SoilKey Gypsum Rock Dust

Gypsum contains calcium, sulfur bound to oxygen and water and can improve overall plant growth and can improve the physical properties of some soils, especially heavy clay soils. Gypsum has been shown to increase calcium availability and in some instances lower pH. This enhances deep rooting and the ability of plants to take up adequate supplies of water and nutrients. Gypsum is moderately soluble in water. Calcium moves very slowly from one plant part to another, and fruits at the end of the transport system get too little. Calcium must, therefore, be constantly available to the roots.