agriculture grade, refined from natural seaweed, seaweed extract Seaweed organic fertilizer (granular)Seaweed organic fertilizer ... fatty acid, phycophaein, fucoidin, and also it contains some natural growth regulating substances, such as cytokinin, gibberellin, mannitol, betaine ... zinc, nickel, magnesium and some beneficial bacterium and natural antibiotics.This kind of seaweed fertilizer is good for ...