CalPhos® Soft Rock Phosphate — 20 lb. Standard Powder

CalPhos Standard Powder is the original CalPhos grade produced since the 1940s. Finely ground to the consistency of fine lime with 80% passing through a 200 mesh screen, it is a natural untreated soft rock phosphate with colloidal clay from Canton Mills. OMRI listed for organic production. Sold in a 20 lb. heavy-duty plastic bag inside an 8"x8"x8" cardboard box.

Key Specifications

• Analysis: 0-3-0
• Available P2O5: 3%
• Total P2O5: 20%
• Calcium (Ca): 20%
• Form: Finely ground powder, 80% through 200 mesh
• Package: 20 lb. bag in 8"x8"x8" cardboard box
• Certification: OMRI listed for organic use
• Not acid forming — will not cake or harden

Granular vs. Powder

The standard powder is the original CalPhos grade — finely milled for fast incorporation into compost, soil blends, and fine applications. Choose powder for compost blending and fine incorporation; choose granular for broadcast spreading with less dust.

Applications

• Soil Amendment — Slow-release phosphorus and calcium for large-scale applications
• Organic Programs — OMRI listed, compatible with all organic production systems
• Compost — Add to compost piles to retain nitrogen and boost phosphorus
• Transplanting — Apply at planting for root establishment support

Available Sizes

• 1 lb. | 4 lb. | 20 lb. | 50 lb.