Phosphate Rock 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.
Phosphate Rock is not a complete fertilizer and should never be used as such but it is an excellent source of phosphate that can be used profitably on certified organic farms. When applied to the soil Phosphate Rock adheres to and becomes a part of the soil. It will not leach and once applied, remains in the soil until used by the plants. Phosphate Rock contains no harmful acids and encourages growth of soil bacteria and earthworms.
Application Rates
Phosphate Rock when purchased in granular form is much easier to
apply. Apply Phosphate Rock any time per soil test recommendations.
An average application rate is usually around 300 to 500 lbs. per
acre. Density = 70 lbs/ft3
Granular Phosphate Rock
This grade has been finely ground and processed through the modern
granulating plant. Only natural materials are used to form the world's
only granular soft phosphate product. The granulizing process includes
the addition of water and bentonite.
OMRI LISTED™ - View OMRI Certificate
For more information, download the product label pdf.