DIAMOND BLACK is an organic form of Leonardite containing an exceptionally high percentage of beneficial plant-active organic humic acids. Diamond Black is rich in organic substances that afford growers the advantages of natural organic matter in a highly available and easy to use form. It increases the uptake of micronutrients. Can be applied to all cultivated plants including fruits, flowers, vegetables, trees, vines and ornamentals. Use in soil, potting mixes or soil-less rooting media.