{"product_id":"humic-acid-flakes","title":"Humic Acid Flakes | 70% Humic Acid, 100% Water Soluble | Premium Leonardite Soil Conditioner | Dr Forest","description":"\u003c!-- Dr Forest — Humic Acid Flakes Shopify product description --\u003e\n\u003c!-- Prefix: drf-ha- (humic acid, per skill registry) --\u003e\n\u003c!-- Design System v1.0 — square corners, Cormorant 400, gold accents, no border-radius --\u003e\n\u003c!-- Pure CSS radio-input tabs. No JavaScript. Shopify-safe. --\u003e\n\u003c!-- Embedded JSON-LD: Product + FAQPage + HowTo schema at end of file. --\u003e\n\u003c!-- Do NOT paste schemas from the SEO companion separately — they live here. --\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-dark:   #0F2A1F;\n    --drf-grn-light:  #E8F0EB;\n    --drf-grn-mid:    #4a7a5e;\n    --drf-cream:      #F5F2EC;\n    --drf-gold:       #C5A55A;\n    --drf-gold-light: #FAF7F0;\n    --drf-muted:      #3A4A40;\n    --drf-white:      #FFFFFF;\n    --drf-border:     #d4cfc5;\n  }\n  .drf-wrap h2 { font-family: 'Cormorant Garamond', serif; font-weight: 400; font-size: 1.9em; color: var(--drf-grn); line-height: 1.25; margin-bottom: 0.5em; }\n  .drf-wrap h3 { font-family: 'Cormorant Garamond', serif; 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margin-bottom: 0.5em; }\n  .drf-refs ol { padding-left: 1.4em; margin: 0; }\n  .drf-refs li { margin-bottom: 0.35em; }\n\n  .drf-sep { border: none; border-top: 1px solid var(--drf-gold); margin: 1.5em auto; width: 200px; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"drf-wrap\"\u003e\n\u003cdiv class=\"drf-tabs-wrap\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-ha-tabset\" id=\"drf-ha-tab1\" checked\u003e\n  \u003cinput type=\"radio\" name=\"drf-ha-tabset\" id=\"drf-ha-tab2\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-ha-tabset\" id=\"drf-ha-tab3\"\u003e\n  \u003cinput type=\"radio\" name=\"drf-ha-tabset\" id=\"drf-ha-tab4\"\u003e\n  \u003cdiv class=\"drf-tab-labels\"\u003e\n    \u003clabel for=\"drf-ha-tab1\"\u003eOverview\u003c\/label\u003e\n    \u003clabel for=\"drf-ha-tab2\"\u003eThe Science\u003c\/label\u003e\n    \u003clabel for=\"drf-ha-tab3\"\u003eHow to Use\u003c\/label\u003e\n    \u003clabel for=\"drf-ha-tab4\"\u003eFAQ\u003c\/label\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"drf-panels\"\u003e\n\n  \u003c!-- ═══════════════ TAB 1: OVERVIEW ═══════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-ha-panel1\"\u003e\n    \u003ch2\u003eHumic acid flakes — 70% humic acid, 100% water soluble, premium leonardite extract\u003c\/h2\u003e\n\n    \u003cdiv class=\"drf-badge-row\"\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e70% Humic Acid\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003e100% Water Soluble\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003ePremium Leonardite\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eCEC 450 meq\/100g\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-gold\"\u003eFertigation Grade\u003c\/span\u003e\n      \u003cspan class=\"drf-badge drf-badge-green\"\u003eFlake Format\u003c\/span\u003e\n    \u003c\/div\u003e\n\n    \u003cp\u003e\u003cstrong\u003eHumic acid flakes are a refined, fully water-soluble extract of premium leonardite\u003c\/strong\u003e — the highest-quality source of humic substances known, formed over geological timescales from the oxidation of ancient plant-rich lignite deposits. At 70% humic acid content, these flakes are the active concentrate that decades of agronomic research has built application protocols around.\u003c\/p\u003e\n    \u003cp\u003eHumic acid is not a fertiliser in the conventional sense. It supplies no primary nutrients directly. What it does is transform the environment in which nutrients operate: it raises the cation exchange capacity of the soil so minerals are held and released to roots rather than leached away, it directly stimulates bacterial and fungal biomass in the rhizosphere, and it carries auxin-like activity that drives root cell elongation within days of application. These are cumulative gains that compound across growing seasons.\u003c\/p\u003e\n    \u003cp\u003eThe flake format dissolves to complete clarity within minutes of mixing — no sediment, no residue, no insoluble fraction. That solubility is what makes the flakes usable across every application method peer-reviewed research has shown to work: foliar spray, soil drench, seed soak, and compost tea. Handcrafted in Stockport, made with organic ingredients, no animal by-products.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-stats\"\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e70%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eHumic Acid\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e100%\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003eWater Soluble\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003e450\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003emeq\/100g CEC\u003c\/span\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-stat\"\u003e\n\u003cspan class=\"drf-stat-number\"\u003eLeonardite\u003c\/span\u003e\u003cspan class=\"drf-stat-label\"\u003ePremium Source\u003c\/span\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3\u003eWhat humic acid flakes are used for\u003c\/h3\u003e\n    \u003cul class=\"drf-uses\"\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFoliar spray\u003c\/strong\u003e — auxin-like response in leaf tissue, used routinely in tomato, pepper, strawberry and ornamental research at concentrations from 200 mg\/L upwards\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSoil drench\u003c\/strong\u003e — even root-zone delivery with faster uptake than dry amendments; standard method in greenhouse and field trials\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSeed soak\u003c\/strong\u003e — pre-sowing treatment shown to lift germination rate and seedling vigour across maize, wheat, cotton, faba bean, and many vegetables\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCompost tea\u003c\/strong\u003e — added as a microbial food during brewing; documented to stimulate fungal biomass and chelate chlorine in mains water\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eTransplant drench\u003c\/strong\u003e — auxin-like root stimulation within 48–72 hours, reducing transplant shock and accelerating establishment\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003ePeat-free compost conditioning\u003c\/strong\u003e — peat-free media is naturally low in humic substances; regular drenches replenish humic content and extend compost working life\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFertigation and drip irrigation\u003c\/strong\u003e — dissolves to complete clarity, so suitable for drip systems, emitters, and automated dosing without clogging\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eSoil biology activation\u003c\/strong\u003e — directly stimulates bacterial biomass (+30–60%) and mycorrhizal colonisation (+25–40%) at agronomic rates\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3\u003eWhy fully soluble