{"id":882,"date":"2026-09-11T09:26:30","date_gmt":"2026-09-11T01:26:30","guid":{"rendered":"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid-crystal\/"},"modified":"2026-09-16T19:36:56","modified_gmt":"2026-09-16T11:36:56","slug":"insoluble-humic-acid-crystal","status":"publish","type":"product_item","link":"https:\/\/www.jingfenggroup.com\/zh\/insoluble-humic-acid\/insoluble-humic-acid-crystal\/","title":{"rendered":"Insoluble Humic Acid Crystal \u2013 60% Humic Acid, 2\u20134 mm Irregular Granule"},"content":{"rendered":"<style>\n\/* \u57fa\u7840\u91cd\u7f6e + \u5168\u5c40\u5e73\u6ed1\u6eda\u52a8\uff08\u951a\u70b9\u515c\u5e95\uff09 *\/\nhtml{scroll-behavior:smooth;scroll-padding-top:78px;}\n.jf-wrap{max-width:1140px;margin:0 auto;padding:0 16px;box-sizing:border-box;}\n.jf-wrap *{box-sizing:border-box;}\n\/* \u9690\u85cf\u4e3b\u9898\u81ea\u52a8\u63d2\u5165\u7684 Table of contents\uff08\u4e0e\u60ac\u6d6e\u951a\u70b9\u5bfc\u822a\u91cd\u590d\uff09 *\/\n.toc-box{display:none 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11px;font-size:13px;font-weight:600;color:#004d4d;line-height:1.35}.jf-rel-strip::-webkit-scrollbar{height:8px}.jf-rel-strip::-webkit-scrollbar-thumb{background:#cfe3e3;border-radius:8px}.jf-rel-img{display:block;aspect-ratio:1\/1;background:#f5fafa;overflow:hidden}.jf-rel-img img{width:100%;height:100%;object-fit:cover;display:block}.jf-rel-thumb .t{display:block;padding:9px 11px;font-size:13px;font-weight:600;color:#004d4d;line-height:1.35}.jf-rel-strip{display:flex;gap:14px;overflow-x:auto;padding:6px 2px 14px;-webkit-overflow-scrolling:touch;scrollbar-width:thin}.jf-rel-strip::-webkit-scrollbar{height:8px}.jf-rel-strip::-webkit-scrollbar-thumb{background:#cfe3e3;border-radius:8px}.jf-rel-thumb{flex:0 0 152px;display:block;text-decoration:none;background:#fff;border:1px solid #e3eded;border-radius:12px;overflow:hidden;transition:.15s}.jf-rel-thumb:hover{border-color:#008080;box-shadow:0 6px 16px rgba(0,77,77,.10);transform:translateY(-2px)}.jf-rel-img{display:block;aspect-ratio:1\/1;background:#f5fafa;overflow:hidden}.jf-rel-img img{width:100%;height:100%;object-fit:cover;display:block}.jf-rel-thumb .t{display:block;padding:9px 11px;font-size:13px;font-weight:600;color:#004d4d;line-height:1.35}<\/style>\n<div class=\"jf-wrap\">\n<nav class=\"jf-nav\">\n<a href=\"#overview\">Overview<\/a><br \/>\n<a href=\"#benefits\">Benefits<\/a><br \/>\n<a href=\"#specs\">Specs<\/a><br \/>\n<a href=\"#docs\">Documents<\/a><br \/>\n<a href=\"#solubility\">Form<\/a><br \/>\n<a href=\"#applications\">Applications<\/a><br \/>\n<a href=\"#packaging\">Packaging<\/a><br \/>\n<a href=\"#cases\">Cases<\/a><br \/>\n<a href=\"#faq\">FAQ<\/a><br \/>\n<\/nav>\n<div class=\"jf-hero\">\n<div class=\"jf-hero-eyebrow\">INSOLUBLE HUMIC ACID &middot; NATURAL CRYSTAL<\/div>\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h1-crystal, .wp-block-kadence-advancedheading.kt-adv-headingkb-h1-crystal[data-kb-block=\"kb-adv-headingkb-h1-crystal\"]{font-size:33px;font-style:normal;color:#ffffff;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h1-crystal mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h1-crystal[data-kb-block=\"kb-adv-headingkb-h1-crystal\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h1-crystal img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h1-crystal[data-kb-block=\"kb-adv-headingkb-h1-crystal\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-headingkb-h1-crystal, .wp-block-kadence-advancedheading.kt-adv-headingkb-h1-crystal[data-kb-block=\"kb-adv-headingkb-h1-crystal\"]{font-size:26px;}}<\/style>\n<h1 class=\"kt-adv-heading kb-h1-crystal jf-hero-title\">Insoluble Humic Acid Crystal<\/h1>\n<p class=\"jf-hero-tag\">Natural Crystal Humic Acid \u2014 Direct to Soil, No Granulation Required<\/p>\n<div class=\"jf-badges\">\n<span class=\"jf-badge\">Humic acid 60% min<\/span><br \/>\n<span class=\"jf-badge\">CEC 300 meq\/100g<\/span><br \/>\n<span class=\"jf-badge\">Size 2\u20134 mm<\/span><br \/>\n<span class=\"jf-badge\">Code JFHA-HA-C<\/span>\n<\/div>\n<p class=\"jf-hero-lead\"><strong>2\u20134 