Gro-Power, Inc. has been manufacturing Humus based fertilizer/soil conditioner products since 1966. All of our products contain true plant-based Humus, Humic Acids and benecial soil bacteria. These natural elements aid in improving soil texture (i.e.; aiding in breaking up clay soils, increasing moisture holding capacity in sandy soils) balancing soil chemistry and keeping plant food in forms plants can assimilate. Gro-Power products are odor free, environmentally safe, and free of waste products, such as animal waste, poultry litter, sewage sludge or toxic mine tailings. All products contain non-staining Iron, Manganese & Zinc.