GreenCal gypsum powder is a natural 98% pure calcium sulphate dihydrate. GreenCal gypsum powder is mined and then milled to a 45 to 75 micron powder (95% passing through 45 micron). The very high purity and ultra fine particle size of GreenCal gypsum powder make it readily available in the soil compared with agricultural gypsum products.

GreenCal gypsum powder supplies readily available calcium and sulphur without significantly affecting soil pH. GreenCal gypsum powder is suitable for use through many fertigation systems and is used in the manufacturing of suspended gypsum and formed granular gypsum products.