{"id":1193,"date":"2026-09-14T13:08:27","date_gmt":"2026-09-14T05:08:27","guid":{"rendered":"https:\/\/www.jingfenggroup.com\/seaweed-extract-black-liquid\/"},"modified":"2026-09-16T19:21:43","modified_gmt":"2026-09-16T11:21:43","slug":"seaweed-extract-black-liquid","status":"publish","type":"product_item","link":"https:\/\/www.jingfenggroup.com\/zh\/seaweed-extract\/seaweed-extract-black-liquid\/","title":{"rendered":"Seaweed Extract Black Liquid \u2013 High-Content Liquid Biostimulant"},"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\">Seaweed Extract<\/div>\n<style>.wp-block-kadence-advancedheading.kt-adv-headingkb-h1-black-liquid, .wp-block-kadence-advancedheading.kt-adv-headingkb-h1-black-liquid[data-kb-block=\"kb-adv-headingkb-h1-black-liquid\"]{font-size:33px;font-style:normal;color:#ffffff;}.wp-block-kadence-advancedheading.kt-adv-headingkb-h1-black-liquid mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-headingkb-h1-black-liquid[data-kb-block=\"kb-adv-headingkb-h1-black-liquid\"] 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-black-liquid img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-headingkb-h1-black-liquid[data-kb-block=\"kb-adv-headingkb-h1-black-liquid\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-headingkb-h1-black-liquid, .wp-block-kadence-advancedheading.kt-adv-headingkb-h1-black-liquid[data-kb-block=\"kb-adv-headingkb-h1-black-liquid\"]{font-size:26px;}}<\/style>\n<h1 class=\"kt-adv-heading kb-h1-black-liquid jf-hero-title\">Seaweed Extract Black Liquid<\/h1>\n<p class=\"jf-hero-tag\">The Instant Liquid Powerhouse \u2014 Alginic + Fulvic in One<\/p>\n<div class=\"jf-badges\">\n<span class=\"jf-badge\">Alginic acid \u2265 40 g\/L<\/span><br \/>\n<span class=\"jf-badge\">Organic matter \u2265 100 g\/L<\/span><br \/>\n<span class=\"jf-badge\">Fulvic acid \u2265 20 g\/L<\/span><br \/>\n<span class=\"jf-badge\">Potassium as K\u2082O <\/span>\n<\/div>\n<p class=\"jf-hero-lead\"><strong>Every lot ships with a Certificate of Analysis stating the tested values against the stated Chinese industry standards.<\/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>Seaweed extract<\/strong> is a water-soluble organic biostimulant produced from marine brown algae. JINGFENG&#8217;s <a href='https:\/\/en.wikipedia.org\/wiki\/Ascophyllum_nodosum' target='_blank' rel='noopener'>Ascophyllum nodosum<\/a> extract is obtained by physical crushing followed by enzymatic or biochemical hydrolysis, so the algae&#8217;s own <a href='https:\/\/en.wikipedia.org\/wiki\/Alginic_acid' target='_blank' rel='noopener'>alginic acid<\/a>, seaweed polysaccharides, mannitol, betaine, amino acids and natural plant growth regulators (auxins, cytokinins and gibberellins) are preserved intact. The enzymatic range below is fermented and colour-graded (green, brown and black) for different formulation and label needs, and includes NPK-free grades for organic-only blends.<\/p>\n<p><strong>Seaweed Extract Black Liquid<\/strong> is JINGFENG&#8217;s high-content liquid biostimulant: a fermented <a href='https:\/\/en.wikipedia.org\/wiki\/Ascophyllum_nodosum' target='_blank' rel='noopener'>Ascophyllum nodosum<\/a> extract with mineral-source organic carbon and fulvic acid built in. It delivers \u2265 40 g\/L alginic acid, \u2265 100 g\/L organic matter, \u2265 20 g\/L fulvic acid and potassium as K\u2082O \u2265 40 g\/L, and dissolves instantly for foliar, drip and flood irrigation. The deep black colour comes from the high load of organic matter, alginic and fulvic acid \u2014 a sign of high concentration.<\/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>Ultra-high concentration<\/h4>\n<p>\u2265 40 g\/L alginic acid, \u2265 100 g\/L organic matter and \u2265 20 g\/L fulvic acid per litre.