acid — Mineral organic, chelation\u003c\/h4\u003e\n\u003cp\u003e1% of the blend. Fulvic acid chelates micronutrients into plant-available complexes. Humic acid increases CEC and stimulates microbial activity. Small inclusion, outsized impact on trace element availability at the critical finishing stage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ TAB 3 — HOW TO USE ═══════════ --\u003e\n\u003cdiv id=\"drf-lb-panel3\" class=\"drf-panel\"\u003e\n\u003ch2\u003eHow to use Late Bloom: application rates \u0026amp; timing\u003c\/h2\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eOne application, 4–5 weeks before harvest\u003c\/span\u003e\n\u003cp\u003eLate Bloom is not a feed you apply repeatedly through flowering. It is a single application made 4–5 weeks before harvest — replacing your Bloom feed for that one top dress, then all feeding stops. The plant needs those 4–5 weeks to process the potassium, phosphorus and sulphur into the terpenes, sugars and volatile compounds that define flavour and aroma. Applying Late Bloom closer to harvest leaves unprocessed mineral residue that dulls flavour complexity. For the main flowering period, use Dr Forest Bloom 2-8-4 or 2-8-10.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eApplication rates\u003c\/h3\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eTop dressing — indoor containers\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 2–4ml per litre of pot volume  |  \u003cstrong\u003eWhen:\u003c\/strong\u003e Apply once, 4–5 weeks before harvest\u003c\/div\u003e\n\u003cp\u003e2ml\/L for autoflowers and light feeders — entering the volatile production zone. 3ml\/L for standard feeding — solidly in the volatile zone. 4ml\/L for maximum terpene and flavour production — peak K delivery for sugar transport and volatile biosynthesis. Sprinkle on the soil surface and water in. \u003cstrong\u003eFor a 20-litre pot at 3ml\/L, that is approximately 4 tablespoons.\u003c\/strong\u003e This is the last feed before harvest — do not apply additional fertiliser after this point. The plant needs 4–5 weeks to process these minerals into terpenes, sugars and aroma compounds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eOutdoor beds — fruiting crops\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 75–150g per m²  |  \u003cstrong\u003eWhen:\u003c\/strong\u003e Apply once, 4–5 weeks before main harvest\u003c\/div\u003e\n\u003cp\u003eApply to tomatoes, chillies, peppers, strawberries and other fruiting crops when fruit is set and beginning to colour. 75g\/m² when supplementing an existing Bloom programme. 100g\/m² for standard finishing. 150g\/m² for maximum flavour, sugar and volatile concentration. Scatter evenly and work into the top 5cm. Water deeply. This is the last feed — the crop needs 4–5 weeks to convert these minerals into flavour and aroma.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eCoco coir substrates\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e Upper end of dosage range  |  \u003cstrong\u003eNote:\u003c\/strong\u003e Do not water to heavy runoff\u003c\/div\u003e\n\u003cp\u003eCoco requires the upper end (3–4ml\/L) and more frequent application. Ensure coco is pre-buffered with cal-mag. Add worm castings or compost at 20–30% of the mix to provide the biology that breaks down organic matter. Heavy runoff flushes dry amendments out of the root zone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr class=\"drf-sep\"\u003e\n\u003ch3\u003eWhen to start Late Bloom\u003c\/h3\u003e\n\u003cdiv class=\"drf-compare\"\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eIndoor growing\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eApply Late Bloom once, 4–5 weeks before harvest\u003c\/li\u003e\n\u003cli\u003eThis replaces your Bloom feed for that single application\u003c\/li\u003e\n\u003cli\u003eDo not feed again after the Late Bloom application\u003c\/li\u003e\n\u003cli\u003eThe plant needs 4–5 weeks to process minerals into terpenes and aroma\u003c\/li\u003e\n\u003cli\u003eFeeding closer to harvest leaves unprocessed residue that dulls flavour\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eOutdoor fruiting crops\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eApply once, 4–5 weeks before you expect to begin harvesting\u003c\/li\u003e\n\u003cli\u003eTomatoes: when first truss is colouring and remaining trusses are set\u003c\/li\u003e\n\u003cli\u003eChillies: when first fruit shows colour change\u003c\/li\u003e\n\u003cli\u003eStrawberries: 4–5 weeks before main picking begins\u003c\/li\u003e\n\u003cli\u003eDo not feed again after application — let the crop finish on its own\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with…\u003c\/span\u003e\n\u003cp\u003eUse after \u003cstrong\u003eDr Forest Bloom 2-8-4\u003c\/strong\u003e or \u003cstrong\u003eBloom 2-8-10\u003c\/strong\u003e as the main flowering feed. Supplement with \u003cstrong\u003eDr Forest Cal-Mag\u003c\/strong\u003e throughout the grow. Add \u003cstrong\u003eSeaweed Powder\u003c\/strong\u003e as a fortnightly foliar for additional cytokinin and trace element delivery. See our \u003ca style=\"color: var(--drf-grn); text-decoration: underline;\" href=\"\/pages\/feeding-schedule\"\u003efeeding schedule\u003c\/a\u003e for the full programme.