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C-Score

This is your definitive guide to what should not be placed in your worm bin. C-rated items can harm your worms, create strong odors, attract pests, or simply fail to break down. Keeping these materials out is one of the most important steps to maintaining a healthy, effortless, and odor-free system.

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B

C

C-rated items

Below is a complete list of items that have earned a Vermicompost Score of C. By avoiding these, you prevent the most common composting problems. Click on any item to learn the specific reason why it is unsuitable for a worm bin.

Charcoal ash

Peppers

Lemon

Cooked food

Lime

Mandarin

Glossy paper

Cardboard with plastic coating

Orange

White office paper

Sweet Corn

Oily food & sauces

Plastics

Dog, cat waste

Earth, soil and root balls

Grapefruit

Nut shells

Strongly spiced food

Metals, glass, ceramics

Salty or pickled foods

Coconut

Chemicals

Household dust

Sick plants

Dairy products

Meat, fish, and bones

Cigarette butts and ash

Onions

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B

C

Score A (Ideal)

These materials are readily consumed and break down quickly and easily. They form the ideal primary diet, contributing optimally to healthy, fertile vermicompost. Discover A-rated items such as Apple, kiwi, carrot, cucumber, cardboard, or coffee grounds.

See all A-rated items

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B

C

Score B (In moderation)

These materials are generally suitable but require caution with quantity. Adding too much can potentially disturb the bin’s balance, slow processing, or lead to minor issues. Pay attention when adding these. Discover B-rated items such as avocado, mango, tomato, cauliflower, bread, or hard pits.

See all B-rated items

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