Onions
The answer
Whole dry onions last 1–2 months in a cool, dark pantry.
Caution Store away from potatoes — each speeds the other’s spoilage.
How long it keeps
Fridge (40°F) 2 months (crisper, if pantry is warm) safe window
Freezer (0°F) Do not freeze whole best quality
Pantry 1–2 months OK stored right
Discard Discard onions that are mushy, moldy at the neck, or smell rotten.
The answer
A cut onion lasts 7–10 days in the fridge in a sealed container, and 10–12 months in the freezer chopped.
How long it keeps
Fridge (40°F) 7–10 days safe window
Freezer (0°F) 10–12 months (chopped) best quality
Room temp 2 hours max then discard
Discard Discard cut onion that is slimy or has an off smell.
By state & packaging
State Fridge Freezer
Whole, pantry — —
Cut, sealed container 7–10 days 10–12 months chopped
Green onions / scallions 1–2 weeks 10–12 months chopped
Signs it has gone bad
✕ Soft or mushy spots
✕ Black mold under the skin
✕ Sprouting with shriveling
FAQ
Is a sprouted onion still good?
Yes, if it is still firm. Cut out the sprout and use the rest. A soft, shriveled, sprouted onion should be discarded.