Can You Compost Onions?

Yes, you can add onions to the compost heap as long as you aren’t using a vermicomposting process. Onions would be considered green compost ingredients (source of nitrogen).

Onions aren’t recommended for vermicomposting bins because the worms do not like the presence of odorous materials. If you do plan on using onions in a regular compost heap then make sure they are mixed well into the pile. The odor from decaying onions may attract unwanted pests and rodents.


Onions aren’t the only types of fruits and vegetables you can put in the compost. Use our online database to find out what household waste makes good composting ingredients.

Onion Compost