Rock Phosphate (50 lb)

Calphos™ is a natural, untreated Soft Rock Phosphate (0-3-0) with colloidal clay containing valuable trace minerals in addition to phosphorus. Since phosphorus is lacking in most soils, applications are a must for superior results. Contains a minimum of 3% available (and a minimum of 20% total) phosphoric acid (P2O5) and 20% Calcium (Ca).

Once applied, Calphos™ remains in the soil until used by the plants - will not leach. Ideal for fruiting and flowering plants, it stimulates strong root formation, hastens crop maturity and encourages earthworms and soil bacteria.

Broadcast 50 lbs. per 1,000 sq. ft. or side dress around existing plants. OMRI Listed for use in organic production.