Stonington Blend Grower’s MixStonington Blend Growers Mix Uses: Containers and large pots. Grows the most amazing tomatoes & vegetables! Coast of Maine Organic Products Stonington Blend Growers Mix is a complex super soil designed for high performance container growing. This soil incorporates mycorrhizal fungi, kelp, fish bone and alfalfa meal, as well as worm castings, peat, coir and lobster compost. When growing in 15 gallon containers, there is no need for additional