Phosphate is typically bound to other elements in the soil. Soil-bound Bacteria and Fungi are essential in freeing it up and making it available to the plant. If your soils contain sufficient levels of Carbon and Organic matter, and are free of chemicals that hamper microbial life, they will be better at supplying phosphate and other nutrients to the plant.
Phosphate is not very mobile in the soil; therefore, it should be broadcast, or band placed and incorporated into the soil, or applied in-row with planting.
- Planting trees and vines: Apply directly into the planting hole as it does not burn roots.
- In planted areas: broadcast as a top-dressing and till into the soil without disturbing the roots.
Add to Growing Mediums: It can be added to compost or growing mediums for a sustained release of phosphate and calcium.