How Long Food Lasts

Shelf Stable Foods

How long does polenta last?

Quick answer

Polenta (shelf-stable, opened) keeps 5-7 days in the fridge.

  • Frozen 5 days in the fridge · 12 months in the freezer
  • Shelf-stable, opened 5-7 days in the fridge
Form

Fridge

After opening

5-7days

Freezer

Do not freeze

-

Pantry

No known time

-

Mine has been in the fridge for

How long does polenta last in the fridge?

  • Shelf-stable, opened5-7 daysAfter opening
  • Frozen5 daysAfter thawing

Your fridge should be set between 0 and 5°C.

Refrigerators should be set to maintain a temperature of 40 °F or below.

How long does polenta last in the freezer?

  • Frozen12 months

Freezer times are for quality; frozen food stays safe.

Your freezer should be around -18°C

A freezer acts as a pause button - food in a freezer won’t go bad and most bacteria cannot grow in it.

Food stored constantly at 0 °F will always be safe. Only the quality suffers with lengthy freezer storage.

Can you freeze polenta?

  • Shelf-stableNot recommended
  • Shelf-stable, openedNot recommended
  • FrozenYes

How to defrost polenta safely

  1. In the fridge
  2. In cold water, cook it straight after defrosting
  3. In the microwave, cook it straight after defrosting
  4. Cook it from frozen

You should defrost your food in the fridge so that it doesn’t get too warm

It’s also important to use food within 24 hours after it’s been fully defrosted

There are three safe ways to thaw food: in the refrigerator, in cold water, or in the microwave.

Check the water frequently to be sure it stays cold. Change the water every 30 minutes. After thawing, cook immediately.

It is safe to cook foods from the frozen state. The cooking will take approximately 50% longer than the recommended time for fully thawed or fresh meat and poultry.

Can polenta be kept out of the fridge?

  • Shelf-stableuse-by date on package

All forms at a glance

FormFridgeFreezerPantry
Shelf-stable--use-by date on package
Shelf-stable, opened5-7 days--
Frozen5 days12 months-

Frequently asked questions

How long does polenta last in the fridge?

Shelf-stable, opened: 5-7 days; Frozen: 5 days.

How long does polenta last in the freezer?

Frozen: 12 months. Freezer times are for quality; frozen food stays safe.

Sources

We always show the most cautious time among official sources. Last checked: 1 October 2026.