mm crystal &middot; 60% humic acid &middot; CEC 300 meq\/100g &middot; pH 4.0\u20136.0 &middot; no binder, no additives<\/strong><\/p>\n<\/div>\n<div class=\"jf-sec\" id=\"overview\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-overview, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-overview[data-kb-block=\"kb-adv-headingkb-h2-overview\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-overview mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-overview[data-kb-block=\"kb-adv-headingkb-h2-overview\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-overview img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-overview[data-kb-block=\"kb-adv-headingkb-h2-overview\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Product Overview<\/h2>\n<p><strong>Insoluble Humic Acid Crystal<\/strong> is leonardite selected and sized into natural crystal and irregular granules, without grinding, without binders and without a chemical reaction step. It is the least-processed humic product we make: the material is mined, crushed, screened to 2\u20134 mm and bagged.<\/p>\n<p>Two things follow from that. First, the humic acid content is high \u2014 <strong>60% minimum<\/strong> \u2014 because nothing has been diluted out of it. Second, the <strong>cation exchange capacity is 300 meq\/100 g minimum<\/strong>, which is the number that actually matters for nutrient holding in a sandy or low-organic soil.<\/p>\n<p>The pH sits at <strong>4.0\u20136.0<\/strong>, noticeably more acidic than our powder or granule grades. That is not a defect; it is the natural character of high-humic leonardite crystal, and it makes the grade a useful choice on alkaline and calcareous ground where growers are fighting high pH rather than low.<\/p>\n<p><strong>Insoluble Humic Acid Crystal<\/strong> suits direct soil application where a dust-free, free-flowing particle is wanted \u2014 and premium organic programmes where buyers want to see a natural, minimally processed material on the specification sheet.<\/p>\n<\/div>\n<div class=\"jf-sec\" id=\"benefits\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-benefits, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-benefits[data-kb-block=\"kb-adv-headingkb-h2-benefits\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-benefits mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-benefits[data-kb-block=\"kb-adv-headingkb-h2-benefits\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-benefits img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-benefits[data-kb-block=\"kb-adv-headingkb-h2-benefits\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Key Benefits<\/h2>\n<div class=\"jf-grid\">\n<div class=\"jf-card\">\n<h4>Highest humic content of the insoluble range<\/h4>\n<p>At 60% minimum humic acid, this is the most concentrated insoluble grade we produce. Nothing is added and nothing is extracted, so the analysis reflects the raw seam rather than a blend.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>CEC of 300 meq\/100 g \u2014 the number that holds nutrients<\/h4>\n<p>Cation exchange capacity is what stops potassium, ammonium and trace elements from leaching past the root zone. On sandy or heavily weathered soils, this is the property that pays, more than the humic acid percentage itself.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>Dust-free and free-flowing at 2\u20134 mm<\/h4>\n<p>Sized particles mean no dust cloud on the spreader, no loss to wind, and clean handling. Far more pleasant to work with than a fine powder, particularly for manual or small-equipment application.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>No binders, no additives, no reaction step<\/h4>\n<p>The material is crushed and screened. For organic certification and for buyers who scrutinise input lists, that is a meaningfully shorter story than a granulated product carrying a binder.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>Naturally acidic \u2014 useful on alkaline ground<\/h4>\n<p>At pH 4.0\u20136.0 the crystal helps moderate the rhizosphere on calcareous and sodic soils, where a neutral or alkaline amendment would add to the problem rather than offset it.