Eve's Premium Grade Horticultural Vermiculite for Bonsai and all house plants including cactus for Soil additive Conditioner Mix - 20 Cups(dry) Vermiculite is a natural mineral, permanent, clean, odorless, non-toxic and sterile Holds moisture and nutrients & makes them available later to plant roots Leave more room for air in the soil so that the plants can breathe Promotes faster root growth and quick anchorage for young roots Coarse, Premium Grade, 20 Cups(dry) bag