Biologically active soil conditioner containing mycorrhizal fungi and rhizosphere bacteria. Creates a secondary root system that provides a dramatic increase in the plant s ability to extract water & mineral elements. Contains terra-sorb crystals that absorb and release water to the root zone, as well as beneficial bacteria. Encourages greater likelihood of survival for their new tree or shrub. Can also be used for woody perennials, such as roses. One packet treats three 1-gallon containerized trees/shrubs, or one 1-inch caliper trunk.