How Long Do Mushrooms Last? Fridge, Freezer and Dried
Pick how you store your mushrooms and the day you put them away. The tool turns the best-quality window from extension sources into dates that start from that day. It also lists the signs that end storage early, and those signs always overrule the date.
Best quality
5 to 7 days
Fresh whole mushrooms at 40 F or below, in their intact pack or a paper bag
Plan to use it between Nov 4 and Nov 6, if they were sound when stored.
Colder keeps longer: 7 to 9 days at 32 to 34 F against 3 to 5 days at 36 F in commercial handling (UNH).
Check before you cook
| What you see | What to do |
|---|---|
| Firm flesh and a dry surface | Keep cold and use as planned |
| Slight wrinkles, dry edges or browning, flesh still firm | Use soon and trim damaged spots while cooking |
| Condensation inside the pack | Move sound mushrooms to a paper bag and check them |
| Slime all over, collapse, rot or a strong off smell | Discard. Rinsing or cooking does not rescue them |
| Any visible mold | Discard. Do not trim it off or sniff it |
How it works
Where the times come from
Fresh whole mushrooms keep their best quality for about five days to a week in the fridge. Utah State University Extension gives about five days and up to a week, and Oregon State recommends that you use them within a week. The tool adds that range to the day you stored them, so mushrooms put away on a Monday reach the end of their window by the following Monday at the latest.
Your fridge temperature moves that window more than the calendar does. University of New Hampshire Extension reports seven to nine days at 32 to 34 F under commercial handling, against three to five days at 36 F. The FDA puts mushrooms in a fridge at 40 F or below, so a fridge that runs warm brings the end of the window forward.
Frozen and dried mushrooms follow general preservation ranges, since none of our sources tested mushrooms on their own. Oregon State gives eight to twelve months for most frozen vegetables, and Preserve Smart gives six to twelve months for properly stored dried produce. Both ranges assume you steamed or sauteed them before freezing or dried them fully before sealing.
Pre-sliced packs get no day count here because none of our sources gives one for them. For those, follow the package date and the storage line printed beside it, and keep the pack cold from the store to your fridge. The fresh storage guide covers when to keep a pack sealed and when to move mushrooms into paper.
Your dates, worked through
- Utah State gives about 5 days and up to a week, and Oregon State says use within a week
- Stored Oct 30 + 5 to 7 days = Nov 4 to Nov 6
- Any slime, mold or rot ends storage early, whatever the date says.
Limits
What this tool cannot do
- Times describe best quality and guarantee nothing about safety.
- It cannot see how long the mushrooms spent between harvest and your fridge.
- Slime, mold or rot ends storage whatever the date says.
- It never extends a package date or a food-safety time, and it never tells you a wild mushroom is safe to eat.
Questions
Can I eat mushrooms that have turned slimy?
No. Pervasive slime, collapsing tissue, rot or strong off odors mean the mushrooms no longer match sound fresh produce, so they go in the bin. Rinsing or cooking them does not bring them back.
Can I cut mold off a mushroom?
No. USDA FSIS advises discarding moldy soft, high-moisture produce, because the mold can reach below the surface you can see. The same guidance tells you not to sniff it, so the moldy mushroom goes straight in the bin.
Do mushrooms keep better in a paper bag?
It depends on the pack. Utah State advises keeping an unopened retail pack as it is, and moving loose or opened mushrooms into porous paper so moisture can escape. If you see condensation inside a pack, move the sound mushrooms to a paper bag and check them again.
Sources6
- Utah State University Extension, Fruit and Vegetable Guide Series: Mushrooms About five days and up to a week for fresh mushrooms, original pack while intact, paper for loose or opened ones. As summarized in our fresh storage guide, checked 2026-10-20.
- Oregon State University Extension, Mushroom Basics Use fresh mushrooms within a week for best quality. As summarized in our fresh storage guide, checked 2026-10-20.
- University of New Hampshire Extension, Boosting the Quality and Safety of Specialty Mushrooms Seven to nine days at 32 to 34 F against three to five days at 36 F under optimum commercial handling. As summarized in our fresh storage guide, checked 2026-10-20.
- Oregon State University Extension, Freezing Fruits and Vegetables (PNW 214) Eight to twelve months as a general high-quality range for most frozen fruits and vegetables. As summarized in our freezing guide, checked 2026-10-20.
- Preserve Smart, Drying Mushrooms Six to twelve months for properly stored dried products. As summarized in our drying guide, checked 2026-10-20.
- USDA FSIS, Molds on Food: Are They Dangerous? Discard moldy soft, high-moisture produce rather than trimming or sniffing it. As summarized in our fresh storage guide, checked 2026-10-20.