All natural and ready to use. Gypsum will break down clay.
Calcium Sulfate Dihydrate (CaSO2)-2H2O …… 76%
Calcium (Ca) …………………………………….. 17%
Sulfur (S) …………………………………………. 14%
Derived from Mined Gypsum
Also contains non plant food ingredient
A 40 lb. bag will cover up to 4,000 square feet.
Apply 40-80 lbs. per 1,000 square feet. Apply by hand or broadcast spreader.