Earthworm compost, also referred to as worm castings, is made by providing earthworms a home and feeding them regularly. The worms digest most of your natural kitchen scraps, with the exceptions of meat, seafood and dairy products. They then pass these things through their bodies and excrete worm compost, something regarded to as "black gold" by avid gardeners. Packed with nutrients in a form your plants can use, earthworm compost is a boon to garden and lawn alike. Tend your earthworms well, and you will not run out of this valuable resource.
Making Your Worm Bin
Label the three identical opaque plastic bins as 1, 2 and 3.
Drill 1/4-inch holes into the bottoms of bins 2 and 3. Create 20 to 30 holes; no particular spacing is required, but make them pretty evenly over the surface. Discard any plastic scraps.
Shred and moisten the newspaper so that it is wet but not dripping. Cover the bottom of bin 2 with it. Nest bin 2 inside bin 1 so that bin 1 acts as a drainage collector for your worm bin.
Fill bin 2 about three quarters of the way full with soil. Mix in about a cup of cornmeal; earthworms have gizzards to help them digest food, like chickens. The cornmeal will help them grind their food and digest it more easily.
Moisten the soil so that when you grab a handful, it forms a ball and then falls apart. Do not moisten it so much that it is soggy. Keep soil at this moisture level, since worms need some moisture (but not flooding) to live.
Bury natural kitchen scraps (no plastic or foil, but paper and cardboard are OK) in the soil to dissuade pests (and pets) from investigating.
Add worms to the bin and cover it with a piece of cardboard. Earthworms prefer the dark. Feed kitchen scraps to your worms; always bury them in the soil and recover the bin with cardboard.
Harvesting Earthworm Compost
Place bin 3 on top of bin 2. Fill it with wet newspaper, soil, cornmeal and kitchen scraps like when you first made the earthworm bin.
Cover bin 3 with a fresh piece of cardboard. Do not put any more kitchen scraps inside bin 2.
Monitor bin 3 and add kitchen scraps daily; within a few days, the worms will have migrated from bin 2 to bin 3 through the holes, searching for food.
Remove bin 2 from underneath bin 3. Replace bin 3 on top of bin 1. Use the earthworm compost for your garden or lawn.
Repeat the process any time your active worm bin is full of earthworm compost.