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>Slow, season-long release<\/h4>\n<p>Being insoluble and granular, the material does not flush through with the first irrigation. It releases into the soil solution gradually, which suits perennial crops and long-season programmes.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"jf-sec\" id=\"specs\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-specs, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-specs[data-kb-block=\"kb-adv-headingkb-h2-specs\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-specs mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-specs[data-kb-block=\"kb-adv-headingkb-h2-specs\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-specs img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-specs[data-kb-block=\"kb-adv-headingkb-h2-specs\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Technical Specification<\/h2>\n<table class=\"jf-tb\">\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Specification<\/th>\n<th>Test standard<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Humic acid (dry basis)<\/td>\n<td>60.0% min<\/td>\n<td>GB\/T 11957-2001<\/td>\n<\/tr>\n<tr>\n<td>Organic carbon (dry basis)<\/td>\n<td>50.0% min<\/td>\n<td>GB\/T 11957-2001<\/td>\n<\/tr>\n<tr>\n<td>Cation exchange capacity<\/td>\n<td>300 meq\/100g min<\/td>\n<td>NY\/T 1121<\/td>\n<\/tr>\n<tr>\n<td>Moisture<\/td>\n<td>30.0% max<\/td>\n<td>GB\/T 11957-2001<\/td>\n<\/tr>\n<tr>\n<td>pH (1:100)<\/td>\n<td>4.0 \u2013 6.0<\/td>\n<td>GB\/T 33804-2017<\/td>\n<\/tr>\n<tr>\n<td>Grain size<\/td>\n<td>2 \u2013 4 mm \/ 1 \u2013 6 mm<\/td>\n<td>Sieve method<\/td>\n<\/tr>\n<tr>\n<td>Fineness<\/td>\n<td>80 \u2013 120 mesh<\/td>\n<td>Sieve method<\/td>\n<\/tr>\n<tr>\n<td>Water solubility<\/td>\n<td>Nil (insoluble by design)<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<tr>\n<td>Appearance<\/td>\n<td>Black crystal \/ irregular granule<\/td>\n<td>Visual<\/td>\n<\/tr>\n<tr>\n<td>Product code<\/td>\n<td>JFHA-HA-C<\/td>\n<td>\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"jf-sub\">Specification values are guaranteed minimums on a dry basis, taken from the batch Certificate of Analysis and tested against the stated Chinese industry standards. Every shipment travels with its own COA stating the tested values.<\/p>\n<div class=\"jf-doc-cta\" id=\"docs\">\n<p class=\"jf-doc-cta-txt\">Need the full Certificate of Analysis, MSDS, or TDS for your formulation or tender file?<\/p>\n<p><a class=\"jf-btn\" href=\"\/contact\/\">Request COA \/ MSDS \/ TDS<\/a>\n<\/div>\n<\/div>\n<div class=\"jf-sec\" id=\"solubility\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-sol, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-sol[data-kb-block=\"kb-adv-headingkb-h2-sol\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-sol mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-sol[data-kb-block=\"kb-adv-headingkb-h2-sol\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-sol img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-sol[data-kb-block=\"kb-adv-headingkb-h2-sol\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Form &amp; Solubility<\/h2>\n<p><strong>Form:<\/strong> black <strong>crystal and irregular granules<\/strong> in the 2\u20134 mm band, with a 1\u20136 mm cut available. Hard, angular, with a faint sheen on the fractured faces. Essentially dust-free.<\/p>\n<p><strong>In water:<\/strong> insoluble. The granules soften and darken the water but do not dissolve \u2014 which is expected and correct. Not for tanks, drip lines or liquid formulations.<\/p>\n<p><strong>Handling:<\/strong> this is the easiest insoluble grade to work with. It flows cleanly through a spreader, does not cake in the bag under normal conditions, and generates no dust \u2014 a real advantage over powder for manual application and for bagged retail product.<\/p>\n<p><strong>In soil:<\/strong> the granule takes up moisture, swells slightly and begins releasing into the soil solution. Breakdown is gradual across the season rather than immediate.