Where do I purchase this? Is it available in bags like fertilizer? Do you know a supplier brand? Please reply. Thanks.
Use of Rock Phosphate
Certified GKH Gardening Expert
Yes, rock phosphate is available in bags from a variety of stores. Both organic and non-organically certified forms are available. We cannot recommend specific reatilers, but rock phosphate can be ordered from major online retailers, or purchased at many garden centers, hardware stores, and department stores with garden sections.