DIY / Grow

How To Start a Worm Bin

Go easy on your landfill and be good for your garden by turning food scraps into fertilizer.

How To Start a Worm Bin

Vermicompost today!

Imagine this: if everyone in the US vermicomposted their kitchen scraps for one year, the amount of diverted waste could cover the city of San Francisco with a 3 ft deep layer of compost! It’s time we start employing some of our subterranean friends. Use a worm bin – they’re cheap, odorless, and small enough to fit underneath your kitchen sink – to easily turn food waste into nutrient-rich fertilizer for your outdoor or indoor plants.

For best results, keep your wriggling waste consumers happy by feeding them properly

  • 15-20 gallon ecology center worm bin or set of bin-making materials
  • Shredded newspaper
  • Cardboard
  • Water
  • 1lb of worms / sq foot
  • Chopped compostable materials
  1. Drill ½” holes into the bottom and sides of your bin for ventilation and drainage.
  2. Add at least 2 inches of shredded newspaper and cardboard for bedding.
  3. Moisten until damp, not soaked.
  4. Add 1 lb of worms/ sq foot.
  5. Feed your worms! Add chopped compostable materials once a week or daily. Add 2 to 3 inches of bedding each time to hide any food scraps.
  6. Harvest the vermicast (worm poop=black gold) every 3-6 months. Mix vermicast into potting soil or use alone as fertilizer.
Worm food:
  • Fruit scraps and peels (citrus in moderation)
  • Veggie scraps (root vegetables should be chopped to avoid sprouting.)
  • Tea bags
  • Coffee grounds and filters
  • Eggshells
  • Pizza crust and popcorn
  • Non-greasy leftovers
  • Bread and grain
  • Paper towels and tissues
Not worm food:
  • Whole corn cobs
  • Meat, fish, dairy products (may attract rodents)
  • Buttery, greasy, or oily foods
  • Pet waste