<\/p>\n<div class=\"jf-note\"><strong>Honest note:<\/strong> at pH 4.0\u20136.0 this is our most acidic grade. That is an advantage on alkaline and calcareous ground and a poor choice on soil that is already acidic \u2014 in that case the powder or granule grade is the better fit. It is also a premium-priced material: if you simply need organic matter at the lowest cost, the 40% powder does that job for less money.<\/div>\n<h3>Which insoluble grade fits your process?<\/h3>\n<table class=\"jf-tb jf-tb-cmp\">\n<thead>\n<tr>\n<th>Grade<\/th>\n<th>Form<\/th>\n<th>Humic acid<\/th>\n<th>Organic matter<\/th>\n<th>Size<\/th>\n<th>Best for<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-powder-60\/\" target=\"_blank\" rel=\"noopener\"><strong>Humic Acid Powder<\/strong><\/a><\/td>\n<td>80\u2013100 mesh powder<\/td>\n<td>40\u201370%<\/td>\n<td>70\u201382%<\/td>\n<td>80\u2013100 mesh<\/td>\n<td>Granulation feed, soil conditioner base, blending<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-crystal\/\" target=\"_blank\" rel=\"noopener\"><strong>Humic Acid Crystal<\/strong> <em>(this product)<\/em><\/a><\/td>\n<td>2\u20134 mm crystal<\/td>\n<td>60% min<\/td>\n<td>\u2014<\/td>\n<td>2\u20134 \/ 1\u20136 mm<\/td>\n<td>Direct soil application, premium organic blends<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-granule\/\" target=\"_blank\" rel=\"noopener\"><strong>Humic Acid Granule<\/strong><\/a><\/td>\n<td>2\u20134 mm round granule<\/td>\n<td>40% min<\/td>\n<td>60% min<\/td>\n<td>2\u20134 mm<\/td>\n<td>Bulk blending, broadcasting, organic fertilizer<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-prills\/\" target=\"_blank\" rel=\"noopener\"><strong>Humic Acid Prills<\/strong><\/a><\/td>\n<td>2\u20134 mm high-hardness<\/td>\n<td>40% min<\/td>\n<td>60% min<\/td>\n<td>2\u20134 mm<\/td>\n<td>Urea\/blending, mechanical spreading, export<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/microbial-humic-granular-fertilizer\/\" target=\"_blank\" rel=\"noopener\"><strong>Microbial Humic Granule<\/strong><\/a><\/td>\n<td>2\u20134 mm inoculated<\/td>\n<td>40% min<\/td>\n<td>60% min<\/td>\n<td>2\u20134 mm<\/td>\n<td>Bio-organic fertilizer, root-zone inoculation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"jf-sub\">All five grades come from the same leonardite seam and carry the same heavy-metal declaration (Pb, As, Hg, Cd, Cr all below detection, GB 18877). They differ in <em>particle form<\/em> and <em>where they fit in your process<\/em> &mdash; not in origin.<\/p>\n<\/div>\n<div class=\"jf-sec\" id=\"applications\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-apps, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-apps[data-kb-block=\"kb-adv-headingkb-h2-apps\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-apps mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-apps[data-kb-block=\"kb-adv-headingkb-h2-apps\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-apps img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-apps[data-kb-block=\"kb-adv-headingkb-h2-apps\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Applications &amp; Dosage<\/h2>\n<p class=\"jf-lead\">Direct soil application is the primary use. It also works as a visible, identifiable component in premium dry blends:<\/p>\n<table class=\"jf-tb\">\n<thead>\n<tr>\n<th>Application<\/th>\n<th>How to use<\/th>\n<th>Rate<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Direct soil application<\/td>\n<td>Broadcast or band before planting and incorporate. The granular form suits both mechanical spreading and manual application in orchards and vineyards.<\/td>\n<td>300\u2013750 kg\/ha<\/td>\n<\/tr>\n<tr>\n<td>Orchard and vineyard<\/td>\n<td>Apply under the canopy in bands or rings. Season-long release suits permanent crops where cultivation is limited.<\/td>\n<td>500 g \u2013 2 kg per plant<\/td>\n<\/tr>\n<tr>\n<td>Premium organic blends<\/td>\n<td>Blend visibly into a bagged organic fertilizer. Buyers can see and identify the crystal, which supports a premium positioning.