flakes\u003c\/h3\u003e\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003eFully soluble humic flakes\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003eDissolves to complete clarity within 2–5 minutes in water\u003c\/li\u003e\n          \u003cli\u003eNo sediment, no sludge, no insoluble fraction\u003c\/li\u003e\n          \u003cli\u003eSafe for drip emitters, spray nozzles, and inline filters\u003c\/li\u003e\n          \u003cli\u003eEvery gram of humic content delivered in bioavailable dissolved form\u003c\/li\u003e\n          \u003cli\u003eWeigh, dissolve, apply — no settling or siphoning step\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n        \u003ch4\u003ePartially soluble humate products\u003c\/h4\u003e\n        \u003cul\u003e\n          \u003cli\u003e10–20% of material remains as insoluble residue\u003c\/li\u003e\n          \u003cli\u003eSediment settles at the bottom of the watering can\u003c\/li\u003e\n          \u003cli\u003eUnsuitable for drip irrigation — emitters block\u003c\/li\u003e\n          \u003cli\u003eOnly the soluble fraction works quickly\u003c\/li\u003e\n          \u003cli\u003eStock solutions require settling and siphoning\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════════ TAB 2: THE SCIENCE ═══════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-ha-panel2\"\u003e\n    \u003ch2\u003eThe science of humic acid: how leonardite-derived humates transform soil chemistry and biology\u003c\/h2\u003e\n\n    \u003ch3\u003eWhat humic substances actually are\u003c\/h3\u003e\n    \u003cp\u003eHumic substances are the end product of plant and microbial decomposition, formed over geological timescales through progressive oxidation and polymerisation of organic matter. They are large, dark, carbon-rich molecules with a structure dominated by \u003cstrong\u003ecarboxyl (-COOH) and hydroxyl (-OH) functional groups\u003c\/strong\u003e. These functional groups are the source of humic acid's properties: they carry negative charge, which enables cation exchange; they chelate metal ions, which makes micronutrients plant-available; and they bind to mineral and organic particles, which stabilises soil aggregates.\u003c\/p\u003e\n    \u003cp\u003eLeonardite from premium deposits contains some of the highest concentrations of humic substances found anywhere in nature — far higher than the 1–5% humic content of even good garden topsoil, and significantly higher than lower-grade sources such as standard lignite, peat, or vermicompost. The use of leonardite humates in agriculture is backed by over 50 years of agronomic research across dozens of crops and soil types, summarised most recently in the Rose et al. (2014) meta-analysis and the Canellas et al. (2015) biostimulant review.\u003c\/p\u003e\n\n    \u003ch3\u003eHumic acid vs fulvic acid — they do different jobs\u003c\/h3\u003e\n\n    \u003cdiv class=\"drf-compare\"\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eHumic acid — works in the soil\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eLarge molecules (MW 10,000–100,000 Da)\u003c\/li\u003e\n\u003cli\u003ePrimary role: structure, CEC, fungal promotion, nitrogen stabilisation\u003c\/li\u003e\n\u003cli\u003eSlow, cumulative benefits that build across seasons\u003c\/li\u003e\n\u003cli\u003eBest used as monthly soil drench, foliar spray, or pre-sowing seed soak\u003c\/li\u003e\n\u003cli\u003eThis product — flakes for liquid application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n      \u003cdiv class=\"drf-compare-box\"\u003e\n\u003ch4\u003eFulvic acid — works inside the plant\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSmall molecules (MW 1,000–10,000 Da)\u003c\/li\u003e\n\u003cli\u003ePrimary role: nutrient chelation, membrane transport, foliar uptake\u003c\/li\u003e\n\u003cli\u003eFast-acting; responses visible within days\u003c\/li\u003e\n\u003cli\u003eBest added to every liquid feed and foliar spray\u003c\/li\u003e\n\u003cli\u003eSee Dr Forest Fulvic Acid Powder for the matching product\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n\n    \u003ch3\u003eWhat CEC means in practice\u003c\/h3\u003e\n    \u003cp\u003eCEC (cation exchange capacity) measures how many positively charged nutrient ions a soil or amendment can hold and exchange with plant roots. Sandy soils typically have a CEC of 2–5 meq\/100g. Good clay soils reach 20–40 meq\/100g. Leonardite humic acid has a CEC of \u003cstrong\u003e450 meq\/100g\u003c\/strong\u003e — roughly 10–200× the CEC of the soil it is added to. Even small quantities dramatically increase the capacity of a growing medium to hold calcium, magnesium, potassium, ammonium, and trace elements that would otherwise leach through with watering. For containers, raised beds, and peat-free media — where intense watering removes nutrients quickly — this is one of the most valuable properties of any soil amendment.\u003c\/p\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n\n    \u003ch3\u003eSix mechanisms of action\u003c\/h3\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e01\u003c\/span\u003e\u003ch4\u003eSoil aggregation \u0026amp; structure\u003c\/h4\u003e\n\u003cp\u003eHumic acid molecules bridge mineral particles and organic matter into stable macro-aggregates, creating pore spaces that improve drainage in clay soils and moisture retention in sandy soils. In clay soils, aggregation opens the structure and reduces compaction. In sandy soils, humic coatings on sand grains increase water-holding capacity considerably (Stevenson, 1994).\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e02\u003c\/span\u003e\u003ch4\u003eCation exchange \u0026amp; nutrient retention\u003c\/h4\u003e\n\u003cp\u003eHumic acid functional groups carry a strong negative charge that binds positively charged nutrient cations — calcium, magnesium, potassium, ammonium, iron, manganese, zinc — on exchange sites. This slows leaching, stabilises nitrogen, and creates a reservoir of plant-available nutrients that release progressively as roots demand them. For peat-free compost and container growing, this is transformative.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e03\u003c\/span\u003e\u003ch4\u003ePhosphorus solubilisation\u003c\/h4\u003e\n\u003cp\u003ePhosphorus in most soils is rapidly locked up by binding with calcium, iron, and aluminium. Humic acid competes for these cation binding sites and forms soluble humate-metal complexes, releasing previously fixed phosphorus back into plant-available form. The Ma et al. (2024) meta-analysis reports an average crop yield gain of 12% and nitrogen use efficiency gain of 27% when humic acid is applied alongside conventional fertilisers.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e04\u003c\/span\u003e\u003ch4\u003eMicrobial \u0026amp; mycorrhizal promotion\u003c\/h4\u003e\n\u003cp\u003eHumic substances directly stimulate bacterial and fungal biomass in the rhizosphere. Nardi et al. (2009) demonstrated increases of 30–60% in bacterial biomass and 25–40% in mycorrhizal colonisation following humic acid application. The carbon structure acts as a slow-release food source that supports the microbial engine of nutrient cycling.