Quality Ingredients - Cactus Mix with Mycorrhizae - 16 Dry Quarts Soil! Abundantly rich in natural materials - made with Compost, Worm Castings, Mycorrhizae Made from all premium ingredients including 35-45% volcanic pumice, pumice fines and sand, sphagnum peat moss, coco coir, compost and worm castings, mycorrhizae fungi species. Great soil for a cactus garden, including Lithops (living stones). No mixing needed - just open bag, pour soil into pot or planter and plant succulents.