Coast of Maine 1.5 cu. ft. Stonington Blend Growers Soil Mix. It is an OMRI listed, complex super soil designed for high performance growing in containers and large pots. This blend incorporates sphagnum peat moss, coir, perlite, compost, worm castings, fish bone meal, lobster and crab shell meal, kelp meal, alfalfa meal, and mycorrhizae. It is rich in nutrients and formulated with amendments designed to boost budding, blooming, and root development. For best results, grow in 15-gallon containers.