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e05\u003c\/span\u003e\u003ch4\u003eRoot growth stimulation\u003c\/h4\u003e\n\u003cp\u003eHumic acid carries auxin-like activity that directly stimulates root cell elongation and lateral root initiation. Visible root mass improvements typically appear within 2–3 weeks of regular application, with particularly strong responses at transplanting. Canellas et al. (2015) reviewed 40 years of research confirming consistent root hormone-like effects across dozens of crop species.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003cdiv class=\"drf-mech\"\u003e\n\u003cspan class=\"drf-mech-num\"\u003e06\u003c\/span\u003e\u003ch4\u003eHeavy metal chelation \u0026amp; detoxification\u003c\/h4\u003e\n\u003cp\u003eHumic acid binds tightly to aluminium, lead, cadmium, and other potentially toxic cations, reducing their bioavailability. In acidic soils where aluminium toxicity limits root growth, humic acid provides an immediate detoxification effect alongside its other benefits — one reason it is routinely used in remediation programmes on degraded land (Piccolo, 2002).\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003ePeer-reviewed trial outcomes\u003c\/h3\u003e\n    \u003cp\u003eThe humic acid literature is unusually consistent across crops and soil types. Yildirim (2007) reported significant yield, fruit weight, and ascorbic acid improvements in tomato at 20 ml\/L foliar applications, with Karakurt et al. (2009) confirming the same window for pepper. Eshghi and Garazhian (2015) identified 600–900 mg\/L foliar and 300–450 mg\/L drench as optimal windows for strawberry. Kadhim and Hamza (2021) showed that pre-sowing maize seed soak at 1 ml\/L for 18 hours raised emergence rate and seedling vigour significantly. The mechanisms differ slightly by crop and method, but the direction of the effect is stable: humic acid applied at agronomic rates improves root mass, nutrient uptake efficiency, and final yield.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-pullquote\"\u003e\"Humic substances at agronomic concentrations show consistent positive effects on plant growth — an effect remarkably stable across species and growing conditions.\" — Canellas et al., 2015\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-refs\"\u003e\n      \u003ch4\u003eScientific references\u003c\/h4\u003e\n      \u003col\u003e\n        \u003cli\u003eCanellas, L.P. et al. (2015). Humic and fulvic acids as biostimulants in horticulture. \u003cem\u003eScientia Horticulturae\u003c\/em\u003e, 196, 15–27.\u003c\/li\u003e\n        \u003cli\u003eNardi, S. et al. (2009). Plant biostimulants: physiological responses induced by protein hydrolysed-based products and humic substances in plant metabolism. \u003cem\u003eAgronomy for Sustainable Development\u003c\/em\u003e, 29, 263–271.\u003c\/li\u003e\n        \u003cli\u003eRose, M.T. et al. (2014). A meta-analysis and review of plant-growth response to humic substances. \u003cem\u003eAdvances in Agronomy\u003c\/em\u003e, 124, 37–89.\u003c\/li\u003e\n        \u003cli\u003ePiccolo, A. (2002). The supramolecular structure of humic substances: a novel understanding of humus chemistry. \u003cem\u003eAdvances in Agronomy\u003c\/em\u003e, 75, 57–134.\u003c\/li\u003e\n        \u003cli\u003eStevenson, F.J. (1994). \u003cem\u003eHumus Chemistry: Genesis, Composition, Reactions\u003c\/em\u003e. Wiley.\u003c\/li\u003e\n        \u003cli\u003eChen, Y. \u0026amp; Aviad, T. (1990). Effects of humic substances on plant growth. In: \u003cem\u003eHumic Substances in Soil and Crop Sciences\u003c\/em\u003e, ASA\/SSSA, 161–186.\u003c\/li\u003e\n        \u003cli\u003eYildirim, E. (2007). Foliar and soil fertilization of humic acid affect productivity and quality of tomato. \u003cem\u003eActa Agriculturae Scandinavica B\u003c\/em\u003e, 57, 182–186.\u003c\/li\u003e\n        \u003cli\u003eKarakurt, Y. et al. (2009). The influence of foliar and soil fertilization of humic acid on yield and quality of pepper. \u003cem\u003eActa Agriculturae Scandinavica B\u003c\/em\u003e, 59, 233–237.\u003c\/li\u003e\n        \u003cli\u003eTürkmen, Ö. et al. (2004). Calcium and humic acid affect seed germination, growth, and nutrient content of tomato seedlings under saline soil conditions. \u003cem\u003eActa Agriculturae Scandinavica B\u003c\/em\u003e, 54, 168–174.\u003c\/li\u003e\n        \u003cli\u003eEshghi, S. \u0026amp; Garazhian, M. (2015). Improving growth, yield and fruit quality of strawberry by foliar and soil drench applications of humic acid. \u003cem\u003eIran Agricultural Research\u003c\/em\u003e, 34(1), 14–20.\u003c\/li\u003e\n        \u003cli\u003eShaygan, A. (2024). Drench of humic acid mitigate the adverse impacts of alkalinity on rose. \u003cem\u003eOrnamental Horticulture\u003c\/em\u003e, 30, e242710.\u003c\/li\u003e\n        \u003cli\u003eHartwigsen, J.A. \u0026amp; Evans, M.R. (2000). Humic acid seed and substrate treatments promote seedling root development. \u003cem\u003eHortScience\u003c\/em\u003e, 35(7), 1231–1233.\u003c\/li\u003e\n        \u003cli\u003eKilli, F. (2004). Effects of potassium humate solution and soaking periods on germination characteristics of undelinted cotton seeds. \u003cem\u003eJournal of Environmental Biology\u003c\/em\u003e, 25, 395–398.\u003c\/li\u003e\n        \u003cli\u003eKadhim, J.J. \u0026amp; Hamza, J.H. (2021). Effect of maize seeds soaking with acids of ascorbic, citric and humic on field emergence. \u003cem\u003eIraqi Journal of Agricultural Sciences\u003c\/em\u003e, 52(4), 971–976.\u003c\/li\u003e\n        \u003cli\u003eAzhar, T.S. (2026). Effect of seed treatment with salicylic acid, humic acid and zinc on the growth rate of broad bean seedlings (\u003cem\u003eVicia faba\u003c\/em\u003e L.). \u003cem\u003ePlant Science Today\u003c\/em\u003e, 13(1).\u003c\/li\u003e\n        \u003cli\u003eMa, Y., Cheng, X. \u0026amp; Zhang, Y. (2024). The impact of humic acid fertilizers on crop yield and nitrogen use efficiency: a meta-analysis. \u003cem\u003eAgronomy\u003c\/em\u003e, 14(12), 2763.\u003c\/li\u003e\n      \u003c\/ol\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════════ TAB 3: HOW TO USE ═══════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-ha-panel3\"\u003e\n    \u003ch2\u003eHow to use humic acid flakes: peer-reviewed rates for foliar, drench, seed soak and compost tea\u003c\/h2\u003e\n\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorking with the flakes\u003c\/span\u003e\u003cp\u003eWeigh the flakes against the rate in the relevant card below, add to the volume of water required, and stir. They dissolve completely within 2–5 minutes in warm water and within 10 minutes in cold. There is no sediment, no settling step, and no residue to manage. The solution will be very dark but completely clear. Apply on the same day you mix it — extended storage allows microbial activity to develop in the bucket.