12% Seaweed Extract Powder
The Volume Grade — 12% Alginic Acid, 100% Soluble
Organic matter ≥ 50%
Water solubility 100%
Potassium as K₂O 10 – 12%
Every lot ships with a Certificate of Analysis stating tested alginic acid, organic matter, K₂O and pH.
Product Overview
Seaweed extract is a water-soluble organic biostimulant produced from marine brown algae. JINGFENG’s Ascophyllum nodosum extract is obtained by physical crushing followed by enzymatic or biochemical hydrolysis, so the algae’s own alginic acid, seaweed polysaccharides, mannitol, betaine, amino acids and natural plant growth regulators (auxins, cytokinins and gibberellins) are preserved intact. It is used as a root and foliar biostimulant, a soil conditioner and a raw material for organic fertilizer blends.
12% Seaweed Extract Powder is the lower-alginic, volume grade of the range of our seaweed extract range. A 12% alginic acid load with ≥ 50% organic matter — more product per tonne, which suits bulk blending and broad-acre soil programmes where cost per hectare leads.
It is supplied as a fine, free-flowing powder and is 100% water soluble. The material is produced from Ascophyllum nodosum by physical crushing and hydrolysis, so the seaweed’s own alginic acid, polysaccharides, mannitol, betaine, amino acids and growth regulators reach the field intact. Use it in drip and flushing programmes, in foliar tanks, spread on the soil, or as a raw material in organic fertilizer blends.
Key Benefits
≥ 12% alginic acid
A guaranteed alginic acid floor of ≥ 12% — the seaweed fraction buyers check first when comparing grades.
Dissolves completely
100% water soluble with no residue — pre-dissolve for a drip line or add straight to the spray tank.
Blends evenly
A fine powder that mixes uniformly into NPK, organic and microbial blends, even at low inclusion rates.
Natural growth regulators
Carries the seaweed’s own auxins, cytokinins and gibberellins, plus mannitol and betaine for stress tolerance.
Feeds soil biology
Seaweed polysaccharides and amino acids are readily available carbon for the soil microbiome.
COA on every batch
Each lot ships with a Certificate of Analysis stating tested alginic acid, organic matter, seaweed polysaccharides, K₂O and pH against the stated Chinese industry standards.
Technical Specification
| Parameter | Specification | Test standard |
|---|---|---|
| Appearance | Black powder | Visual inspection |
| Water solubility | 100% | NY/T 1973-2021 |
| pH | 8 – 11 | NY/T 1973-2021 |
| Organic matter | ≥ 50% | NY/T 1976-2010 |
| Alginic acid | ≥ 12% | NY/T 3174-2017 |
| Total seaweed polysaccharides | ≥ 25% | GB/T 5009 |
| Potassium (K₂O) | 10 – 12% | NY/T 1977-2010 |
| Moisture | ≤ 5% | GB/T 8576-2010 |
| Lead (Pb) | ≤ 50 ppm | NY/T 1978-2022 |
| Cadmium (Cd) | ≤ 10 ppm | NY/T 1978-2022 |
| Mercury (Hg) | ≤ 5 ppm | NY/T 1978-2022 |
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.
Need the full Certificate of Analysis, MSDS, or TDS for your formulation or tender file?
Form & Solubility
Form: black, free-flowing powder. Low dust for a seaweed powder; wets out readily and mixes evenly into dry blends.
In water: 100% water soluble. It disperses within seconds under light agitation and leaves no residue, so it can go straight into the spray tank or the fertilizer stock.
Handling: standard dust protection when handling bulk. Reseal opened bags to keep moisture out.
How the seaweed extract grades compare
| Grade | Form | Alginic acid | Organic matter | K₂O | Best for |
|---|---|---|---|---|---|
| 12% Seaweed Extract Powder (this product) | Powder | ≥ 12% | ≥ 50% | 10 – 12% | Bulk blending, broad-acre soil programmes |
| 12% Seaweed Extract Flakes | Small flake | ≥ 12% | ≥ 50% | 10 – 12% | Flushing, drip and foliar at volume |
| 14-16% Seaweed Extract Micro Granule | Micro granule | ≥ 14% | ≥ 45% | ≥ 14% | Mechanical spreading and dry blends |
| 14-16% Seaweed Extract Flakes | Small flake | ≥ 14% | ≥ 45% | ≥ 14% | General drip, foliar and flushing |
| 16% Seaweed Extract Big Flakes | Big flake | ≥ 16% | ≥ 45% | ≥ 14% | Broadcast spreading on open field |
| 18% Seaweed Extract Big Flakes | Big flake | ≥ 18% | ≥ 50% | ≥ 18% | Soil remediation and high-value crops |
| 18% Seaweed Extract Micro Granule | Micro granule | ≥ 18% | ≥ 50% | ≥ 18% | Blending into organic fertilizer lines |
| 20% Seaweed Extract Big Flakes | Big flake | ≥ 20% | ≥ 50% | ≥ 20% | High-load soil programmes |
| 20% Seaweed Extract Micro Granule | Micro granule | ≥ 20% | ≥ 50% | ≥ 20% | Compound and organic fertilizer blending |
| 25% Seaweed Extract Big Flakes | Big flake | ≥ 25% | ≥ 40% | ≥ 20% | Concentrated programmes, premium blends |
| 25% Seaweed Extract Micro Granule | Micro granule | ≥ 25% | ≥ 40% | ≥ 20% | High-load blending and fertigation |
All grades are 100% water soluble and carry the same seaweed-derived growth regulators. Higher alginic acid grades need a lighter dilution in the spray tank or irrigation line.
