Consciously harvested with no fillers or additives, Biologic Systems Humus is composed of 100% pure forest humus. Thousands of years in the making, our Humus is produced entirely by mother nature through the process of natural decomposition of diverse forest material. As a soil amendment, Biologic Systems Humus provides organic inputs that have accumulated over time with natural, microbially-driven, soil humification. Humus also aids in the retention of water and nutrients; creating stable, long lasting soil for your garden.