... high-efficient soil conditioner. Seaweed Compound FertilizerThe seaweed compound fertilizer can improve soils fertility, and modulate soil nutrition ... so it is a kind of high efficacy compound fertilizer. Types as follows:2.1 NPK: 8-4 ... Ca, Mg, Zn, Fe, etc.2.3 NPK: 12-8-15 with seaweed: 10% + organic matter: 20% + Ca, Mg, ... 20 Kgs/Bag or required by customers NPK 15-15-15 Seaweed Compound Fertilizer