Castine Blend Organic & Natural Raised Bed Mix is specially formulated for robust raised-bed garden growth during the plant life cycle. This ready-to-use blend is enriched with worm castings, mycorrhizae, biochar, greensand, kelp meal, and lobster and crab shell meal. Its dynamic mix of ingredients provides the structure, water retention, drainage, and aeration for growing strong, vigorous vegetables, herbs, and flowers in raised beds, planter boxes, or any other container gardens. That broad range of benefits supports the biodiverse living soil that nurtures the richest results.