How to store onions
Best place: the counter or pantry, then the fridge. Onions keep for 1 month at room temperature; the fridge stretches that to 2 months, and the freezer to 10 to 12 months.
1 month
from the package date
2 months
from the package date
10 to 12 months
best quality within
How to tell onions have gone bad
General signs for produce: fresh vegetables, the group USDA lists onions under.
- Slimy, wet leaves on greens that were crisp before
- Soft or mushy spots on vegetables that were firm
- Sprouting or wrinkled skin on potatoes and onions
- Mould, often white or fuzzy, near the stem or cut end
- Sour or off smell replacing a vegetable's usual earthy scent
More on produce: fresh vegetables. The times above are quality guidelines, not safety limits; food that shows these signs goes out regardless of the date.
Storage habits that make the difference
Store leafy greens loosely wrapped in the crisper drawer, ideally with a paper towel to absorb extra moisture. Keep potatoes, onions and garlic in a cool, dark, dry place outside the fridge, and store potatoes away from onions since they spoil each other faster. Trim and wash vegetables just before cooking.
How to store other produce: fresh vegetables
Source: USDA FSIS FoodKeeper dataset (public domain). How we decode the data.