The Worm Farmer’s Handbook: Mid- to Large-Scale Vermicomposting for Farms, Businesses, Municipalities, Schools, and Institutions

Turning waste into wealth sounds too good to be true, but many worm farmers are finding that vermicomposting is a reliable way to do just that. Vermicast―a biologically active, nutrient-rich mix of earthworm castings and decomposed organic matter―sells for $400 or more per cubic yard.