How long does Onion last at room temperature?

Onion — pantry: 1–2 months. Exact evidence is still under review; follow the product label.

How do you know if Onion has gone bad?

Dark mould at the neck, soft brown spots; Strong rotten or sour smell; Mushy, slimy, or leaking layers. Normal smell and appearance do not prove safety. Never taste food to check safety; consider storage history and product instructions.

How long does cooked Onion last in the fridge?

Onion — refrigerator (after cooking): 1–2 weeks. Exact evidence is still under review; follow the product label.

How Long Does Onion Last?

Onion: 1–2 months in the pantry. These are listed storage intervals; check each card for exact evidence and conditions. Freezer intervals describe quality.

2 cited USDA/FDA/FSIS sources
Editorial review · Editorial record: June 2026

1–2 months

Evidence under review

This editorial interval has no verified exact source yet. Follow your product label.

Each card identifies whether its interval has an exact source or is still under review. A missing card means no interval is available for that state.
An absent after-opening entry must not be replaced with an unopened interval.

Discard onions that are soft, leaking, or mouldy at the centre. Cut onion should be kept chilled and used within a couple of weeks.

How to tell if it's gone bad

Normal appearance and smell do not prove food is safe. Disease-causing bacteria may be present without visible spoilage. Never taste food to test its safety; follow time, temperature and recall guidance. FDA — Storage Basics

Look:Dark mould at the neck, soft brown spots
Smell:Strong rotten or sour smell
Texture:Mushy, slimy, or leaking layers

When in doubt, throw it out. If Onion smells, looks, or feels off — discard it. Food poisoning is not worth the risk.

Storage tips

Store whole onions in a cool, dark, airy spot away from potatoes. Refrigerate cut onions in a sealed container so they do not flavour everything nearby.

Check your storage dates

Compare the elapsed time with the storage guidance. This cannot certify that food is safe.

FDA — Storage Basics / Freezer Facts

Common questions

How long does cooked Onion last in the fridge?: Onion — refrigerator (after cooking): 1–2 weeks. Exact evidence is still under review; follow the product label.

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