In the freezer
10–12 months
Yes — freezes well
Quality holds for about 10–12 months at 0°F / -18°C. Frozen food stays safe indefinitely; only quality declines.
Quick answer
Yes: onions keep 10–12 months in the freezer at 0°F (-18°C), compared with 2 months in the fridge.
How to freeze onions
- Wash, dry and cut into pieces; blanch most vegetables for 1–3 minutes first.
- Spread on a tray to freeze individually, then bag and press out air.
- Use from frozen in cooking or smoothies; thawed produce is soft.
How to thaw onions
In the fridge
Move it to the fridge the night before; this keeps texture best.
At room temperature
Only for shelf-stable items; perishable food should not thaw on the counter.
From frozen
Many foods can go straight into soups, sauces, smoothies or the oven.
Yes — freezes wellQuality holds for about 10–12 months at 0°F / -18°C. Frozen food stays safe indefinitely; only quality declines.
Freezer vs fridge vs counter
Onions Per USDA FoodKeeper
On the counterCounter
1 month
cool, dry place
In the fridgeFridge
2 months
at or below 40°F (4°C)
In the freezerFreezer
10–12 months
at 0°F; quality, not safety
More about onions
FAQ
How long can you freeze onions?
About 10–12 months for best quality at 0°F (-18°C). Kept frozen, it stays safe longer, but texture and flavour fade.
How do you thaw frozen onions?
Move it to the fridge the night before; this keeps texture best.
Can you refreeze onions?
Only if they were thawed in the fridge and have not been left out. Quality drops each time.
Does freezing kill bacteria in onions?
No. Freezing pauses bacteria; they become active again as the food thaws. Cook or reheat to a safe temperature.
Numbers on this page come from USDA FoodKeeper and FSIS guidance. Last verified November 2026. How we verify our data · Report a wrong number