<\/td>\n<td>10\u201330% of formulation<\/td>\n<\/tr>\n<tr>\n<td>Alkaline and calcareous soil<\/td>\n<td>Use on high-pH ground where the natural acidity of the crystal helps moderate the root zone.<\/td>\n<td>500\u20131000 kg\/ha<\/td>\n<\/tr>\n<tr>\n<td>Sandy and low-CEC soil<\/td>\n<td>Apply where nutrient leaching is the limiting factor \u2014 the 300 meq\/100 g exchange capacity is the reason to choose this grade over others.<\/td>\n<td>500\u20131000 kg\/ha<\/td>\n<\/tr>\n<tr>\n<td>Turf and landscaping<\/td>\n<td>Apply before laying or as a renovation treatment. Dust-free and easy to spread by hand or with a rotary spreader.<\/td>\n<td>300\u2013500 kg\/ha<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div class=\"jf-sec\" id=\"packaging\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-pack, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-pack[data-kb-block=\"kb-adv-headingkb-h2-pack\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-pack mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-pack[data-kb-block=\"kb-adv-headingkb-h2-pack\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-pack img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-pack[data-kb-block=\"kb-adv-headingkb-h2-pack\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Packaging &amp; Storage<\/h2>\n<table class=\"jf-tb\">\n<thead>\n<tr>\n<th>Pack size<\/th>\n<th>Description<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>20 kg \/ 25 kg<\/td>\n<td>Woven PP bag with inner PE liner \u2014 standard export packing<\/td>\n<\/tr>\n<tr>\n<td>50 kg<\/td>\n<td>Woven PP bag with inner liner \u2014 for high-volume programmes<\/td>\n<\/tr>\n<tr>\n<td>1000\u20131100 kg<\/td>\n<td>Jumbo bag with discharge spout, 4 lifting loops<\/td>\n<\/tr>\n<tr>\n<td>Custom<\/td>\n<td>Private-label printed bag, OEM specification, retail sizes on request<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Storage:<\/strong> Store under cover, on pallets, in a ventilated place. Moisture is up to 30%, so keep it off bare concrete floors.<\/p>\n<p>The granular form is stable and does not break down in storage. Extended exposure to rain will soften the granules and they will consolidate into a mass \u2014 this does not destroy the humic acid but makes the material unpleasant to handle. Keep it dry and it stores indefinitely. Shelf life: 24 months in original, unopened packaging.<\/p>\n<p class=\"jf-sub\">Custom packaging, private-label printing and OEM specifications are available on request. Packaging photos are available in the product gallery.<\/p>\n<\/div>\n<div class=\"jf-sec\" id=\"cases\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-cases, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-cases[data-kb-block=\"kb-adv-headingkb-h2-cases\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-cases mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-cases[data-kb-block=\"kb-adv-headingkb-h2-cases\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-cases img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-cases[data-kb-block=\"kb-adv-headingkb-h2-cases\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Successful Cases<\/h2>\n<div class=\"jf-cases\">\n<a class=\"jf-case\" href=\"\/application\/agriculture\/\"><span class=\"jf-case-tag\">Agriculture &middot; Soil Conditioning<\/span><\/p>\n<h4>Table grape grower, Peru<\/h4>\n<p>Applies 2\u20134 mm crystal at 600 kg\/ha under vine on sandy coastal ground where potassium and ammonium were leaching through the profile. Moved to this grade specifically for the 300 meq\/100 g exchange capacity after two seasons of losing applied nitrogen to irrigation. Reports tighter irrigation scheduling and steadier growth between fertigations.<\/p>\n<p><span class=\"jf-case-more\">Explore humic acid applications &#8594;<\/span><\/a><br \/>\n<a class=\"jf-case\" href=\"\/application\/agriculture\/\"><span class=\"jf-case-tag\">Agriculture &middot; Soil Conditioning<\/span><\/p>\n<h4>Organic fertilizer brand, EU<\/h4>\n<p>Includes the crystal at 15% in a bagged organic fertilizer for the retail garden market. Chose it over a granulated humic product because the visible crystal supports their &#8216;minimally processed input&#8217; story, and because no binder appears on the input list their certifier reviews.