Phosphorus

Black Phos 1-7-0

Highly available, but tied to a carbon source so it will feed the plant through the life of the crop.
Also contains Humic and Fulvic acid.

Power Phosphate 9-49-15

A highly available phosphate ideal for a starter fertilizer and perfect for the first thirty days of a crop.

Rock Phosphate 0-22-0

A unique mined source of natural phosphate, high in calcium that encourages plant growth due to its high energy. A shortage of phosphate can block uptake of nutrients into the plant. As a slow release form of phosphate, if applied at rates of 300 to 500 lbs per acre it is not necessary to apply each year. This product is certified for organic use.