Coast of Maine Organic Products Castine Blend Organic Raised Bed Mix is a rich and diverse soil for growing big and healthy vegetables, herbs and flowers.  It is made with a mixture of manure compost, worm castings, lobster and kelp meals, mycorrhizae, greensand and biochar. It is ready to use straight out of the bag with no need for additional components or tilling. It is OMRI listed for use in organic gardens.