... Extract Flake, 100% water soluble, organic fertilizer 1.Black powder 2.Water soluble 3. Alginic Acid=8- ... 15% Natural Seaweed Extract Powder, 100% water soluble, organic fertilizer China patent no.: 03112663.6 Product ... 8-15%, organic matter≥50%, N≥0.5%, P2O5≥3.0%, K2O:18-22%, much secondary element ... Amino acids1.25%Betaine40ppmNitrogen(N)0.62%Phosphorus(P2O5)4.62%Potassium(K2O)19.67%Sulphur( ...