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>Instant solubility<\/h4>\n<p>Dissolves instantly with no residue \u2014 no pre-dissolving step before the spray tank.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>Mineral-source organic carbon<\/h4>\n<p>Built-in fulvic acid and organic carbon for fast soil microbial activation.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>Complete liquid package<\/h4>\n<p>Seaweed extract + fulvic acid + K in one homogeneous liquid; balanced microelements and natural hormones.<\/p>\n<\/div>\n<div class=\"jf-card\">\n<h4>COA on every batch<\/h4>\n<p>Each lot ships with a Certificate of Analysis stating the tested values against Chinese industry standards.<\/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>Appearance<\/td>\n<td>Black liquid<\/td>\n<td>Visual inspection<\/td>\n<\/tr>\n<tr>\n<td>pH<\/td>\n<td>8 \u2013 11<\/td>\n<td>NY\/T 1973-2021<\/td>\n<\/tr>\n<tr>\n<td>Organic matter<\/td>\n<td>\u2265 100 g\/L<\/td>\n<td>NY\/T 1976-2010<\/td>\n<\/tr>\n<tr>\n<td>Alginic acid<\/td>\n<td>\u2265 40 g\/L<\/td>\n<td>NY\/T 3174-2017<\/td>\n<\/tr>\n<tr>\n<td>Fulvic acid<\/td>\n<td>\u2265 20 g\/L<\/td>\n<td>NY\/T 1978-2022<\/td>\n<\/tr>\n<tr>\n<td>Mannitol<\/td>\n<td>\u2265 6 g\/L<\/td>\n<td>HPLC<\/td>\n<\/tr>\n<tr>\n<td>Amino acids<\/td>\n<td>\u2265 6 g\/L<\/td>\n<td>NY 1429-2007<\/td>\n<\/tr>\n<tr>\n<td>Nitrogen (N)<\/td>\n<td>\u2265 1 g\/L<\/td>\n<td>NY\/T 1977-2010<\/td>\n<\/tr>\n<tr>\n<td>Phosphorus (P\u2082O\u2085)<\/td>\n<td>\u2265 4 g\/L<\/td>\n<td>NY\/T 1977-2010<\/td>\n<\/tr>\n<tr>\n<td>Potassium (K\u2082O)<\/td>\n<td>\u2265 40 g\/L<\/td>\n<td>NY\/T 1977-2010<\/td>\n<\/tr>\n<tr>\n<td>Sulphur (S)<\/td>\n<td>\u2264 3 g\/L<\/td>\n<td>NY\/T 1117-2010<\/td>\n<\/tr>\n<tr>\n<td>Magnesium (Mg)<\/td>\n<td>\u2264 8 g\/L<\/td>\n<td>NY\/T 1117-2010<\/td>\n<\/tr>\n<tr>\n<td>Sodium (Na)<\/td>\n<td>\u2264 4 g\/L<\/td>\n<td>NY\/T 1972-2010<\/td>\n<\/tr>\n<tr>\n<td>Boron (B)<\/td>\n<td>75 \u2013 150 ppm<\/td>\n<td>ICP-OES \/ ICP-MS<\/td>\n<\/tr>\n<tr>\n<td>Indoleacetic acid (IAA)<\/td>\n<td>30 \u2013 100 ppm<\/td>\n<td>HPLC<\/td>\n<\/tr>\n<tr>\n<td>Iron (Fe)<\/td>\n<td>75 \u2013 250 ppm<\/td>\n<td>ICP-OES \/ ICP-MS<\/td>\n<\/tr>\n<tr>\n<td>Iodine (I)<\/td>\n<td>\u2264 600 ppm<\/td>\n<td>ICP-MS<\/td>\n<\/tr>\n<tr>\n<td>Manganese (Mn)<\/td>\n<td>8 \u2013 15 ppm<\/td>\n<td>ICP-OES \/ ICP-MS<\/td>\n<\/tr>\n<tr>\n<td>Gibberellin<\/td>\n<td>\u2264 100 ppm<\/td>\n<td>HPLC \/ ELISA<\/td>\n<\/tr>\n<tr>\n<td>Zinc (Zn)<\/td>\n<td>\u2264 50 ppm<\/td>\n<td>ICP-OES \/ ICP-MS<\/td>\n<\/tr>\n<tr>\n<td>Copper (Cu)<\/td>\n<td>\u2264 10 ppm<\/td>\n<td>ICP-OES \/ ICP-MS<\/td>\n<\/tr>\n<tr>\n<td>Lead (Pb)<\/td>\n<td>\u2264 50 ppm<\/td>\n<td>NY\/T 1978-2022<\/td>\n<\/tr>\n<tr>\n<td>Chromium (Cr)<\/td>\n<td>\u2264 50 ppm<\/td>\n<td>NY\/T 1978-2022<\/td>\n<\/tr>\n<tr>\n<td>Cadmium (Cd)<\/td>\n<td>\u2264 10 ppm<\/td>\n<td>NY\/T 1978-2022<\/td>\n<\/tr>\n<tr>\n<td>Mercury (Hg)<\/td>\n<td>\u2264 5 ppm<\/td>\n<td>NY\/T 1978-2022<\/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, homogeneous liquid. Unlike powders it dissolves instantly in water, saving time and labour and ensuring uniform application with no residue.<\/p>\n<p><strong>In water:<\/strong> instantly soluble. Mixes evenly into foliar and fertigation programmes.<\/p>\n<p><strong>Handling:<\/strong> keep closed when not in use; shake well before use. Avoid strong-acid tank mixes; use the diluted solution within 24 hours.<\/p>\n<div class=\"jf-note\">Ready-to-use liquid enzymatic seaweed extract from Ascophyllum nodosum \u2014 dissolves instantly, rich in alginic acid, seaweed oligosaccharides, mannitol, betaine and natural plant growth regulators.