Applications & Dosage
For foliar, drip and flushing programmes, for spreading, and as a seaweed base in compound and organic fertilizer blends.
| Application | How to use | Rate |
|---|---|---|
| Foliar spray | Dilute 1:1000 – 1:1500 with clean water and spray in the cool part of the day. | 1:1000 – 1:1500 |
| Drip / water-flushing irrigation | Pre-dissolve and meter into the irrigation line or flushing water. | 1:1000 – 1:1500 |
| With compound fertilizer | Blend with NPK, organic or microbial compound fertilizer. | 1:100 |
| Tank-mix with pesticide | Add to pesticide or foliar fertilizer liquid to improve uptake. | 1:5000 |
Packaging & Storage
| Pack size | Description |
|---|---|
| 1 kg / 5 kg / 10 kg | Printed aluminium foil bag |
| 10 kg / 20 kg | Printed carton box |
| 20 / 25 kg | Woven or paper bag with inner liner; colour-printed PP/PE bag with inner liner |
| 1000 / 1100 kg | Jumbo bag with discharge spout |
Storage: Store in a cool, dry, well-ventilated place, away from direct sunlight and moisture. Stable for 2 years in the sealed original packaging; reseal opened bags.
Custom packaging, private-label printing and OEM specifications are available on request. Packaging photos are available in the product gallery.
Successful Cases
Vegetable programme, Shandong
Pre-dissolved before metering into the line; flows through filters without blocking the drippers.
Explore applications →
Field reference
Organic fertilizer blender, Henan
Used as a powder inclusion in an organic granular line and dispersed uniformly through the batch.
Explore applications →
Field reference
Citrus orchard, Spain
Sprayed in the cool part of the day; steady leaf colour and less heat stress noted across the block.
Explore applications →
Full case studies with crop data are published in our application sectors.
Frequently Asked Questions
Which seaweed extract grade should I choose?
Grades are sold on alginic acid content. This one is 12% alginic acid, the lower-alginic, volume grade of the range. A higher alginic grade lets you use less product per hectare, while a lower grade suits bulk blending where cost per tonne leads. Tell us your crop and route and we will recommend the grade.
How do I dilute it?
Dilute 1:1000 – 1:1500 with clean water for foliar spraying, drip or water-flushing irrigation. With compound fertilizer use 1:100; added to a pesticide or foliar fertilizer tank use 1:5000. Always add the product to water, not water to the product.
Is it 100% water soluble?
Yes — 100% water soluble with no residue. It dissolves under light agitation and leaves nothing to filter, so it is safe for drip lines, micro-sprinklers and spray tanks.
Is it suitable for organic farming?
It is a seaweed-derived organic input with no added synthetic plant hormones. Ask us for the input list and technical data sheet you need for your certification body.
Do you provide a COA per batch?
Yes. Every shipment travels with a Certificate of Analysis stating the tested alginic acid, organic matter, seaweed polysaccharides, K₂O and pH.
What is the minimum order and lead time?
Standard stock item. MOQ one pallet; 7–15 days ex-works. Private-label printing and custom blends are available on request.
Also Available in This Family
Seaweed Extract Black Liquid – High-Content Liquid Biostimulant
Enzymatic Green Seaweed Extract Powder – Alga GSP 50%
Enzymatic Green Seaweed Extract Liquid – Alga L 40% Biostimulant
Enzymatic Brown Seaweed Extract Powder – Bio-Alga BSP
Enzymatic Brown Seaweed Extract Liquid – Alga L 15% Biostimulant
No NPK Brown Seaweed Extract Powder – Enzymatic Biostimulant
No NPK Green Seaweed Extract Powder – Enzymatic Biostimulant
20% Seaweed Extract Big Flakes – High-Load Biostimulant
18% Seaweed Extract Micro Granule – High-Alginic Biostimulant
18% Seaweed Extract Big Flakes – High-Alginic Soil Conditioner
16% Seaweed Extract Big Flakes – Water-Soluble Biostimulant
25% Seaweed Extract Micro Granule – Maximum-Alginic Grade
25% Seaweed Extract Big Flakes – Maximum-Alginic Grade
20% Seaweed Extract Micro Granule – High-Load Biostimulant
14-16% Seaweed Extract Small Flakes – Water-Soluble Biostimulant
14-16% Seaweed Extract Micro Granule – Water-Soluble Biostimulant
12% Seaweed Extract Small Flakes – Water-Soluble BiostimulantNeed a quotation or a sample?
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