We use wood and plastic containers. Either build or buy, or use your imagination and recycle something like an old dresser drawer, trunk, or discarded barrel. We prefer wood because it is more absorbent and a better insulator for the worms. We use plastic containers but find that the compost tends to get quite wet. Experiment and find out what works for you and your worms.
Guide To Size Of Container
In Worms Eat My Garbage, Mary Appelhof suggests weighing your household food waste for one week (in pounds), and then provide one square foot of surface area per pound. The container depth should be between eight and twelve inches. Options to one large (and heavy) box are a number of smaller containers for easier lifting and moving and more choice of location. The book illustrates a variety of containers.
Depending on the size of the container, drill 8 to 12 holes (1/4 – l/2 inches) in the bottom for aeration and drainage. A plastic bin may need more drainage – if contents get too wet, drill more holes. Raise the bin on bricks or wooden blocks, and place a tray underneath to capture excess liquid which can be used as liquid plant fertilizer.
The bin needs a cover to conserve moisture and provide darkness for the worms. If the bin is indoors, a sheet of dark plastic or burlap sacking placed loosely on top of the bedding is sufficient as a cover. For outdoor bins, a solid lid is preferable, to keep out unwanted scavengers and rain. Like us, worms need air to live, so be sure to have your bin sufficiently ventilated.
It is necessary to provide a damp bedding for the worms to live in, and to bury food waste in.
Suitable bedding materials are shredded newspaper and cardboard, shredded fall leaves, chopped up straw and other dead plants, seaweed, sawdust, compost and aged manure. Try to vary the bedding in the bin as much as possible, to provide more nutrients for the worms, and to create a richer compost. Add a couple of handfuls of sand or soil to provide necessary grit for the worm’s digestion of food.
It is very important to moisten the dry bedding materials before putting them in the bin, so that the overall moisture level is like a wrung-out sponge. The bin should be about three-quarters full of moistened bedding. Lift the bedding gently to create air spaces which help to control odours, and give freer movement to the worms.
The two types of earthworm best suited to worm composting are the redworms: Eisenia foetida (commonly known as red wiggler, brandling, or manure worm) and Lumbricus rubellus They are often found in aged manure and compost heaps. Please do not use dew-worms (large size worms found in soil and compost) as they are not likely to survive.
Source City Farmer