Proven Winners Premium Potting Soil is a professional grade soil for homeowner use made from a blend of composted bark, premium Canadian Sphagnum peat moss and horticultural grade perlite. The 1.5 cubic ft. bag comes premixed with Proven Winners Premium Continuous Release Plant Food, which provides a continuous nutrient release to help ensure consistent feeding while providing a base level of nutrition. It also contains dolomite lime to buffer soil pH, and a wetting agent for thorough water distribution. The result is a medium weight mix with excellent air porosity and drainage - all important features to give you the best growth and most vibrant, colorful flowers, and healthy plants. Proven Winners Premium All Purpose All-purpose Potting soil mix | ZZSPRW101ZS01