How long does polenta last?
Polenta keeps for 5 to 7 days in the fridge once opened, until the date on the package in the pantry. Freezing polenta, shelf-stable, is not recommended; frozen keeps up to 12 months in the freezer. USDA lists 2 kinds of polenta; the first is shown here and all are in the table below.
shelf-stable
Use by the package date
5 to 7 days
after opening
Not recommended
All kinds of polenta, side by side
| Kind | Pantry | Fridge | After opening | Freezer |
|---|---|---|---|---|
| shelf-stable | Use by the package date | no guideline | 5 to 7 days | Not recommended |
| frozen | no guideline | no guideline | no guideline | 12 months |
No guideline: USDA gives no time for that place, usually because the food is not stored that way.
After thawing
- frozen: 5 days in the fridge once thawed.
How to tell polenta has gone bad
General signs for shelf stable foods, the group USDA lists polenta under.
- Crackers or cereal that have gone soft or stale, not crisp
- Rancid, paint-like smell from nuts, oils or nut butters
- Small insects or webbing inside a box or bag
- Spices that have lost their smell and colour
- Fermented or boozy smell from honey that has picked up moisture
More on shelf stable foods. 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 dry pantry staples in a cool, dry cupboard away from the stove and direct sunlight, ideally in airtight containers once opened. Reseal cracker and cereal bags tightly with a clip or transfer them to a container to keep them crisp. Label opened jars with the date so older ones get used first.
More in shelf stable foods
Source: USDA FSIS FoodKeeper dataset (public domain). Times assume a fridge at 40 F (4 C) and a freezer at 0 F (-18 C). How we decode the data.