GreenTree Ultimate BlendTM is an organic supersoil for container gardening made using our proprietary aging process. It contains a blend of GreenTree CocoTM, sphagnum peat and specially selected organic nutrients, worm castings, bat guano, humic acids, and GreenTree BiocoreTM, a biochar* that encourages microbiology, improves water retention, and locks in carbon. This soil contains all the nutrients typically needed for a full crop cycle.