<\/div>\n<h3>How the enzymatic seaweed extracts compare<\/h3>\n<table class=\"jf-tb jf-tb-cmp\">\n<thead>\n<tr>\n<th>Grade<\/th>\n<th>Form<\/th>\n<th>Seaweed active<\/th>\n<th>Organic matter<\/th>\n<th>NPK<\/th>\n<th>Best for<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/no-npk-green-seaweed-extract-powder\/\" target=\"_blank\" rel=\"noopener\">No NPK Green Seaweed Extract Powder<\/a><\/td>\n<td>Powder<\/td>\n<td>\u2265 60% alginic + poly<\/td>\n<td>\u2265 60%<\/td>\n<td>No NPK<\/td>\n<td>Organic-only blends, soil<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/no-npk-brown-seaweed-extract-powder\/\" target=\"_blank\" rel=\"noopener\">No NPK Brown Seaweed Extract Powder<\/a><\/td>\n<td>Powder<\/td>\n<td>\u2265 30% alginate + oligo<\/td>\n<td>\u2265 40%<\/td>\n<td>No NPK<\/td>\n<td>Micronutrient-rich organic blends<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/enzymatic-brown-seaweed-extract-liquid\/\" target=\"_blank\" rel=\"noopener\">Enzymatic Brown Seaweed Extract Liquid<\/a><\/td>\n<td>Liquid<\/td>\n<td>\u2265 15% seaweed oligo<\/td>\n<td>\u2265 8%<\/td>\n<td>N + P + K<\/td>\n<td>Foliar and fertigation<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/enzymatic-brown-seaweed-extract-powder\/\" target=\"_blank\" rel=\"noopener\">Enzymatic Brown Seaweed Extract Powder<\/a><\/td>\n<td>Powder<\/td>\n<td>\u2265 30% alginate<\/td>\n<td>\u2265 60%<\/td>\n<td>N + P + K (K\u2082O \u2265 16%)<\/td>\n<td>Compound fertilizer blending<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/enzymatic-green-seaweed-extract-liquid\/\" target=\"_blank\" rel=\"noopener\">Enzymatic Green Seaweed Extract Liquid<\/a><\/td>\n<td>Liquid<\/td>\n<td>\u2265 40% seaweed oligo<\/td>\n<td>\u2265 15%<\/td>\n<td>N + P + K<\/td>\n<td>High-load foliar<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/enzymatic-green-seaweed-extract-powder\/\" target=\"_blank\" rel=\"noopener\">Enzymatic Green Seaweed Extract Powder<\/a><\/td>\n<td>Powder<\/td>\n<td>\u2265 40% alginate<\/td>\n<td>\u2265 60%<\/td>\n<td>N + P + K (K\u2082O \u2265 18%)<\/td>\n<td>Premium organic blends<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/seaweed-extract-black-liquid\/\" target=\"_blank\" rel=\"noopener\">Seaweed Extract Black Liquid <em>(this product)<\/em><\/a><\/td>\n<td>Liquid<\/td>\n<td>\u2265 40 g\/L alginic<\/td>\n<td>\u2265 100 g\/L<\/td>\n<td>N + P + K (K\u2082O \u2265 40 g\/L)<\/td>\n<td>Instant soil and plant rejuvenation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"jf-sub\">The enzymatic range spans NPK-free powders, NPK-bearing powders and ready-to-use liquids. Liquids are dosed per litre (g\/L); powders are dosed per kilogram (w\/w). Pick the form that fits your blending and application route.<\/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\">For foliar spray, drip \/ flood irrigation and seed soaking as a high-content liquid biostimulant.<\/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>Foliar spray<\/td>\n<td>Dilute 500 \u2013 800 times with clean water; spray at seedling, tillering, flowering and fruiting stages.<\/td>\n<td>Dilute 500 \u2013 800\u00d7<\/td>\n<\/tr>\n<tr>\n<td>Drip \/ flood irrigation<\/td>\n<td>Dilute 800 \u2013 1000 times; 1.5 \u2013 3 L per acre per application.<\/td>\n<td>Dilute 800 \u2013 1000\u00d7<\/td>\n<\/tr>\n<tr>\n<td>Seed soaking<\/td>\n<td>Dilute 1000 \u2013 1200 times; soak 6 \u2013 12 hours before sowing.<\/td>\n<td>Dilute 1000 \u2013 1200\u00d7<\/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>1 L \/ 5 L<\/td>\n<td>HDPE bottle<\/td>\n<\/tr>\n<tr>\n<td>10 L \/ 20 L \/ 25 L<\/td>\n<td>HDPE drum<\/td>\n<\/tr>\n<tr>\n<td>200 L \/ 1000 L<\/td>\n<td>IBC tote<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Storage:<\/strong> Store in a cool, dry, well-ventilated place, away from direct sunlight and high temperature. Keep away from children and livestock; use within 3 months of opening. Shake well before use.