Vermicrop Organics? Premium Potting Soil offers a rich blend of professional-grade organic materials. Coconut coir, earthworm castings, peat moss, Vermicrop Organics? premium compost, bat guano and mycorrhizae are some of the key elements in this rich potting soil. This formula was created and tested by a team of industry leaders to provide a perfect blend of organic materials and plant food. Bulk is restricted to a 20 yard minimum.