KeepsUntilSearchMy fridgeShelf Stable Foods · USDA FoodKeeper

How long does Polenta last in the fridge once opened?

2 kinds · each with its own window
Polenta, shelf-stable · Once opened · in the fridge
Use by5 days to 7 days
Counted from the day you opened it
USDA FoodKeeper figure · as published
How this date is worked out
From KeepsUntilIt is past the dateThe FDA and USDA FSIS rules, and where to ask when a date runs outWhere these numbers come fromThe USDA source, the parse rules and what this site cannot tell youEvery food on the siteOne page, every product, longest first

Turning the range into a date

Polenta (shelf-stable) keeps 5–7 days in the fridge once opened. Enter a day and each row becomes a calendar date, worked out in your browser.

Polenta, shelf-stable

  • Once opened · in the fridgeUse by5 days to 7 days after the day you opened it

Polenta, frozen

  • In the freezerBest quality by12 months after the day you stored it
  • Once thawed · in the fridgeUse by5 days after the day it finished thawing

Every storage figure the USDA publishes for this item

USDA FoodKeeper lists 2 kinds under Polenta.

Polenta, shelf-stable

  • In the freezernot recommended
  • In the pantryPackage use-by date
  • Once opened · in the fridge5 days to 7 days

Polenta, frozen

  • In the freezer12 months
  • Once thawed · in the fridge5 days

Other foods on the same USDA shelf

From KeepsUntilWhere these numbers come fromThe USDA source, the parse rules and what this site cannot tell you

Food safety rules that apply to every food

  • Keep the refrigerator temperature at or below 40° F (4° C). The freezer temperature should be 0° F (-18° C).
  • Never allow meat, poultry, seafood, eggs, or produce or other foods that require refrigeration to sit at room temperature for more than two hours—one hour if the air temperature is above 90° F.
  • Though food will be safe indefinitely at 0° F, quality will decrease the longer the food is in the freezer.
  • Never thaw food at room temperature, such as on the counter top. There are three safe ways to defrost food: in the refrigerator, in cold water, and in the microwave. Food thawed in cold water or in the microwave should be cooked immediately.
  • Perishable foods should never be thawed on the counter, or in hot water and must not be left at room temperature for more than two hours.
  • If you're not sure or if the food looks questionable, throw it out.

Sources: FDA: are you storing food safely · FDA: safe food handling · USDA FSIS: safe defrosting.

Where these numbers come from

Every figure and note on this page is reproduced from USDA FoodKeeper as published; the calendar date is the only arithmetic, and it runs in your browser.

Source: USDA FoodKeeper, retrieved 1 September 2026. A figure that does not match the source? Tell us. How the site is built.

The answer at the top is for Polenta, shelf-stable, the kind this site shows first; every kind the USDA lists under this name is printed with its own figures.

USDA index terms: frozen, frozen polenta, shelf stable, shelf stable polenta

KeepsUntil is an independent reference built on public USDA data. It is not affiliated with, endorsed by, or connected to the U.S. Department of Agriculture or the Food and Drug Administration. Storage times are reproduced from USDA FoodKeeper as published; when in doubt, follow the FDA and USDA FSIS guidance linked on every food page.

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