Rock Phosphate

Check pricing on Amazon.com

An organic, 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, fertilizer applications are a must for superior results. Calphos™ contains a minimum of 3% available (and a minimum of 20% total) phosphoric acid (P2O5) and 20% Calcium (Ca). OMRI Listed for use in organic production.

Once applied, rock phosphate 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.

Benefits:
• A non-leachable source of phosphorus and calcium
• Used by growers for over 50 years
• Promotes strong roots and accelerates crop maturity
• Earthworms and beneficial soil microbes love it!
• Contains 3% available — and a minimum of 20% total — phosphoric acid (P2O5)

Available size: 50 lb Bag

DIRECTIONS FOR USE:
Broadcast 50 lbs per 1,000 square feet or side dress around existing plants.

User’s Tip:
Calphos is fast-acting, similar to a superphosphate, and is relatively insoluble… so it will provide amazing results for a long time!

Affiliate Disclosure: As an Amazon Associate we earn from qualifying purchases. Some links may be affiliate links. We may get paid if you buy something or take an action after clicking one of these links.