<\/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=\"\/contact\/\"><span class=\"jf-case-tag\">Field reference<\/span><\/p>\n<h4>Rice cultivation, Jiangsu<\/h4>\n<p>Soaked at 1000\u00d7 and foliar at 600\u00d7; germination +15%, yield +12% versus the previous year.<\/p>\n<p><span class=\"jf-case-more\">Explore applications &#8594;<\/span><\/a><br \/>\n<a class=\"jf-case\" href=\"\/contact\/\"><span class=\"jf-case-tag\">Field reference<\/span><\/p>\n<h4>Tomato greenhouse, Shandong<\/h4>\n<p>Drip at 900\u00d7 and foliar at 500\u00d7; fruit setting +20%, blossom-end rot \u221280%.<\/p>\n<p><span class=\"jf-case-more\">Explore applications &#8594;<\/span><\/a><br \/>\n<a class=\"jf-case\" href=\"\/contact\/\"><span class=\"jf-case-tag\">Field reference<\/span><\/p>\n<h4>Apple orchard, Shaanxi<\/h4>\n<p>Flood at 1000\u00d7 and foliar at 700\u00d7; soil organic matter +0.8%, premium fruit rate +25%.<\/p>\n<p><span class=\"jf-case-more\">Explore 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>Why is the product black?<\/summary>\n<p>The black colour comes from the high content of organic matter, alginic acid and fulvic acid extracted from natural seaweed. These are the core nutrients, and the deep colour indicates high concentration and strong activity.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>How do I dilute it?<\/summary>\n<p>For foliar spray dilute 500 \u2013 800 times, for drip \/ flood irrigation 800 \u2013 1000 times, for seed soaking 1000 \u2013 1200 times. Always add the product to water, not water to the product, and use the diluted solution within 24 hours.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Is it safe for crops and the environment?<\/summary>\n<p>Yes \u2014 it is made from natural seaweed through eco-friendly extraction, free of harmful chemicals. Heavy metals are tightly controlled (Hg \u2264 5 ppm, Cd \u2264 10 ppm) to meet international agricultural safety standards, and it suits organic cultivation.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Can it be mixed with pesticides?<\/summary>\n<p>It can be mixed with most neutral and alkaline pesticides and fertilizers. Avoid strong acids; a small-scale compatibility test is advised before large-scale application.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>Do you provide a COA per batch?<\/summary>\n<p>Yes. Every shipment travels with a Certificate of Analysis stating the tested alginic acid, organic matter, fulvic acid and K\u2082O.<\/p>\n<\/details>\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\">\n<summary>What is the minimum order and lead time?<\/summary>\n<p>Standard stock item. MOQ one pallet of drums \/ IBC; 7 \u2013 15 days ex-works. Private-label printing available on request.<\/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 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src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-no-npk-green-seaweed-extract-powder-1-150x150.webp\" alt=\"No NPK Green Seaweed Extract Powder \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">No NPK Green Seaweed Extract Powder \u2013 Enzymatic Biostimulant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/20-seaweed-extract-big-flakes\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-20pct-seaweed-extract-big-flakes-1-150x150.webp\" alt=\"20% Seaweed Extract Big Flakes \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">20% Seaweed Extract Big Flakes \u2013 High-Load Biostimulant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/18-seaweed-extract-micro-granule\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-18pct-seaweed-extract-micro-granule-1-150x150.webp\" alt=\"18% Seaweed