GAIA GREEN Gypsum is a mined mineral fertilizer rich in calcium and sulphur. In addition to providing key nutrients, GAIA GREEN Gypsum benefits soil structure, porosity, air circulation, and water infiltration and drainage. GAIA GREEN Gypsum is approved for use in organic agriculture for correcting calcium and sulphur deficiencies and mitigating soil salinity. GAIA GREEN Gypsum is approved for use in organic agriculture by Ecocert Canada. An excellent source of calcium and sulphur. Mitigates soil salinity. Improves soil structure.