<\/p>\n<p><span class=\"jf-case-more\">Explore humic acid applications &#8594;<\/span><\/a>\n<\/div>\n<p class=\"jf-sub\">Full case studies with crop data are published in our application sectors.<\/p>\n<\/div>\n<div class=\"jf-sec\" id=\"faq\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-faq, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-faq[data-kb-block=\"kb-adv-headingkb-h2-faq\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-faq mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-faq[data-kb-block=\"kb-adv-headingkb-h2-faq\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-faq img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-faq[data-kb-block=\"kb-adv-headingkb-h2-faq\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"jf-faq\">\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>What does &#8216;crystal&#8217; mean here \u2014 is it a purified product?<\/summary>\n<p>No. It is naturally crystalline leonardite: sections of the seam with a dense, glassy structure that fracture into angular pieces. We select and screen it rather than synthesising anything. That is also why the analysis is high \u2014 we are sizing a rich fraction, not concentrating a poor one.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Why is the pH only 4.0\u20136.0?<\/summary>\n<p>That is the natural pH of high-humic leonardite crystal. It is not an adjustment and not a sign of contamination. It is generally an advantage on alkaline, calcareous or sodic ground. On an already acidic soil, our powder or granule grade at pH 5.0\u20137.0 is the safer choice, and we will say so if that is your situation.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Can I blend this with granular NPK?<\/summary>\n<p>Yes, and it works well where the size bands match \u2014 2\u20134 mm against standard granular NPK. Because the crystal is angular and dense rather than round and light, check for segregation on your own line before committing to a large run. We can send a sample for a blending trial.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Is this suitable for organic certification?<\/summary>\n<p>The material is unprocessed leonardite with no synthetic additives, which is permitted under most organic standards as a soil conditioner. Certification is granted to your finished product by your own certifier, so submit our TDS, MSDS and COA to them for review. We supply those documents with every enquiry and can provide additional declarations on request.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>How quickly does it break down in soil?<\/summary>\n<p>Gradually \u2014 that is the design. The granule softens with soil moisture and releases over weeks to months rather than days, which suits long-season and perennial crops. If you need an immediate, measurable response within days, a soluble potassium humate or fulvate is the right tool. If you are building soil across a season or more, this is.<\/p>\n<\/details>\n<\/div>\n<\/div>\n<div class=\"jf-sec\" id=\"related\">\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-rel, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-rel[data-kb-block=\"kb-adv-headingkb-h2-rel\"]{font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-rel mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-rel[data-kb-block=\"kb-adv-headingkb-h2-rel\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h2-rel img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h2-rel[data-kb-block=\"kb-adv-headingkb-h2-rel\"] img.kb-inline-image{width:150px;vertical-align:baseline;}<\/style>\n<h2>Also Available in This Family<\/h2>\n<div class=\"jf-rel-strip\"><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-powder-70\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/Insoluble-Humic-Acid-Powder-150x150.webp\" alt=\"Insoluble Humic Acid Powder 70% \u2013 Low-Ash