Worm Castings & Earthworms
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What to Feed Your Worms

If you're looking to start your own worm bin, or have already started one, here's a handy guide to what you can and cannot feed your worms.

TIPS: Feed your worms a diverse diet and always feed in moderation. If you feed the worms too much, the food may become moldy. Remove moldy food as it makes the system vulnerable to infestation by other microorganisms. You can always store leftover food in a Ziploc bag and freeze for later use.


Watermelon Rinds Vegetables Citrus
Canteloupe Rinds Fruits Onion
Coffee Grounds & Filter Papers* Garlic
Tea Leaves & Bags Meat or Dairy Products*
Washed, Crushed Egg Shells Oily or Salty Products
Newspaper (no shiny or coated paper) Grass Clippings*
Cardboard, Paperboard (soaked first)
Paper Egg Cartons




Coffee Grounds: Too much will make the bin acidic.

Meat or Dairy Products: Worms actually do eat animal products. However, because it takes much longer for meat and dairy products to break down to the point where worms can process them, these products will rot before they are consumed. The rot smells and therefore attracts pests and rodents. It's best to avoid these products.

Grass Clippings: Grass clippings heat up in worm bins and kill your worms. Can only be fed in small quantities.


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