Harris® Horticultural Charcoal- 64oz (2qt)
Premium Soil Amendment - Increasing soil carbon, nutrient content, water retention, water-soluble nutrients, and beneficial microbial life. Naturally Derived - Made from plant materials such as hardwoods, grasses, and agricultural and forest residues. Easy to Use - Simply mix in with houseplant soil 1 part biochar to 9 parts potting soil.