Extract Micro Granule \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">18% Seaweed Extract Micro Granule \u2013 High-Alginic Biostimulant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/18-seaweed-extract-big-flakes\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-18pct-seaweed-extract-big-flakes-1-150x150.webp\" alt=\"18% Seaweed Extract Big Flakes \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">18% Seaweed Extract Big Flakes \u2013 High-Alginic Soil Conditioner<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/16-seaweed-extract-big-flakes\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-16pct-seaweed-extract-big-flakes-1-150x150.webp\" alt=\"16% Seaweed Extract Big Flakes \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">16% Seaweed Extract Big Flakes \u2013 Water-Soluble Biostimulant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/25-seaweed-extract-micro-granule\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-25pct-seaweed-extract-micro-granule-1-150x150.webp\" alt=\"25% Seaweed Extract Micro Granule \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">25% Seaweed Extract Micro Granule \u2013 Maximum-Alginic Grade<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/25-seaweed-extract-big-flakes\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-25pct-seaweed-extract-big-flakes-1-150x150.webp\" alt=\"25% Seaweed Extract Big Flakes \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">25% Seaweed Extract Big Flakes \u2013 Maximum-Alginic Grade<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/20-seaweed-extract-micro-granule\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-20pct-seaweed-extract-micro-granule-1-150x150.webp\" alt=\"20% Seaweed Extract Micro Granule \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">20% Seaweed Extract Micro Granule \u2013 High-Load Biostimulant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/14-16-seaweed-extract-small-flakes\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-14-16pct-seaweed-extract-small-flakes-1-150x150.webp\" alt=\"14-16% Seaweed Extract Small Flakes \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">14-16% Seaweed Extract Small Flakes \u2013 Water-Soluble Biostimulant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/14-16-seaweed-extract-micro-granule\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-14-16pct-seaweed-extract-micro-granule-1-150x150.webp\" alt=\"14-16% Seaweed Extract Micro Granule \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">14-16% Seaweed Extract Micro Granule \u2013 Water-Soluble Biostimulant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/12-seaweed-extract-small-flakes\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-12pct-seaweed-extract-small-flakes-1-150x150.webp\" alt=\"12% Seaweed Extract Small Flakes \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">12% Seaweed Extract Small Flakes \u2013 Water-Soluble Biostimulant<\/span><\/a><a class=\"jf-rel-thumb\" target=\"_blank\" rel=\"noopener\" href=\"https:\/\/www.jingfenggroup.com\/seaweed-extract\/12-seaweed-extract-powder\/\"><span class=\"jf-rel-img\"><img src=\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-12pct-seaweed-extract-powder-1-150x150.webp\" alt=\"12% Seaweed Extract Powder \u2014 product form\" loading=\"lazy\" decoding=\"async\"><\/span><span class=\"t\">12% Seaweed Extract Powder \u2013 Organic Biostimulant Raw Material<\/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 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High-content.