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How do I build a worm composter?

Last Updated: November 17, 2011

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Worm composting can be done inside or outside in an area protected from high temperatures. The worms will die if exposed to temperatures of 100 degrees F or more. A plastic or wooden container two feet square and one foot deep will accommodate one pound of worms (Eisenia foetida). Provide drainage and aeration by drilling about a dozen 1/8" holes in the bottom and sides of the container. Soak shredded newspaper in water. Squeeze the excess water out and line the bottom of the worm container. Add a couple of handfuls of soil, sand, leaf mold, or finished compost on top of the newspaper. This worm bedding should be kept moist. Finally, add the worms. Feed the worms small amounts at a time at first. The worms will eat any kitchen waste or table scraps, coffee grounds, tea bags, or egg shells (citrus, meat, eggs and cheese should be avoided). In three months, the worms will have about doubled their population and it will be time to harvest the compost.

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