How long does polenta last?
Short answer: Polenta (shelf-stable) keeps 5–7 days once opened in the fridge, doesn't freeze well and keeps until the use-by date in the pantry.
Storage chart
| Type | Pantry | Fridge | Freezer |
|---|---|---|---|
| shelf-stable | Until the package use-by date | 5–7 days (after opening) | Not recommended |
| frozen | — | 5 days (after thawing) | 12 months |
Fridge at 40°F (4°C) or colder, freezer at 0°F (−18°C). Freezer times are for best quality; food kept frozen stays safe indefinitely.
Keep it longer
Keep the fridge at 40°F (4°C) or colder and the freezer at 0°F (−18°C). Write the date on containers when you open or cook something.
Common questions
How long does polenta last in the fridge?
5–7 days once opened in the refrigerator at 40°F (4°C) or below, according to USDA FoodKeeper data.
Can you freeze polenta?
Freezing isn't recommended for polenta; the texture and quality suffer.
How long does polenta last at room temperature?
Until the package use-by date in a cool, dry pantry.
How can I tell if polenta has gone bad?
Throw it out if you see mold, a slimy texture, an off smell or an odd color. For anything perishable, go by the storage time rather than smell: bacteria that cause food poisoning don't usually change how food looks or smells.
More shelf stable foods
Source: USDA FoodKeeper data (USDA Food Safety and Inspection Service). Updated 2026-10-13. General information, not medical advice. When in doubt, throw it out.