\", \"brand\": {\"@type\": \"Brand\", \"name\": \"JINGFENG\"}, \"material\": \"Ascophyllum nodosum\", \"category\": \"Seaweed extract biostimulant and fertilizer raw material\", \"additionalProperty\": [{\"@type\": \"PropertyValue\", \"name\": \"Alginic acid\", \"value\": \"\u2265 40 g\/L\"}, {\"@type\": \"PropertyValue\", \"name\": \"Organic matter\", \"value\": \"\u2265 100 g\/L\"}, {\"@type\": \"PropertyValue\", \"name\": \"Fulvic acid\", \"value\": \"\u2265 20 g\/L\"}, {\"@type\": \"PropertyValue\", \"name\": \"pH\", \"value\": \"8 \u2013 11\"}, {\"@type\": \"PropertyValue\", \"name\": \"Form \/ particle size\", \"value\": \"Black liquid\"}], \"url\": \"https:\/\/www.jingfenggroup.com\/seaweed-extract\/seaweed-extract-black-liquid\/\", \"offers\": {\"@type\": \"AggregateOffer\", \"priceCurrency\": \"USD\", \"availability\": \"https:\/\/schema.org\/InStock\", \"url\": \"https:\/\/www.jingfenggroup.com\/seaweed-extract\/seaweed-extract-black-liquid\/\"}, \"image\": [\"https:\/\/www.jingfenggroup.com\/wp-content\/uploads\/2026\/09\/jingfeng-seaweed-extract-black-liquid-1.webp\"]}<\/script><br \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Why is the product black?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The black colour comes from the high content of organic matter, alginic acid and fulvic acid extracted from natural seaweed. These are the core nutrients, and the deep colour indicates high concentration and strong activity.\"}}, {\"@type\": \"Question\", \"name\": \"How do I dilute it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For foliar spray dilute 500 \u2013 800 times, for drip \/ flood irrigation 800 \u2013 1000 times, for seed soaking 1000 \u2013 1200 times. Always add the product to water, not water to the product, and use the diluted solution within 24 hours.\"}}, {\"@type\": \"Question\", \"name\": \"Is it safe for crops and the environment?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes \u2014 it is made from natural seaweed through eco-friendly extraction, free of harmful chemicals. Heavy metals are tightly controlled (Hg \u2264 5 ppm, Cd \u2264 10 ppm) to meet international agricultural safety standards, and it suits organic cultivation.\"}}, {\"@type\": \"Question\", \"name\": \"Can it be mixed with pesticides?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"It can be mixed with most neutral and alkaline pesticides and fertilizers. Avoid strong acids; a small-scale compatibility test is advised before large-scale application.\"}}, {\"@type\": \"Question\", \"name\": \"Do you provide a COA per batch?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Every shipment travels with a Certificate of Analysis stating the tested alginic acid, organic matter, fulvic acid and K\u2082O.\"}}, {\"@type\": \"Question\", \"name\": \"What is the minimum order and lead time?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Standard stock item. MOQ one pallet of drums \/ IBC; 7 \u2013 15 days ex-works. Private-label printing available on request.\"}}]}<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Seaweed extract black liquid \u2014 instant soluble, \u2265 40 g\/L alginic acid, \u2265 100 g\/L organic matter, \u2265 20 g\/L fulvic acid, K\u2082O \u2265 40 g\/L. High-content.<\/p>\n","protected":false},"featured_media":1185,"menu_order":640,"template":"","tags":[],"product_class":[194],"class_list":["post-1193","product_item","type-product_item","status-publish","has-post-thumbnail","hentry","product_class-seaweed-extract"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Seaweed Extract Black Liquid | High Alginic + Fulvic Acid | JINGFENG<\/title>\n<meta name=\"description\" content=\"Seaweed extract black liquid \u2014 instant soluble, \u2265 40 g\/L alginic acid, \u2265 100 g\/L organic matter, \u2265 20 g\/L fulvic acid, K\u2082O \u2265 40 g\/L. 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