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-callout\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eStaining warning\u003c\/span\u003e\u003cp\u003eThe solution stains porous surfaces — paving, concrete, grout, light-coloured clothing, and timber. Work over soil or grass. Rinse spills on hard surfaces immediately.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003ch3\u003eFoliar spray\u003c\/h3\u003e\n    \u003cp\u003eFoliar application delivers humic acid directly to leaf tissue, where the auxin-like response is fastest. Yildirim (2007) found 20 ml\/L of commercial liquid humate sprayed at 10-day intervals optimum for tomato, with Karakurt et al. (2009) confirming the same window for pepper. Eshghi and Garazhian (2015) identified 600–900 mg\/L (active humic acid) as the strawberry sweet spot, with declining returns above 1000 mg\/L. Commercial protocols summarised by Alsultana suggest 0.1–0.3% active concentration depending on crop sensitivity. Concentrations expressed below are for 70% humic acid flakes.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eTomato, pepper, aubergine, cucurbits\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 g flakes per litre of water (≈350 mg\/L humic acid)  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 10–14 days from 4-leaf stage through fruit development\u003c\/div\u003e\n\u003cp\u003eSpray both leaf surfaces to runoff in early morning or late evening. Yildirim (2007) recorded the highest yield, fruit weight, and ascorbic acid content at this concentration window across two seasons of greenhouse tomato trials, with sprays at 10-day intervals from three weeks after planting.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eStrawberries and soft fruit\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.85 g flakes per litre (≈600 mg\/L humic acid)  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 10–14 days from first flower through harvest\u003c\/div\u003e\n\u003cp\u003eEshghi and Garazhian (2015) identified 600 mg\/L as the lower bound and 900 mg\/L as the upper bound of the optimum foliar window for strawberry. Both produced the highest dry shoot and root mass, with significant improvements in fruit ascorbic acid and total soluble solids over control.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eLeafy vegetables and salad crops\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.25 g flakes per litre (≈175 mg\/L humic acid)  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 7–10 days from 4 true leaves to harvest\u003c\/div\u003e\n\u003cp\u003eLeafy crops respond at gentler concentrations and benefit from more frequent, lighter applications. Stay at the lower end of the rate range — higher concentrations risk leaf marking on thin-leaved crops.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eRoses, ornamentals and shrubs\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 g flakes per litre (≈350 mg\/L humic acid)  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 14 days through active growth\u003c\/div\u003e\n\u003cp\u003eFoliar application supports flower colour and stem vigour, particularly on roses growing in alkaline soils where iron uptake is restricted. For stressed plants, combine with the soil drench programme below.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eCereals, field crops and lawns\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.7 g flakes per litre (≈500 mg\/L humic acid)  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 14–21 days\u003c\/div\u003e\n\u003cp\u003eThe Ma et al. (2024) meta-analysis of humic acid across cereal trials confirms the strongest response at 100–200 kg N\/ha programmes, with cash crops and upland cereals out-responding paddy rice. For lawns, deliver via knapsack sprayer at standard turf coverage rates.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n\n    \u003ch3\u003eSoil drench\u003c\/h3\u003e\n    \u003cp\u003eDrench delivers humic acid into the active root zone where it builds CEC, stimulates microbial biomass, and provides the auxin-like signal that drives lateral root development. Eshghi and Garazhian (2015) optimised strawberry drenches at 300–450 mg\/L active humic acid every 14 days. The literature consensus is for monthly application at moderate strength, stepped up to 14-day intervals on stressed plants or alkaline soils.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eGeneral vegetable garden and allotment\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 g flakes per litre (≈350 mg\/L humic acid)  ·  \u003cstrong\u003eVolume:\u003c\/strong\u003e 500 ml–1 L per medium plant  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 3–4 weeks\u003c\/div\u003e\n\u003cp\u003eApply to moist soil around the root zone. Skip applications when soil is dry or plants are heat-stressed — wait for the soil to be moist first.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eStrawberries, soft fruit, fruiting containers\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 g flakes per litre (≈350 mg\/L humic acid)  ·  \u003cstrong\u003eVolume:\u003c\/strong\u003e 250 ml per 3 L pot, scaled up  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 14 days\u003c\/div\u003e\n\u003cp\u003eThis matches the Eshghi and Garazhian (2015) optimal soil treatment for cultivar Paros strawberry: significant gains in fruit number, total yield, and ascorbic acid against control. The 14-day interval was the trial schedule.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eRoses and ornamentals on alkaline or stressed soils\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 1.4 g flakes per litre (≈1000 mg\/L humic acid)  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 14 days through the growing season\u003c\/div\u003e\n\u003cp\u003eShaygan (2024) demonstrated that 1000 mg\/L drenches every 15 days for two months on rose under alkaline stress lifted total protein, proline, and antioxidant activity above control, with sugar content peaking at 500 mg\/L. The higher rate is the stress-management option — drop back to 500 mg\/L (0.7 g flakes per litre) once vigour returns.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eTransplant drench\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.7 g flakes per litre (≈500 mg\/L humic acid)  ·  \u003cstrong\u003eVolume:\u003c\/strong\u003e 300–500 ml per planting hole  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Once at planting; repeat after 14 days\u003c\/div\u003e\n\u003cp\u003eApply directly into the planting hole before setting the root ball. Auxin-like root stimulation typically appears within 48–72 hours, with significant reductions in transplant shock and faster establishment recorded in the Canellas et al. (2015) review.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eContainer and peat-free compost conditioning\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.7 g flakes per litre (≈500 mg\/L humic acid)  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 14–21 days\u003c\/div\u003e\n\u003cp\u003ePeat-free media is naturally low in humic substances. Regular drenches replenish humic content, raise CEC of the growing medium so it holds nutrients more like a peat-based mix, and extend compost working life. Particularly valuable in season-long container crops.