Grade for Oilfield &amp;#038; Industrial Humates\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">Insoluble Humic Acid Powder 70% \u2013 Low-Ash Grade for Oilfield &amp;#038; Industrial Humates<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-powder-50\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/Insoluble-Humic-Acid-Powder-150x150.webp\" alt=\"Insoluble Humic Acid Powder 50% \u2013 Humate-Salt Feedstock &amp;#038; General Agriculture\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">Insoluble Humic Acid Powder 50% \u2013 Humate-Salt Feedstock &amp;#038; General Agriculture<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-powder-40\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/Insoluble-Humic-Acid-Powder-150x150.webp\" alt=\"Insoluble Humic Acid Powder 40% \u2013 Bulk Soil Amendment &amp;#038; Organic Fertilizer Base\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">Insoluble Humic Acid Powder 40% \u2013 Bulk Soil Amendment &amp;#038; Organic Fertilizer Base<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/microbial-humic-granular-fertilizer\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/Microbial-Humic-Granular-Fertilizer-1-150x150.webp\" alt=\"Microbial Humic Granular Fertilizer \u2013 Humic Granule + Bacillus Inoculant\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">Microbial Humic Granular Fertilizer \u2013 Humic Granule + Bacillus Inoculant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-prills\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/Low-Moisture-High-Hardness-Humic-acid-round-balls-prills-1-150x150.webp\" alt=\"Insoluble Humic Acid Prills \u2013 2\u20134 mm High-Hardness, 5% Max Moisture\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">Insoluble Humic Acid Prills \u2013 2\u20134 mm High-Hardness, 5% Max Moisture<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-granule\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/Insoluble-Humic-Acid-Granule-150x150.webp\" alt=\"Insoluble Humic Acid Granule \u2013 2\u20134 mm Disc-Granulated, 40% Humic Acid\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">Insoluble Humic Acid Granule \u2013 2\u20134 mm Disc-Granulated, 40% Humic Acid<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-powder-60\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/Insoluble-Humic-Acid-Powder-150x150.webp\" alt=\"Insoluble Humic Acid Powder 60% \u2013 Standard Grade from Leonardite\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">Insoluble Humic Acid Powder 60% \u2013 Standard Grade from Leonardite<\/span><\/a><\/div>\n<\/div>\n<div class=\"jf-cta\">\n<h3>Need a quotation or a sample?<\/h3>\n<p>Tell us your application, target market and packaging &mdash; we will come back with specification, price and lead time.<\/p>\n<p><a href=\"https:\/\/www.jingfenggroup.com\/contact\">Request a Quote<\/a>\n<\/div>\n<\/div>\n<p><script>\n(function(){\n  function init(){\n    var nav=document.querySelector('.jf-nav');\n    if(!nav){return;}\n    var links=[].slice.call(nav.querySelectorAll('a'));\n    function targetOf(a){\n      var h=a.getAttribute('href');\n      if(h){ if(h.charAt(0)==='#'){ return document.querySelector(h); } }\n      return null;\n    }\n    var secs=links.map(targetOf);\n    var ticking=false;\n    function onScroll(){\n      var navH=nav.offsetHeight;\n      var y=window.pageYOffset+navH+30;\n      var cur=0;\n      for(var i=0;i<secs.length;i++){\n        if(secs[i]){\n          if(secs[i].getBoundingClientRect().top+window.pageYOffset<=y){ cur=i; }\n        }\n      }\n      for(var j=0;j<links.length;j++){ links[j].classList.toggle('jf-active',j===cur); }\n      if(links[cur]){\n        if(nav.scrollWidth>nav.clientWidth){\n          var l=links[cur];\n          nav.scrollTo({left:l.offsetLeft-nav.clientWidth\/2+l.offsetWidth\/2,behavior:'smooth'});\n        }\n      }\n    }\n    links.forEach(function(a){\n      a.addEventListener('click',function(e){\n        var t=targetOf(a);\n        if(!t){return;}\n        e.preventDefault();\n        var navH=nav.offsetHeight;\n        var