Natural Gypsum 10L = Approx. 11kg Gypsum or Calcium Sulphate Dihydrate (CaSO4.2H20) is Nature’s very own plant super food. It increases and maintains plant health by providing them with large amounts of soluble Calcium and Sulphur: two elements essential to plant growth. Gypsum is extracted from an open-air mine in Yzerfontein using recycled water only. Here are its features: Soluble calcium helps overcome the dispersion effects of magnesium or sodium ions, enhancing soil aggregation and porosity to improve aeration and water infiltration Agricultural standards require gypsum of only natural sources to be used on plants and with current purity levels of 85%; our gypsum is literally the best there is.