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWater quality matters\u003c\/span\u003e\n\u003cp\u003eUse dechlorinated water. Chlorine and chloramine kill the beneficial soil microbes that break down organic matter and deliver nutrients. Leave tap water to stand for 24 hours, use a carbon filter, or add a dechlorinator.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ TAB 4 — THE SCIENCE ═══════════ --\u003e\n\u003cdiv id=\"drf-lb-panel4\" class=\"drf-panel\"\u003e\n\u003ch2\u003eThe science of flavour: why near-zero nitrogen and high PK maximises terpenes, sugars and aroma\u003c\/h2\u003e\n\u003cp\u003eThe final stage of fruit and flower development is when \u003cstrong\u003eflavour and aroma are made or lost\u003c\/strong\u003e. The plant has stopped building structure and is directing metabolic energy into \u003cstrong\u003eterpene biosynthesis, sugar accumulation, volatile compound production, essential oil synthesis and carotenoid pigmentation\u003c\/strong\u003e. Every one of these pathways is enhanced by potassium, sulphur and trace minerals — and every one is suppressed by excess nitrogen. Late Bloom is formulated around this biochemistry.\u003c\/p\u003e\n\u003cdiv class=\"drf-stats\"\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e0.2%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eN (unlocks terpene pathways)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e10%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eK (sugar \u0026amp; volatile driver)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e9%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eCa (fruit quality)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e5%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eP (energy for ripening)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"drf-sep\"\u003e\n\u003ch3\u003eMechanisms of action\u003c\/h3\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\n\u003ch4\u003eNitrogen restriction unlocks terpene and flavonoid biosynthesis\u003c\/h4\u003e\n\u003cp\u003eWhen nitrogen supply drops, the plant redirects its metabolic budget. Phenylalanine is diverted from protein synthesis into the phenylpropanoid pathway — producing more flavonoids, anthocyanins and phenolic compounds. Acetyl-CoA and pyruvate — normally consumed by amino acid synthesis — become available for the MVA and MEP pathways that produce monoterpenes (myrcene, limonene, pinene), sesquiterpenes (caryophyllene, humulene) and terpenoids (linalool, terpineol). Sugar that would have been used for new growth accumulates in fruit instead. Essential oil production intensifies as the plant's defensive chemistry ramps up. This is the biochemistry behind the universal observation that flavour and aroma peak when growth slows.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\n\u003ch4\u003ePotassium drives sugar transport into fruit\u003c\/h4\u003e\n\u003cp\u003ePotassium activates sucrose synthase and drives phloem loading — the active transport of sugars from leaves into developing fruit. At 10% K, Late Bloom provides the potassium concentration needed for maximum sugar delivery during the critical final weeks. Higher Brix, higher fructose, and more substrate for volatile ester and aldehyde biosynthesis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\n\u003ch4\u003eCalcium strengthens fruit structure\u003c\/h4\u003e\n\u003cp\u003e9% calcium from four mineral sources. Calcium cross-links pectin molecules in cell walls, producing firmer fruit that resists bruising, cracking and post-harvest deterioration. Continuous calcium supply during fruit expansion prevents blossom end rot — the most common calcium-related disorder in tomatoes, peppers and courgettes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\n\u003ch4\u003ePhosphorus for energy transfer and seed development\u003c\/h4\u003e\n\u003cp\u003e5% phosphorus supports ATP synthesis — the energy currency that powers the metabolic pathways of ripening. P also drives seed maturation within the fruit, which triggers the hormonal cascade of ethylene-mediated ripening.