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n\n    \u003ch3\u003eSeed soak (pre-sowing treatment)\u003c\/h3\u003e\n    \u003cp\u003ePre-sowing seed treatment with humic acid is one of the best-evidenced uses of the material. Kadhim and Hamza (2021) recommend maize seeds soaked at 1 ml\/L of commercial humate for 18 hours before spring sowing — significant gains in emergence percentage, seedling root length, and seedling vigour. Killi (2004) confirmed 16-hour soak as optimal for cotton in potassium humate solution. Across cereals, legumes, and vegetables, the literature points to dilute concentrations and longer soak times rather than concentrated short dips.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eTomato, pepper, aubergine, cucurbits\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.3 g flakes per litre (≈210 mg\/L humic acid)  ·  \u003cstrong\u003eSoak time:\u003c\/strong\u003e 4–8 hours\u003c\/div\u003e\n\u003cp\u003eSoak seeds at room temperature in a shallow dish. Sow immediately afterwards — do not redry. Faster germination and stronger first true leaves are the typical response.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eCereals, maize and wheat\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 g flakes per litre (≈350 mg\/L humic acid)  ·  \u003cstrong\u003eSoak time:\u003c\/strong\u003e 12–18 hours\u003c\/div\u003e\n\u003cp\u003eThis matches the Kadhim and Hamza (2021) protocol for spring maize on cultivars Baghdad3, 5018 and Sumer. Drain seeds briefly before sowing — do not redry. The longer soak time reflects cereal seed coat permeability.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eBeans, peas and other legumes\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.3 g flakes per litre (≈210 mg\/L humic acid)  ·  \u003cstrong\u003eSoak time:\u003c\/strong\u003e 6–12 hours\u003c\/div\u003e\n\u003cp\u003eAzhar (2026) evaluated faba bean (cultivar Barcino) seed treatments at 100–300 mg\/L active humic acid, with response peaking in the middle of that range for germination index and seedling vigour. Do not exceed 12 hours — legume seeds split with prolonged soaking.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eSalad and leafy greens\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.15 g flakes per litre (≈100 mg\/L humic acid)  ·  \u003cstrong\u003eSoak time:\u003c\/strong\u003e 2–4 hours\u003c\/div\u003e\n\u003cp\u003eSmall seeds need the lightest treatment. A 2–4 hour soak in the dilute solution lifts germination uniformity without risk of inhibition.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFlowers and ornamentals\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.3 g flakes per litre (≈210 mg\/L humic acid)  ·  \u003cstrong\u003eSoak time:\u003c\/strong\u003e 4–12 hours, depending on seed size\u003c\/div\u003e\n\u003cp\u003eHartwigsen and Evans (2000) demonstrated significant root development gains in marigold and geranium from pre-sowing humate seed soak. Adjust soak time to seed size — small seeds 4 hours, larger seeds up to 12.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n\n    \u003ch3\u003eCompost tea\u003c\/h3\u003e\n    \u003cp\u003eHumic acid added during compost tea brewing serves two purposes: it binds chlorine and chloramine in mains water (protecting the microbial population in the tea), and it acts as a food source that documented research shows stimulates fungal biomass during the brew. Crophealth research used 30 ml of liquid humic extract per 15 L of standard recipe — broadly equivalent to a few grams of these flakes scaled to brew volume.\u003c\/p\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eStandard 20 L aerated compost tea brew\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 2–3 g flakes per 20 L of brew water  ·  \u003cstrong\u003eTiming:\u003c\/strong\u003e Add at the start, before compost goes in\u003c\/div\u003e\n\u003cp\u003eDissolve the flakes into the water first and let the brewer run for 5–10 minutes — this binds chlorine in mains water before the microbial inoculant arrives. Then add compost, kelp, fish hydrolysate, or whichever other ingredients your recipe uses. Brew at 18–24°C for 18–24 hours and apply within 4 hours of switching off the air pump.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eSmall batch (5 L watering can brew)\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 g flakes per 5 L brew water  ·  \u003cstrong\u003eTiming:\u003c\/strong\u003e Add at the start of the brew\u003c\/div\u003e\n\u003cp\u003eFor aerated bucket-scale brews or steeped (non-aerated) compost extracts. Same protocol — dissolve, wait briefly, then add compost.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003chr class=\"drf-sep\"\u003e\n\n    \u003ch3\u003eFertigation and combined liquid feed\u003c\/h3\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eFertigation and drip irrigation\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 g flakes per litre of reservoir water (≈350 mg\/L humic acid)  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every 3–4 weeks\u003c\/div\u003e\n\u003cp\u003eAdd the dissolved flakes to the reservoir after the main nutrient solution is mixed. Compatible with all liquid nutrient programmes. Because the flakes are fully soluble, emitters will not clog at these rates.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-rate\"\u003e\n\u003ch4\u003eCombined with liquid feed\u003c\/h4\u003e\n\u003cdiv class=\"drf-rate-meta\"\u003e\n\u003cstrong\u003eRate:\u003c\/strong\u003e 0.5 g flakes per litre of diluted feed  ·  \u003cstrong\u003eFrequency:\u003c\/strong\u003e Every feeding, or alternate feedings\u003c\/div\u003e\n\u003cp\u003eHumic acid enhances uptake efficiency of every mineral in the feed. Always add the dissolved flakes to the already-diluted feed, not to undiluted concentrate, to avoid precipitation.\u003c\/p\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-callout drf-callout-gold\"\u003e\n\u003cspan class=\"drf-callout-title\"\u003eWorks well combined with\u003c\/span\u003e\u003cp\u003ePair with \u003cstrong\u003eFulvic Acid Powder\u003c\/strong\u003e in every liquid feed for complete humic-plus-fulvic coverage — humic works in the soil, fulvic works inside the plant. Stack with \u003cstrong\u003eSeaweed Powder\u003c\/strong\u003e for biostimulant compounding: seaweed delivers cytokinins and auxins, humic improves uptake and soil biology. Fully compatible with all Dr Forest crop-specific fertilisers as a general efficiency booster.\u003c\/p\u003e\n\u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- ═══════════════ TAB 4: FAQ ═══════════════ --\u003e\n  \u003cdiv class=\"drf-panel\" id=\"drf-ha-panel4\"\u003e\n    \u003ch2\u003eFrequently asked questions about humic acid flakes\u003c\/h2\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq1\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq1\"\u003eDoes humic acid replace fertiliser?