Bio-tone Starter Plus is an all-natural plant food enhanced with biostimulants, beneficial bacteria and mycorrhizae. This proprietary formula works naturally within the soil to help plants establish fast, withstand environmental stress, promote deeper roots, better blooms, and improve soil structure. Microbe enhanced all-natural plant food. Includes both Endo and Ecto Mycorrhizae. Grows larger root mass to help plants establish fast. Reduces transplant loss. 4 lb. bag.