Many people have the habit of storing vegetables in the refrigerator to keep them fresh longer. However, food experts wa.rn that storing whole onions in the fridge will cause them to spoil quickly instead of lasting as long as expected.

According to food expert Melissa Alink, author of Little House Living, whole onions absorb moisture quickly in cold environments, causing them to become soft, mushy, and prone to rotting. She explains, "Whole raw onions should not be stored in the refrigerator. The low temperature causes the starch in onions to convert into sugar, which makes them soften and spoil faster."

Experts recommend storing onions in a dark, dry, and well-ventilated place such as a kitchen cupboard or drawer, avoiding areas with high temperatures that can cause sprouting. Additionally, onions should not be kept in plastic bags because plastic traps moisture, leading to rot. Instead, use mesh bags, old nylon stockings, wire baskets, or containers with ventilation holes.

Iowa State University also advises that if nylon stockings are used for storage, onions should be placed individually into the stockings, tied off, and hung up to improve air circulation and extend shelf life.

Biologically, onions—as with many other vegetables—continue to respire after harvest. In cold environments, onions convert starch into sugar to generate energy, which leads to softening. Conversely, at higher temperatures, onions consume sugars to sprout, reducing sweetness and increasing bitterness.

For cut, chopped, or cooked onions, refrigeration is necessary. They should be wrapped tightly with plastic wrap or stored in airtight containers to limit exposure to ethylene gas—a natural gas that accelerates food ripening.

Alink notes, "Cut or cooked onions should not be left at room temperature, as they spoil quickly. It’s best to wrap them well and keep them refrigerated for up to two weeks."

These small storage tips can help your family avoid food waste and keep onions fresher for longer.