How to choose container
When choosing your bins, determine how many worms you will want.
The larger you make the container, the more worms it can sustain. Estimate one pound of worms for every square foot of surface area. One pound of worms is able to compost a ½ pound of food per day.
Keep the depth no more than 24 inches deep because composting worms will not go further down than that.
Also, use a second container underneath to collect drainage.
Once you have your bin you need to make sure it is ventilated. For plastic, drill several 1/8 inch holes about 4 inches from the bottom (this is NOT for the bin that you will use for drainage). If you don’t drill the holes, the worms will stay at the bottom of the bin and you may drown them. Untreated wooden bins are naturally ventilated because of the structure of wood.
Your bin will also need a cover to prevent light from getting in and to prevent the compost from drying out. Choose or make a lid that can be removed if your compost is too wet. You can use a canvas tarp, doubled over and bungee-corded on, or kept in place with wood. Burlap sacks also work well, and can be watered directly. You can also simply use a cover that comes with the rubber storage totes.
How to prepare the box for worms
Fill your bin with thin strips of paper scraps, unbleached corrugated cardboard or shredded newspaper, straw, dry grass, or something similar. This provides a source of fiber to the worms and keeps the bin well-ventilated. Sprinkle a handful of dirt on top, and thoroughly moisten. Allow the water to soak in for at least a day before adding worms.
What types of worms to buy and where to get them
There are several varieties of worms that are bred and sold commercially for vermicomposting; just digging up earthworms from your backyard is not recommended.
You can find worms all over the place online. Also local gardening clubs are a good place to start.
The worms most often used are Red Wigglers. Another variety to consider are European Night crawlers. They do not reproduce quite as fast as the red wigglers, but grow to be larger, eat coarser paper and cardboard better, and seem to be heartier.
Did You Know?
Red wigglers dont have eyes and breathe through their skin.
Having two sex organs, you can breed them even if you only have one worm.
Red wigglers will generally eat their own weight daily.
Most worms probably live and die within the same year.However they are said to double every 90 days.