Seaweed Extract 18% Fertilizer

Alginic acid18%
K₂O18%
Solubility100%
FormBlack flake or powder

Product overview

A brown-seaweed extract (kelp and other brown algae) with 18% alginic acid, dried to flakes or powder. It dissolves completely and is used in foliar sprays, fertigation and as a biostimulant component of organic and compound fertilizers.

Specification

ItemSpecification
AppearanceBlack Flakes / Powder
Solubility in water100% w/w
pH8–11
Organic matter≥45%
Alginic acid≥18%
Seaweed polysaccharides≥30%
Amino acids≥1.5%
Nitrogen (N)≥0.5%
Phosphorus (P₂O₅)≥2%
Potassium (K₂O)≥18%
Moisture (H₂O)≤5%

Values are the supply specification. Confirm the grade against the COA of the lot you test.

What it does

  • Seaweed polysaccharides and alginic acid
  • Potassium and trace elements from the seaweed
  • Biostimulant component for foliar and fertigation use
  • Combines with humic and fulvic carbon in liquid blends

How it is used

Dissolve for foliar sprays, drip irrigation or root drench, or use as a raw material in biological, organic and compound fertilizers. Higher-alginate grades allow lower dose rates.

Packing and documents

25 kg woven or kraft bags with an inner liner; jumbo bags and private-label packing on request. TDS and SDS for every grade, a representative COA before you order and a COA with every lot. Request documents or a sample.

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FAQ

Which concentration should I choose?

Higher alginic acid grades (18–20%) suit concentrated liquid products; 12–16% grades are cost-effective for direct application.