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The Worm Farmer’s Handbook

Mid- to Large-Scale Vermicomposting for Farms, Businesses, Municipalities, Schools, and Institutions

Techniques and systems for processing food scraps, manure, yard debris, paper, and more

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. Compare that to regular compost, sold at about $30 a cubic yard, and you’ll see why vermicomposting has taken root in most countries and on every continent but Antarctica.

Vermicomposting is also one of the best sustainable solutions for organic waste management. Vermicomposting manure and crop wastes on farms improves crop yields while reducing demand for off-farm inputs. Vermicast has higher nutrient levels and lower soluble salt content than regular compost, and it improves soil aeration, porosity, and water retention. Plus, vermicast suppresses plant diseases and insect attacks. Municipalities, businesses, community gardens, schools, and universities can set up vermicomposting operations to process food residuals and other waste materials.

The Worm Farmer’s Handbook details the ins and outs of vermicomposting for mid- to large-scale operations, including how to recycle organic materials ranging from food wastes and yard trimmings to manure and shredded office paper. Vermicomposting expert Rhonda Sherman shares what she has learned over twenty-five years working with commercial worm growers and researchers around the world. Her profiles of successful worm growers across the United States and from New Zealand to the Middle East and Europe describe their proven methods and systems.

This book digs into all the details, including:

  • Choosing the right production system
  • Regulatory issues and developing a business and marketing plan
  • Finding and managing feedstocks
  • Pre-composting: why and how to do it
  • Monitoring an active worm bed
  • Harvesting, screening, testing, packaging, and storing vermicast
  • Markets for earthworms and vermicast
  • Food security: how vermicast benefits soils and plants
  • Keys to success: avoiding common pitfalls

From livestock farms and restaurants to colleges, military bases, and prisons, Sherman details why and how commercial-scale vermicomposting is a fast-growing, sustainable solution for organic waste management. The Worm Farmer’s Handbook is the first and only authoritative how-to guide that goes beyond small-scale operations and demystifies the science and logistics of the fascinating process that is vermicomposting.

About The Author


About Rhonda Sherman

Extension Specialist Rhonda Sherman is the director of the Compost Learning Lab at North Carolina State University and one of the leading experts worldwide on vermicomposting. Rhonda travels extensively to present workshops and to consult with farmers, businesses, and institutions on the development and management of vermicomposting systems. She organizes the highly successful annual NC State Vermiculture Conference, which for nineteen years has drawn participants from across the United States and around the globe. She is a co-editor of Vermiculture Technology and has written extensively about composting and vermicomposting in her role with NC State University.

Books By Rhonda Sherman

Pages:256 pages
Book Art:Full-color photographs and illustrations throughout
Size: 7 x 10 inch
Publisher:Chelsea Green Publishing
Pub. Date: November 6, 2018
Paperback: 9781603587792

Available In/Retail Price

Paperback, 256 pages, $29.95

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