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eNo. Humic acid is a soil conditioner and nutrient efficiency enhancer, not a primary nutrient source. It improves how effectively soil holds and delivers nutrients from existing reserves, added fertilisers, or organic matter decomposition. It multiplies the value of the fertiliser you already apply rather than replacing it. The Ma et al. (2024) meta-analysis quantifies the average crop yield gain at 12% and the nitrogen use efficiency gain at 27% across studies.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq2\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq2\"\u003eFoliar, drench, seed soak or compost tea — which should I use?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eIf you are starting one programme: monthly soil drench is the highest-leverage use, because it builds CEC and microbial biomass in the root zone where most of the work happens. Add foliar spray every 10–14 days during fruit set on tomato, pepper, and strawberry — the auxin-like response is fastest through the leaf. Pre-sowing seed soak is a once-per-crop investment with documented gains in germination uniformity. Compost tea is the smallest dose but a useful place to start binding chlorine and feeding fungal biomass during brewing. Most growers run drench plus foliar through the season, and add seed soak and compost tea as habit develops.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq3\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq3\"\u003eWhy choose fully soluble flakes over other humate products?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eMany humate products sold as \"soluble\" are only 80–90% soluble, leaving 10–20% as insoluble residue. In open soil that residue eventually breaks down and contributes value, but for drip emitters, spray nozzles, or any automated dosing system it causes blockage. These flakes dissolve to complete clarity within minutes, delivering the full humic content in fully dissolved, immediately bioavailable form with no residue to manage.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq4\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq4\"\u003eHow quickly will I see results?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eEffects are cumulative. The fastest response is in transplants and seed-soak crops — root improvements visible within two weeks. In established plants, meaningful improvements in vigour and colour typically appear after two or three applications over 6–8 weeks. Soil structure and microbial effects build over seasons rather than weeks, and the full value of humic acid is seen in year-two and year-three results.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq5\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq5\"\u003eCan I exceed the recommended rates? More must be better, surely?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eNo — the response curve is bell-shaped, not linear. Eshghi and Garazhian (2015) found 1200 mg\/L produced no better strawberry yield than 600 mg\/L. Some studies (Türkmen et al., on tomato) report that very high rates can arrest growth or reduce nutrient uptake. Stick to the rates in the cards above and apply more frequently rather than more strongly.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq6\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq6\"\u003eHow does this compare to fulvic acid powder?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eThey are complementary, not interchangeable. Humic acid works in the soil — building structure, CEC, and microbial biomass. Fulvic acid works inside the plant — chelating minerals and delivering them through cell membranes. The ideal programme uses both: humic acid as a monthly soil drench, fulvic acid added to every liquid feed and foliar spray. Running both together is measurably more effective than either alone.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq7\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq7\"\u003eWhat is the difference between leonardite humates and lignosulphonate?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003ePotassium lignosulphonate is an industrial byproduct of paper manufacturing — processed lignin made water-soluble by chemical treatment. Lignin is a precursor to humic substances, but full conversion to true humic acid takes geological time. Lignosulphonate has not undergone that process. Leonardite humic acid is the genuine end product, with the abundant carboxyl and hydroxyl functional groups that give it its high CEC, chelation capacity, and fungal stimulant properties. If a product does not state a humic acid percentage or lists lignosulphonate as its active ingredient, it is not true humic acid.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq8\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq8\"\u003eIs it safe for children, pets, bees and edible crops?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eYes. Leonardite humic acid is a naturally occurring organic substance with no known toxicity to mammals, birds, bees, or soil invertebrates at any realistic application rate. There is no withholding period for edible crops. Store flakes and made-up solution securely out of reach, and wash hands after handling the concentrate — mainly because of strong staining rather than any toxicity concern.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq9\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq9\"\u003eCan I store made-up solution?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eUse within the same day. The humic acid itself is stable, but as soon as it goes into water it provides a carbon food source that supports microbial activity in the bucket. Mix what you need, apply it, and rinse the container.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n    \u003cdiv class=\"drf-faq\"\u003e\n\u003cinput type=\"checkbox\" id=\"drf-ha-faq10\"\u003e\u003clabel class=\"drf-faq-q\" for=\"drf-ha-faq10\"\u003eHow should I store the dry flakes?\u003c\/label\u003e\u003cdiv class=\"drf-faq-a\"\u003e\u003cdiv\u003eStore in the original sealed bag or an airtight container in a cool, dry place away from direct sunlight and moisture. The flakes are hygroscopic and will absorb moisture if left open, which can soften or clump them — this does not affect efficacy but makes weighing harder. Reseal after each use. Dry shelf life is at least two years.\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- ═══════════════ INLINE STRUCTURED DATA (Product + FAQPage + HowTo) ═══════════════ --\u003e\n\u003c!-- Embedded JSON-LD travels with the product description. Do NOT paste these schemas separately elsewhere. --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"FAQPage\",\n      \"@id\": \"https:\/\/www.drforest.co.uk\/products\/humic-acid-flakes#faq\",\n      \"about\": {\n        \"@id\": \"https:\/\/www.drforest.co.uk\/products\/humic-acid-flakes#product\"\n      },\n      \"mainEntity\": [\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Does humic acid replace fertiliser?