Generally
Store onions in a cool, dry, and dark place, such as a cupboard, pantry, or cellar. Ensure the storage area has good ventilation to prevent moisture buildup, which can cause mold or sprouting. Use a well-ventilated basket, bin, or mesh bag to allow airflow around the onions, keeping them fresh for longer. Onions are often stored with garlic, as both thrive in similar conditions, but it's best to keep them in separate containers to avoid odor transfer.
Do not store with
Fruits, potatoes and carrots. Learn more about what not to store together.