What is soft rock phosphate?

Question

What is soft rock phosphate, and how best to apply it in the garden?

Answer 1

This link provides a good explanation: http://www.dirtdoctor.com/Soft-Rock-Phosphate_vq2613.htm

For additional information on phosphorus, this article will help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm