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Composting - worm

Worm composting or vermicomposting is the practice of using worms to make compost. The word vermi is the Latin word for worm, and worms like to feed on slowly decomposing organic materials (e.g., vegetable scraps). The end product, called castings, is full of beneficial microbes and nutrients, and makes a great plant fertilizer.

Hours listed on this page may change without notice.

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  • Board Meetings
  • Conferences and Workshops
  • E-Waste
  • Household Hazardous Waste
  • Other
  • Outreach
  • Disposal Site


Mass Wiggle

6155 Lakeville Highway
Petaluma, CA 94952

NotesFee: provides worms and vermicompost and vermi-extract. Call or email Dave for a tour.

Sonoma County Master Gardeners

NotesMaster Gardener volunteers are trained and certified by the University of California Cooperative Extension. Call or email your home composting questions.

Sonoma Valley Worm Farm

NotesBy appointment. Products available are Worms, Vermi-extract, and Vermicompost. See website for more information.

The Compost Club