Worm Bin FAQ

Worm castings make great soil conditioners.

Using red worms or Eisenia fetida to make compost, called vermicomposting, is much easier when worm bins are used rather than just releasing worms into the garden. A worm bin is like a tank for worms, their food and their nutrient-rich droppings or castings.

Temperature

Worm bins can be kept indoors or outdoors. Outdoor bins need a tight-fitting lid so worm-eating predators cannot get in. Worms live best in temperatures of 40 to 80 degrees F, according to Canada's Office of Urban Agriculture.

Materials

The worm bin can be an elaborate commercially made wooden box or a large plastic trash container that is at least 8 inches deep. Several holes need to be on the bottom for drainage. An optional screen can be placed on the bottom with a mesh opening of 3/16.

Warnings

If using a plastic worm bin, do not use a plastic lid unless many air holes are drilled into it. Worms need air, too. Plastic bins may cause more moisture inside of the bin, so check to be sure the bedding has not turned to mud.

References

• Canada's Office of Urban Agriculture: Urban Agriculture Notes: Composting with Red Wriggler Worms
• University of Nebraska-Lincoln: Vermicomposting: Composting with Worms
• New Mexico State University: Vermicomposting
• "Martha's Vineyard Magazine": Organic Gardening with Red Wiggler Worms

Resources

• Recycling Advocates: Vermicomposting
• California Deaprtment of Resources, Recycling and Recovery: Vermicomposting
• University of California: Images of Eisenia Fetida