Our Soilless Grow Media is designed for use with most organic and conventional fertilizers. This mix is scientifically formulated to provide an optimum balance of drainage, aeration, and moisture holding properties. This growing mix contains our premium green compost which provides beneficial microbial organisms. Calcium limestone and Dolomite to help buffer pH keeping it in the ideal range to promote vigorous plant growth. This soil mix also contains a weak fertilizer starter charge to help promote rooting and growth for the first few irrigations. Formulated for use in greenhouses, potted containers, raised beds and hydroponic applications.