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"No. Humic acid is a soil conditioner and nutrient efficiency enhancer, not a primary nutrient source. It improves how effectively soil holds and delivers nutrients from existing reserves, added fertilisers, or organic matter decomposition. It multiplies the value of the fertiliser you already apply rather than replacing it. The Ma et al. (2024) meta-analysis quantifies the average crop yield gain at 12% and the nitrogen use efficiency gain at 27% across studies.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Foliar, drench, seed soak or compost tea — which should I use?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"If you are starting one programme: monthly soil drench is the highest-leverage use, because it builds CEC and microbial biomass in the root zone where most of the work happens. Add foliar spray every 10–14 days during fruit set on tomato, pepper, and strawberry — the auxin-like response is fastest through the leaf. Pre-sowing seed soak is a once-per-crop investment with documented gains in germination uniformity. Compost tea is the smallest dose but a useful place to start binding chlorine and feeding fungal biomass during brewing. Most growers run drench plus foliar through the season, and add seed soak and compost tea as habit develops.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Why choose fully soluble flakes over other humate products?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Many humate products sold as \\\"soluble\\\" are only 80–90% soluble, leaving 10–20% as insoluble residue. In open soil that residue eventually breaks down and contributes value, but for drip emitters, spray nozzles, or any automated dosing system it causes blockage. These flakes dissolve to complete clarity within minutes, delivering the full humic content in fully dissolved, immediately bioavailable form with no residue to manage.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"How quickly will I see results?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Effects are cumulative. The fastest response is in transplants and seed-soak crops — root improvements visible within two weeks. In established plants, meaningful improvements in vigour and colour typically appear after two or three applications over 6–8 weeks. Soil structure and microbial effects build over seasons rather than weeks, and the full value of humic acid is seen in year-two and year-three results.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can I exceed the recommended rates? More must be better, surely?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"No — the response curve is bell-shaped, not linear. Eshghi and Garazhian (2015) found 1200 mg\/L produced no better strawberry yield than 600 mg\/L. Some studies (Türkmen et al., on tomato) report that very high rates can arrest growth or reduce nutrient uptake. Stick to the rates in the cards above and apply more frequently rather than more strongly.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"How does this compare to fulvic acid powder?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"They are complementary, not interchangeable. Humic acid works in the soil — building structure, CEC, and microbial biomass. Fulvic acid works inside the plant — chelating minerals and delivering them through cell membranes. The ideal programme uses both: humic acid as a monthly soil drench, fulvic acid added to every liquid feed and foliar spray. Running both together is measurably more effective than either alone.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"What is the difference between leonardite humates and lignosulphonate?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Potassium lignosulphonate is an industrial byproduct of paper manufacturing — processed lignin made water-soluble by chemical treatment. Lignin is a precursor to humic substances, but full conversion to true humic acid takes geological time. Lignosulphonate has not undergone that process. Leonardite humic acid is the genuine end product, with the abundant carboxyl and hydroxyl functional groups that give it its high CEC, chelation capacity, and fungal stimulant properties. If a product does not state a humic acid percentage or lists lignosulphonate as its active ingredient, it is not true humic acid.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Is it safe for children, pets, bees and edible crops?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Yes. Leonardite humic acid is a naturally occurring organic substance with no known toxicity to mammals, birds, bees, or soil invertebrates at any realistic application rate. There is no withholding period for edible crops. Store flakes and made-up solution securely out of reach, and wash hands after handling the concentrate — mainly because of strong staining rather than any toxicity concern.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"Can I store made-up solution?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Use within the same day. The humic acid itself is stable, but as soon as it goes into water it provides a carbon food source that supports microbial activity in the bucket. Mix what you need, apply it, and rinse the container.\"\n          }\n        },\n        {\n          \"@type\": \"Question\",\n          \"name\": \"How should I store the dry flakes?\",\n          \"acceptedAnswer\": {\n            \"@type\": \"Answer\",\n            \"text\": \"Store in the original sealed bag or an airtight container in a cool, dry place away from direct sunlight and moisture. The flakes are hygroscopic and will absorb moisture if left open, which can soften or clump them — this does not affect efficacy but makes weighing harder. Reseal after each use. Dry shelf life is at least two years.\"\n          }\n        }\n      ]\n    },\n    {\n      \"@type\": \"HowTo\",\n      \"@id\": \"https:\/\/www.drforest.co.uk\/products\/humic-acid-flakes#howto\",\n      \"name\": \"How to apply humic acid flakes\",\n      \"description\": \"Peer-reviewed application rates and methods for premium leonardite humic acid flakes (70% humic acid, 100% water soluble). Covers foliar spray, soil drench, pre-sowing seed soak and compost tea brewing across vegetables, fruit, ornamentals and cereals.\",\n      \"about\": {\n        \"@id\": \"https:\/\/www.drforest.co.uk\/products\/humic-acid-flakes#product\"\n      },\n      \"supply\": [\n        {\n          \"@type\": \"HowToSupply\",\n          \"name\": \"Humic Acid Flakes (70% humic acid)\"\n        },\n        {\n          \"@type\": \"HowToSupply\",\n          \"name\": \"Water (room temperature, ideally non-chlorinated for compost tea)\"\n        }\n      ],\n      \"tool\": [\n        {\n          \"@type\": \"HowToTool\",\n          \"name\": \"Digital kitchen scales (0.1 g resolution)\"\n        },\n        {\n          \"@type\": \"HowToTool\",\n          \"name\": \"Bucket or jug for dissolving\"\n        },\n        {\n          \"@type\": \"HowToTool\",\n          \"name\": \"Watering can, fine-mist sprayer or fertigation system\"\n        }\n      ],\n      \"step\": [\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Foliar spray\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Tomato, pepper, aubergine and cucurbits\",\n              \"text\": \"Dissolve 0.5 g of flakes per litre of water (approximately 350 mg\/L active humic acid). Spray both leaf surfaces to runoff every 10–14 days from 4-leaf stage through fruit development, applied in early morning or late evening. Based on Yildirim (2007) optimum for greenhouse tomato.