2 cu. ft. Castine Blend. An enriched mixture of fully cured locally-sourced cow manure compost, peat, biochar, worm castings, dehydrated poultry manure, kelp meal, lobster meal, greensand, lime, and mycorrhizae. It is carefully formulated to provide an ideal balance between soil texture, structure, water retention, drainage, and aeration for growing large, healthy vegetables, herbs, and flowers in raised beds, planter boxes, or other container gardens.