Score C: Avoid this in your worm bin

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

Coconut

Onions

Peppers

Chemicals

Meat, fish, and bones

Salty or pickled foods

Lemon

Metals, glass, ceramics

Plastics

Glossy paper

Oily food & sauces

Cooked food

Dog, cat waste

Cigarette butts and ash

Dairy products

Lime

Orange

Earth, soil and root balls

Sweet Corn

Household dust

Mandarin

Sick plants

Cardboard with plastic coating

Strongly spiced food

Grapefruit

Nut shells

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.

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.

Frequently asked questions

What is the biggest risk of adding a C-rated item?

I accidentally added something from this list. What should I do?

Why can't I add citrus peels like lemon or lime?

C-rated items

Frequently asked questions

Almost there