Hormex? Rooting Powders are comprised of 5 strengths of IBA (Indole-3-butyric acid) based Hormogenized rooting powders. After 55 years it's still the finest root producing powder and the only company to offer 5 strengths for every rooting variety and propagating condition. Not all plants require the same strength and we know this. Hormex? Rooting Powders are naturally time released so they remain effective longer than other products on the market. Used for rooting cuttings (cloning) of plants. For moderately difficult to root plants.