Rock Phosphate is a natural, untreated soft phosphate with colloidal clay containing valuable minor minerals in addition to phosphorus. It is not acid forming, will not cake or harden and spreads easily through any type of lime, phosphate or fertilizer spreader.

Rock Phosphate is not a complete fertilizer and should never be used as such. It is an excellent source of phosphate that is being used profitably for farmers who are interested in getting a dollar’s value for a dollar spent. When applied to the soil Rock Phosphate adheres to and becomes a part of the soil. It will not leach and it will not revert and once applied remains in the soil until used by the plants. Rock Phosphate contains no harmful acids and encourages growth of soil bacteria and earthworms.

CalPhos Rock Phosphate 0-3-0/0-7-0

• Soil amendment for long-term supply of phosphate

• Derived from Soft Rock Phosphate
• OMRI Listed