Compost is decomposed kitchen and yard waste used as organic matter in soil. Composting material and adding it to a garden improves soil drainage and provides a small amount of nutrients. Worm composting can be done both indoors and outdoors, says the City Farmer website, making it ideal for those living in apartments or those without adequate garden space. Worm composting requires few materials and is easy to build.
Drill 20 holes in the bottom of each plastic tub to provide drainage and allow worms to travel freely between both bins, suggests the Washington State University Extension. Use a 1/4 drill bit.
Add further holes at the top of each bin, all the way around the top edge, spaced 1 to 1 1/2 inches apart for ventilation.
Drill 30 holes at the top of one of the tub's lids.
Soak newspaper ripped up into 1-inch strips in a 5-gallon plastic bucket, recommends the University of Kentucky. This wet material acts as your bedding material. Cover the bottom of the plastic container with 3 to 4 inches of newspaper. Fluff up the newspaper so that it is not caked together.
Add worms to the bedding. Cut a piece of cardboard to the size of your tub and place the cardboard over the bedding and worms. Wet the cardboard.
Place one bin inside of the other and place both bins, supported on top of bricks, in a cool, well ventilated area such as the garage or a shaded portion of the yard. Place the lid of one of the containers underneath both bins to catch the run off from the broken-down materials inside. Use this liquid as fertilizer in the garden, suggests Washington State University.
Add kitchen waste to the bin and keep the mix moist, says the University of Kentucky. Do not throw in fatty meats, dairy or eggs.