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\n\u003ch4\u003eSulphur and volatile aroma compounds\u003c\/h4\u003e\n\u003cp\u003eSulphur from Polyhalite, SOP, Gypsum and Epsom Salt. Sulphur-containing amino acids (methionine, cysteine) are precursors to many key volatile compounds in fruit and flowers. S also drives carotenoid biosynthesis — the pigments responsible for red, orange and yellow fruit colour.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\n\u003ch4\u003eEnzyme-accelerated nutrient cycling\u003c\/h4\u003e\n\u003cp\u003eDiastatic Malted Barley provides active amylase and protease enzymes that accelerate the breakdown of organic matter in the soil, making the mineral inputs in this formula available faster. At the finishing stage, speed of nutrient delivery matters — the plant needs K and Ca now, not in 6 weeks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-refs\"\u003e\n\u003ch4\u003eReferences\u003c\/h4\u003e\n\u003col\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\u003eWang, M. et al. (2023). Combined organic-mineral fertilisation meta-analysis (7,859 data pairs). \u003cem\u003eField Crops Research\u003c\/em\u003e.\u003c\/li\u003e\n\u003cli\u003eNardi, S. et al. (2009). Humic substances: chemical and biological activity. \u003cem\u003eSoil Biology \u0026amp; Biochemistry\u003c\/em\u003e, 41, 2164–2175.\u003c\/li\u003e\n\u003cli\u003eLehmann, J. et al. (2011). Biochar effects on soil biota. \u003cem\u003eSoil Biology \u0026amp; Biochemistry\u003c\/em\u003e, 43, 1812–1836.\u003c\/li\u003e\n\u003cli\u003eShukla, P.S. et al. (2019). Ascophyllum nodosum-based biostimulants. \u003cem\u003eFrontiers in Plant Science\u003c\/em\u003e, 10, 655.\u003c\/li\u003e\n\u003cli\u003eJohnston, A.E. \u0026amp; Dawson, C.J. (2018). Polyhalite as a multi-nutrient fertiliser. \u003cem\u003eProc. 826, Int. Fertiliser Society\u003c\/em\u003e.\u003c\/li\u003e\n\u003cli\u003eLi, J. et al. (2024). Organic fertilisation upregulates starch and sucrose metabolism genes. \u003cem\u003eNature Scientific Reports\u003c\/em\u003e, 14.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ═══════════ TAB 5 — FAQ ═══════════ --\u003e\n\u003cdiv id=\"drf-lb-panel5\" class=\"drf-panel\"\u003e\n\u003ch2\u003eFrequently asked questions about Late Bloom 0.2-5-10\u003c\/h2\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq1\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq1\" class=\"drf-faq-q\"\u003eCan I use Late Bloom as my only flowering fertiliser?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eNo. Late Bloom is a single-application flavour finisher, not a complete flowering feed. It contains near-zero nitrogen which means it cannot sustain the plant through the flower stretch or fruit development. Use Dr Forest Bloom 2-8-4 or 2-8-10 as your main flowering feed throughout, then replace your Bloom feed with a single Late Bloom application 4–5 weeks before harvest. After that, all feeding stops.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq2\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq2\" class=\"drf-faq-q\"\u003eWhen exactly should I apply Late Bloom?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eApply once, 4–5 weeks before harvest. For indoor growing, count back from your expected harvest date. For outdoor crops, apply when fruit is set and beginning to colour — typically 4–5 weeks before you expect to start picking. This is the last feed before harvest. Do not apply any fertiliser after the Late Bloom application — the plant needs 4–5 weeks to process the minerals into terpenes, sugars and aroma compounds. Feeding closer to harvest leaves unprocessed mineral residue that reduces flavour complexity.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq3\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq3\" class=\"drf-faq-q\"\u003eWhy does it have 9% calcium?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eCalcium strengthens pectin cross-links in cell walls — producing firmer, longer-lasting fruit with better shelf life. It also prevents blossom end rot. At the finishing stage, fruit cells are expanding rapidly and demand continuous calcium supply. Late Bloom delivers more calcium per application than any other Dr Forest product because this is the stage where calcium matters most.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq4\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq4\" class=\"drf-faq-q\"\u003eCan I use this on outdoor tomatoes and chillies?