What Can Go In Your Worm Bin? A-Z List

Last updated on October 23rd, 2023 at 08:50 pm

Do my worms eat potato peelings? Can I feed onion? What about kiwi? We receive many inquiries about the right food for the compost worms in your homes. It’s nice when you care so much about the well-being of your fellow inhabitants! With our food list (almost) nothing can go wrong.

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What waste can be put in the worm bin? 🟢

Raw, chopped and moist fruit and vegetable scraps, leaves (no nut leaves), eggshells (pulverized), plant scraps. Newspaper & cardboard should make up 20% of the feed. Worms need the fiber it contains.

What Can Go In Your Worm Bin? A-Z List

Compost worms love tea and coffee. (Max 1/3 of feed) Please crumble coffee grounds to avoid mold. Tea bags are allowed – provided they are free of micro-plastics.

What is not allowed in the worm bin? 🛑

Toxic, antibacterial, dry, woody, bones, chemicals, dairy, citrus, meat, bread and cereal products, glossy paper, cooked, marinated and salted food should not be in the worm bin.

The worms and MOs would either take a very long time to break down, or perish from it. Please avoid feces & cat litter as bacteria may not be broken down sufficiently.

How often to feed? 📅

You can feed the compost worms daily or a larger amount every 3rd day. If there is less organic waste, that is not a problem either. An adult worm weighs about 0.4g and eats half its weight daily. Our starting population contains ~200g of worms, which then multiply. If there is odor, too much was fed!

Indicator that everything is going well: If you take away the organic waste on top (2-4cm), you will see compost worms.

🟡 Pineapple, fruit
💚 Pineapple, peel
💚 Eggplant
🟡 Avocado, fruit leftovers are ok, a whole avocado will be soggy and not suitable for the worm bin.
🟡 Avocado, peel The peel is very hard, so it should be chopped small.
🟡 Banana, fruit
💚 Banana, peel
💚 Broccoli Larger quantities may smell sour.
🟡 Chili Possible in small quantities.

💚 Coffee grounds Clumpy coffee grounds should be loosened beforehand – risk of mold.

🟡 effective microorganisms Worms have a variety of microorganisms in the digestive tract, which have an approximately equal effect as EMs. Thus, you already have the effect of EMs in your box.
💚 Eggshells They must be powdered for the worms to utilize them. Eggshells alone are not a substitute for mineral mix.
🛑 Vinegar
🛑 Fermented & preserved Worms like to avoid vinegar, oil and strong spices.
🟡 Bleached paper (kitchen roll, handkerchief) Now and then like. You should not feed bleached in large quantities.
💚 Cooked vegetable scraps If only boiled in water they are possible as food. Be careful, can become soggy.
🟡 Pomegranate, peel Will not be utilized within the 6 months for some boxes.
🟡 Hair Recycling time: 4-6 months, possible in small quantities.
🛑 Glossy paper
🛑 Wood ash
🟡 Ginger Decoction as tea – yes. Only tiny amounts should be given raw.
💚 Potato peels cooked.
🟡 Potato peels raw Will not be touched by worms in some boxes. Do like to sprout.
🛑 Seeds (stone fruit) Do not bother the worms, so can be added to the box. Reappear whole at harvest.
🟡 Kiwi, fruit
💚 Kiwi, peel
💚 Toilet paper rolls (cardboard)
🟡 Garlic peels can be fed, but should be moistened or fresh organic waste on top. Garlic in itself has an antibacterial effect, so only in small quantities.
🟡 Kombuchascobys/Kefir Possible in small quantities. Will not compost in every box.
💚 Leaves Important, leaves should be dry. (No nut leaves or bay leaves).
💚 Leeks Large quantities can sometimes have a strong smell.
🛑 Bay leaves
💚 Corn, kernels & strings.
🛑 Corn, cobs Will not decompose.
🛑 Tangerines
💚 Almond skin
🟡 Mango, fruit
🟡 Mango, skin
💚 Chard
🛑 Chestnuts, skin (sweet chestnuts)
💚 Melon, fruit Caution: very moist, add shredded paper or cardboard right away.
💚 Melon, peel
💚 Monstera, leaves
🛑 Oil
💚 Palm, leaves
💚 Pepper seeds may sprout – tear out or bend over.
💚 Plums
💚 Mushrooms
🟡 Radish/radish leaves are fond of worms. Feed radish/radish by itself only in small amounts.
🛑 Lawn clippings It should not compact and should not develop heat. Dry grass clippings can be added in small amounts.
🛑 Rice
💚 Rhubarb
🛑 Salt
💚 Cut flowers Strongly woody parts of stems are not utilized. Treated flowers should not be fed.
💚 Celery
🟡 Asparagus Asparagus may have a strong odor in large quantities.
🟡 Sweet potato, skin raw.
💚 Sweet potato, skin cooked.
🟡 Tea bags Unfortunately, microplastics can be found in some tea bags. A natural tea or coffee filter the worms will gladly eat.
💚 Tea set
🛑 Pasta (noodles, cakes, bread,…).
💚 Chickweed
🛑 Lemon
💚 Zucchini
🛑 Sugar
🟡 Onion peels can be fed, but should be moistened or fresh organic waste on top. Onion juice acts as a worm deterrent, so only feed in small amounts.


  • James Jones

    Meet James Jones, a passionate gardening writer whose words bloom with the wisdom of an experienced horticulturist. With a deep-rooted love for all things green, James has dedicated his life to sharing the art and science of gardening with the world. James's words have found their way into countless publications, and his gardening insights have inspired a new generation of green thumbs. His commitment to sustainability and environmental stewardship shines through in every article he crafts.

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