Food expiry database
How Long Does Pesto Last in the Fridge
FoodKeeper lists jarred pesto at about 6 months after the package date in the refrigerator and about 3 days refrigerated after opening. It also lists about 1 month in the freezer.
This page is about what happens once the item is in the refrigerator or becomes leftovers, and which date is still worth trusting.
Quick storage guide
| Situation | How long it usually lasts | Storage | Safety or quality? |
|---|---|---|---|
| Unopened | 6 months after the package date | refrigerated jarred pesto | Quality |
| Opened | 3 days | refrigerated after opening | Quality |
| Refrigerated | 3 days after opening | Refrigerator | Quality |
| Frozen | 1 month | Freezer | Quality |
What the source actually supports
- Pesto: 6 months after the package date in refrigerated jarred pesto — FSIS FoodKeeper data.
- Pesto after opening: 3 days in refrigerated after opening — FSIS FoodKeeper data.
What the official refrigerated storage guidance means for pesto
FoodKeeper lists jarred pesto at about 6 months after the package date in the refrigerator and about 3 days refrigerated after opening. It also lists about 1 month in the freezer.
For pesto, the official window only makes sense when you pair it with how the item was actually stored, handled, and served at home. Warm exposure, repeated opening, contamination, and missing open dates can matter just as much as the printed date.
How to store pesto
Opened pesto should be treated like a refrigerator item you use in small bursts, not like a pantry sauce you can forget in the door. Keep it cold, close it tightly, and use a clean spoon each time.
If you make pasta, spread sandwiches, or use pesto as a dip, the jar may spend more time at room temperature than you realize. That should shorten your comfort level, even if the label still looks fine.
Signs pesto should be discarded or replaced
- Discard pesto if it smells off, shows obvious mold, or the jar looks compromised.
- Replace it sooner if it sat out during dinner or a grazing spread.
- If the open date is missing, do not keep guessing.
Calculate the date for your item
Choose the exact FoodKeeper product and storage condition, then calculate a range from the date it was opened, cooked, bought, or thawed.
When to set a reminder in ShelfDate
- Set an open-date reminder when the jar is first used.
- Add a second reminder before the refrigerated window ends.
- If you freeze extra pesto, set a separate reminder for the frozen portion.
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Common questions about pesto
For pesto, the most useful question is usually when it entered the refrigerator or became leftovers, not just what the label originally said.
Sources
- FSIS FoodKeeper data — USDA item-level storage data used for Pesto — jarred.
- Food Safety During Power Outage — FoodSafety.gov keep-or-discard backup guidance after unusual warm exposure.