BuildASoil Fish Bone Meal is an excellent source of Phosphorous.
1/2 Cup Per cubic foot is recommended dosage or top dress a handful before flower..
Fish Bone Meal is the preferred source of phosphorus and also has calcium with a small amount of nitrogen.
Fish Bone Meal is preferred because it doesn’t come from animals treated with antibiotics, hormones etc.
Use as a top dress in transition or as a component of your mix.