So, you think earthworms are outdoors creatures? Well, you can
actually raise them indoors, and use their castings to improve your
soil, indoors and out.
Container
Make it large and manageable, space 8 to 12 inches deep. They feed
on the top layers of the bedding. Bins can be plastic or wood.
Drill 8 to 12, ¼-inch-diameter holes in the bottom and sides for
aeration and drainage. Drill more holes if using plastic or bedding
stays wet. Place a tray under bin to collect “tea” that drips from
bin. Tea makes good fertilizer for houseplants.
Bedding
Options; shredded cardboard, newspaper, or coir (coconut husks); and peat moss. Mist bedding with water if it looks dry.
Cover bins to keep worms in dark. Keep temperatures between 40°F and 80°F for survival, place bins in cellar, warm garage.
Red wigglers thrive in temperatures between 55°F and 77°F (Worms
from garden, night crawlers, prefer cooler and deeper soils.) Buy red
wigglers through the mail or at a bait shop.
One pound of red wiggler worms (about 1,000 worms) can eat a 1/2 pound of scraps a day.
Food
Feed worms vegetable scraps, fruit peels, coffee grounds, tea bags,
crushed egg shells, and even leftover pasta. No spicy foods. Avoid
meats, fish, fatty and oily foods, and bones. Lay a thin layer on top
of bedding. Worms feed in the dark.
A small amount of potting soil or cornmeal help your worms digest their meal.
Harvest
After 3 to 4 months your worms should have eaten the bedding and the
scraps. Top layer of matter should be dark brown and the consistency of
chunky sand. Harvest the castings. Push the castings to side, add more
bedding and scraps. Worms will go to the new bedding and scraps. Dig
out castings and add more bedding and scraps. Make sure to pick out
stray wigglers and return