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eYes — Late Bloom is excellent for outdoor fruiting crops. Apply at 75–150g\/m² once, 4–5 weeks before you expect to start harvesting. For tomatoes, apply when the first truss is colouring. For chillies, when the first fruit shows colour change. Do not feed again after application — let the crop finish naturally. The 4–5 week gap allows the plant to convert the potassium and sulphur into the sugars, capsaicin and volatile compounds that define flavour.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq5\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq5\" class=\"drf-faq-q\"\u003eDoes it work in coco coir?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eYes, but use the upper end of the dosage range (3–4ml\/L) and ensure coco is pre-buffered with cal-mag. Coco is biologically inert — add worm castings or compost at 20–30% of the mix to introduce the microbial life that breaks down organic matter. Do not water to heavy runoff — unlike synthetic growing, heavy runoff flushes dry amendments out of the root zone.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq6\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq6\" class=\"drf-faq-q\"\u003eWhy is there any nitrogen at all if this is a finishing formula?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eComplete nitrogen starvation causes premature leaf senescence — the leaves yellow and die before the fruit is ready, cutting off the sugar supply from photosynthesis. The trace amount of nitrogen (0.2%) keeps leaves functional long enough for the fruit to finish properly without promoting any new vegetative growth.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq7\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq7\" class=\"drf-faq-q\"\u003eCan I use this with autoflowers?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eYes. Apply once at the lower end (2ml\/L), 4–5 weeks before harvest. Autoflowers have a shorter overall cycle — count back from your expected harvest date and apply a single Late Bloom top dress at that point. Do not feed again afterwards. Even with a compressed timeline, the 4–5 week processing window is important for flavour development.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq8\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq8\" class=\"drf-faq-q\"\u003eDo I need Cal-Mag alongside Late Bloom?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eLate Bloom already contains 9% calcium — the highest in the range — plus magnesium from Epsom Salt and Yorkshire Polyhalite. For most grows, this is sufficient for the finishing stage. If you are in a soft water area or growing in coco, continuing Cal-Mag supplementation is recommended.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq9\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq9\" class=\"drf-faq-q\"\u003eWhat is Diastatic Malted Barley and why is it in a finishing formula?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eDiastatic Malted Barley contains active amylase and protease enzymes that accelerate the breakdown of organic matter into plant-available nutrients. At the finishing stage, speed matters — the plant needs K and Ca now, not in 6 weeks. The enzymes help the mineral inputs in Late Bloom become available faster. It is exclusive to our Veg, Bloom and Late Bloom range.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"drf-faq\"\u003e\n\u003cinput id=\"drf-lb-faq10\" type=\"checkbox\"\u003e\u003clabel for=\"drf-lb-faq10\" class=\"drf-faq-q\"\u003eIs it organic?\u003c\/label\u003e\n\u003cdiv class=\"drf-faq-a\"\u003e\n\u003cdiv\u003eMade from organic and natural ingredients. No synthetic chemicals, no slaughterhouse waste, no GMO inputs. Suitable for organic growing systems.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Dr Forest","offers":[{"title":"750g","offer_id":37609555919035,"sku":null,"price":11.0,"currency_code":"GBP","in_stock":true},{"title":"1.5kg","offer_id":37609555951803,"sku":null,"price":12.99,"currency_code":"GBP","in_stock":true},{"title":"3kg","offer_id":37609555984571,"sku":null,"price":22.49,"currency_code":"GBP","in_stock":true},{"title":"9kg","offer_id":37609556017339,"sku":null,"price":50.49,"currency_code":"GBP","in_stock":true},{"title":"18kg","offer_id":44236519538875,"sku":null,"price":80.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/late_bloom_image_res.png?v=1775515320","url":"https:\/\/www.drforest.co.uk\/products\/organic-late-bloom-fertiliser","provider":"Dr Forest","version":"1.0","type":"link"}