A very available form of phosphorus, Phos Cal 10 is made from soft rock phosphate ore.  The ore is pulverized to minus 400.  We have added 2 strains of soil biota specifically to resoluabize phosphorus and calcium.  Ideal for use during pre planting or during the growing season when addtional phosphorus is required.  Can be diluted for fertigation drip tape or foliar application.

(Concentrate) Sold by the gallon.