Soft Rock Phosphate Fertilizer

CalPhos soft rock phosphate is a natural, untreated colloidal clay phosphate from Canton Mills — one of the most trusted sources of organic phosphorus and calcium available. At 0-3-0 analysis with 3% available P2O5 (20% total) and 20% calcium, it delivers slow-release nutrition without acidifying your soil.

  • OMRI listed for certified organic production
  • Not acid forming — will not cake or harden
  • Available in granular and standard powder forms
  • Sizes: 1 lb, 4 lb, 20 lb, and 50 lb

Serving Arkansas, Kansas, Missouri and Oklahoma. Shipping Nationwide! Wholesale to the public!