Black Gold, 16 QT, Natural & Organic Potting Mix, Rich, Loamy Mix Is A Premium Choice For All Purpose Gardening Applications, Our 100% Organic Base Consists Of Screened Earthworm Castings, Canadian Sphagnum Peat Moss, Compost & Forest Humus, We Blend In Perlite & Pumice To Ensure Optimum Aeration, Listed By The Organic Materials Review Institute, OMRI For Organic Production, Now Contains Resilience- Sun Gro's Brand Name For Patented Growing Mixes Enriched With Silicon For Stronger Stems & Improved Root Mass.