Irises: Buckwheat as a green manure?, 0 by NeilTR

NeilTR wrote:
Picture updates.... This is just before I've turned the buckwheat back into the soil. It releases a chemical that keeps weeds from sprouting. I learned that phosphorus in the soil that other plants can't absorb is extracted from the soil and stored in the roots, stalks, and leaves during the first forty days of growth, up to the onset of flowering. As the plants decay other plants can now absorb the phosphorus. The test will be how the iris replanted in this bed perform next year.