Earthworms are nature's great recyclers, consuming decaying organic matter and digesting it into a rich, clean material full of water-soluble nutrients easy for plants to uptake and use as fertilizer. This material is called vermicast or vermicompost and is a useful soil amendment and long-term fertilizer. For those among us who prefer sustainable nutrition and soil improvement program for their plants, vermicast is an excellent and easy choice to make in both a home garden or commercial farm.