... natural mineral. A high-efficient soil conditioner. Seaweed Compound FertilizerThe seaweed compound fertilizer can improve soils fertility, and modulate soil nutrition ... fertilizer. Types as follows:2.1 NPK: 8-4-8 with seaweed: 10% + organic matter: 20% + Ca, Mg, Zn, Fe, ... Ca, Mg, Zn, Fe, etc.Validity: Two yearsPacking: 20 Kgs/Bag or required by customers NPK 15-15-15 Seaweed Compound Fertilizer