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Strawberries and soft fruit\",\n              \"text\": \"Dissolve 0.85 g of flakes per litre (approximately 600 mg\/L active humic acid). Spray every 10–14 days from first flower through harvest. Based on Eshghi and Garazhian (2015) foliar optimum for cultivar Paros strawberry.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Leafy vegetables and salad crops\",\n              \"text\": \"Dissolve 0.25 g of flakes per litre (approximately 175 mg\/L active humic acid). Spray every 7–10 days from 4 true leaves to harvest. Stay at the lower end of the rate range to avoid leaf marking on thin-leaved crops.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Roses, ornamentals and shrubs\",\n              \"text\": \"Dissolve 0.5 g of flakes per litre (approximately 350 mg\/L active humic acid). Spray every 14 days through active growth. Supports flower colour and iron uptake on roses growing in alkaline soils.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Cereals, field crops and lawns\",\n              \"text\": \"Dissolve 0.7 g of flakes per litre (approximately 500 mg\/L active humic acid). Apply every 14–21 days via knapsack sprayer. Strongest response when paired with 100–200 kg N\/ha programmes (Ma et al., 2024).\"\n            }\n          ]\n        },\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Soil drench\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"General vegetable garden and allotment\",\n              \"text\": \"Dissolve 0.5 g of flakes per litre. Apply 500 ml to 1 L of solution per medium plant to moist soil around the root zone every 3–4 weeks. Skip applications when soil is dry or plants are heat-stressed.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Strawberries, soft fruit and fruiting containers\",\n              \"text\": \"Dissolve 0.5 g of flakes per litre. Apply 250 ml per 3 L pot (scaled up for larger containers) every 14 days. Matches the Eshghi and Garazhian (2015) optimal drench protocol.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Roses and ornamentals on alkaline or stressed soils\",\n              \"text\": \"Dissolve 1.4 g of flakes per litre (approximately 1000 mg\/L active humic acid). Apply every 14 days through the growing season. Drop back to 0.7 g\/L once vigour returns. Based on Shaygan (2024) rose drench protocol.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Transplant drench\",\n              \"text\": \"Dissolve 0.7 g of flakes per litre. Apply 300–500 ml directly into the planting hole before setting the root ball. Repeat after 14 days. Auxin-like root stimulation typically appears within 48–72 hours.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Container and peat-free compost conditioning\",\n              \"text\": \"Dissolve 0.7 g of flakes per litre. Drench the container every 14–21 days to replenish humic content and raise the CEC of peat-free media.\"\n            }\n          ]\n        },\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Pre-sowing seed soak\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Tomato, pepper, aubergine and cucurbits\",\n              \"text\": \"Dissolve 0.3 g of flakes per litre. Soak seeds at room temperature for 4–8 hours. Sow immediately afterwards — do not redry.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Cereals, maize and wheat\",\n              \"text\": \"Dissolve 0.5 g of flakes per litre. Soak seeds for 12–18 hours. Drain briefly before sowing — do not redry. Based on Kadhim and Hamza (2021) maize protocol.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Beans, peas and other legumes\",\n              \"text\": \"Dissolve 0.3 g of flakes per litre. Soak seeds for 6–12 hours. Do not exceed 12 hours — legume seeds split with prolonged soaking. Based on Azhar (2026) faba bean protocol.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Salad and leafy greens\",\n              \"text\": \"Dissolve 0.15 g of flakes per litre. Soak small seeds for 2–4 hours. Lifts germination uniformity without inhibition risk.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Flowers and ornamentals\",\n              \"text\": \"Dissolve 0.3 g of flakes per litre. Soak for 4 hours (small seeds) up to 12 hours (larger seeds). Based on Hartwigsen and Evans (2000) marigold and geranium protocols.\"\n            }\n          ]\n        },\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Compost tea brewing\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Standard 20 L aerated compost tea brew\",\n              \"text\": \"Dissolve 2–3 g of flakes per 20 L of brew water at the start, before adding compost. Run the brewer for 5–10 minutes to bind chlorine in mains water before the microbial inoculant arrives. Then add compost, kelp or fish hydrolysate. Brew at 18–24°C for 18–24 hours and apply within 4 hours of switching off the air pump.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Small batch (5 L watering-can brew)\",\n              \"text\": \"Dissolve 0.5 g of flakes per 5 L brew water at the start of the brew. Same protocol — dissolve, wait briefly, then add compost.\"\n            }\n          ]\n        },\n        {\n          \"@type\": \"HowToSection\",\n          \"name\": \"Fertigation and combined liquid feed\",\n          \"itemListElement\": [\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Fertigation and drip irrigation\",\n              \"text\": \"Dissolve 0.5 g of flakes per litre of reservoir water. Add to the reservoir after the main nutrient solution is mixed. Apply every 3–4 weeks. Compatible with all liquid nutrient programmes.\"\n            },\n            {\n              \"@type\": \"HowToStep\",\n              \"name\": \"Combined with liquid feed\",\n              \"text\": \"Dissolve 0.5 g of flakes per litre of already-diluted feed. Always add to the diluted feed, never to undiluted concentrate, to avoid precipitation. Apply every feeding or alternate feedings.\"\n            }\n          ]\n        }\n      ]\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Dr Forest","offers":[{"title":"1kg","offer_id":55997517496694,"sku":"5065024846176","price":16.99,"currency_code":"GBP","in_stock":true},{"title":"500g","offer_id":55997517529462,"sku":"5065024846169","price":12.49,"currency_code":"GBP","in_stock":true},{"title":"250g","offer_id":56115344212342,"sku":"5065024846152","price":7.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0049\/8194\/8504\/files\/humic-acid-granules-70-85-soluble-premium-bio-stimulant-521.webp?v=1772229719","url":"https:\/\/www.drforest.co.uk\/products\/humic-acid-flakes","provider":"Dr Forest","version":"1.0","type":"link"}