rect=t.getBoundingClientRect();\n        var top=rect.top+window.pageYOffset-navH-14;\n        if(top<0){top=0;}\n        window.scrollTo({top:top,behavior:'smooth'});\n        links.forEach(function(x){x.classList.remove('jf-active');});\n        a.classList.add('jf-active');\n      });\n    });\n    window.addEventListener('scroll',function(){\n      if(!ticking){ window.requestAnimationFrame(function(){ onScroll(); ticking=false; }); ticking=true; }\n    },{passive:true});\n    window.addEventListener('resize',onScroll);\n    onScroll();\n  }\n  if(document.readyState==='loading'){ document.addEventListener('DOMContentLoaded',init); } else { init(); }\n})();\n<\/script><\/p>\n<p><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"Product\", \"name\": \"Insoluble Humic Acid Crystal\", \"description\": \"Insoluble humic acid crystal in 2\u20134 mm irregular granule: 60% humic acid, CEC 300 meq\/100g. Dust-free direct soil application. Batch COA.\", \"brand\": {\"@type\": \"Brand\", \"name\": \"JINGFENG\"}, \"material\": \"Leonardite\", \"category\": \"Insoluble humic acid \/ leonardite raw material\", \"additionalProperty\": [{\"@type\": \"PropertyValue\", \"name\": \"Fulvic acid (dry basis)\", \"value\": \"\"}, {\"@type\": \"PropertyValue\", \"name\": \"Humic acid (dry basis)\", \"value\": \"60.0% min\"}, {\"@type\": \"PropertyValue\", \"name\": \"Potassium as K2O (dry basis)\", \"value\": \"\"}, {\"@type\": \"PropertyValue\", \"name\": \"Water solubility\", \"value\": \"\"}, {\"@type\": \"PropertyValue\", \"name\": \"pH\", \"value\": \"4.0 \u2013 6.0\"}, {\"@type\": \"PropertyValue\", \"name\": \"Form \/ particle size\", \"value\": \"Black crystal \/ irregular granule\"}], \"url\": \"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-crystal\/\", \"offers\": {\"@type\": \"AggregateOffer\", \"priceCurrency\": \"USD\", \"availability\": \"https:\/\/schema.org\/InStock\", \"url\": \"https:\/\/www.jingfenggroup.com\/insoluble-humic-acid\/insoluble-humic-acid-crystal\/\"}, \"sku\": \"JFHA-HA-C\"}<\/script><br \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does 'crystal' mean here \u2014 is it a purified product?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. It is naturally crystalline leonardite: sections of the seam with a dense, glassy structure that fracture into angular pieces. We select and screen it rather than synthesising anything. That is also why the analysis is high \u2014 we are sizing a rich fraction, not concentrating a poor one.\"}}, {\"@type\": \"Question\", \"name\": \"Why is the pH only 4.0\u20136.0?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"That is the natural pH of high-humic leonardite crystal. It is not an adjustment and not a sign of contamination. It is generally an advantage on alkaline, calcareous or sodic ground. On an already acidic soil, our powder or granule grade at pH 5.0\u20137.0 is the safer choice, and we will say so if that is your situation.\"}}, {\"@type\": \"Question\", \"name\": \"Can I blend this with granular NPK?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, and it works well where the size bands match \u2014 2\u20134 mm against standard granular NPK. Because the crystal is angular and dense rather than round and light, check for segregation on your own line before committing to a large run. We can send a sample for a blending trial.\"}}, {\"@type\": \"Question\", \"name\": \"Is this suitable for organic certification?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The material is unprocessed leonardite with no synthetic additives, which is permitted under most organic standards as a soil conditioner. Certification is granted to your finished product by your own certifier, so submit our TDS, MSDS and COA to them for review. We supply those documents with every enquiry and can provide additional declarations on request.\"}}, {\"@type\": \"Question\", \"name\": \"How quickly does it break down in soil?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Gradually \u2014 that is the design. 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