A
B
C
A-rated items
Below is a complete list of items that have earned a Vermicompost Score of A. These are your go-to ingredients for a happy, productive, and odor-free system. Click on any item to learn more about preparation and specific benefits.
Parsnip
Strawberry
Green Beans
Cress
Tarragon
Blueberries
Straw
Apple
Bok Choy
Chives
Thyme
Green Asparagus
Salsify
Eggplant
Cardboard
Egg cartons
Celeriac
Spinach
Paper tissues
Grapes
Dill
Kiwi
Wilted flowers & houseplants
Toilet paper tubes
Iceberg Lettuce
Portobello
Pears
Zucchini
Carrot
Ginger
Bananas
Chervil
Parsley
Figs
Nail clippings
Coffee filters
Beetroot
Mushroom
Paper towels
Weeds
Raspberries
Runner Beans
Celery
Coffee grounds
Fennel
Potato
Sweet Potato
Lemongrass
Hair
Waste from small vegetarian pets
Asparagus
Leaves
Dried grass
Cucumber
Lettuce
Romaine Lettuce
Endive
Sage
Passion Fruit
Melon
Lamb’s Lettuce
Rosemary
Beets
Cilantro
Arugula
Newspaper
Chicory
Bell Pepper
Blackberry
Mint
Pointed Sweet Pepper
Eggshells
Basil
Physalis
Watercress
A
B
C
Score B (In moderation)
A
B
C
Score C (Avoid)
These materials should never be added to your vermicomposter. They pose risks like harming worms, attracting pests, causing bad odors, or simply won’t break down. These belong in a different waste stream. Some C-rated items to add with great caution are coconut, lime, peppers, onions, glossy paper, or dairy products.
Frequently asked questions
Why are these items rated A?
A-rated items have the best balance of carbon, nitrogen, and moisture. They are easy for worms to consume and break down quickly without disrupting the bin’s pH balance or creating strong odors.
Can I only feed my worms A-rated items?
Yes, you could, and your bin would be very healthy! A diet based on A-rated items is the surest way to an effortless system. B-rated items can be added for variety, but these A-rated staples should form the core of their diet.
What's the most common mistake with A-rated items?
The only common issue is overfeeding. Even with ideal food, adding too much at once can overwhelm the worms. It’s always best to add food in small, regular amounts rather than all at once.

