How Long Mushrooms Stay Fresh in Your Refrigerator

Fresh mushrooms last three to ten days in the refrigerator, depending on how you store them and what type they are

The shelf life of mushrooms varies more than most people expect. Button mushrooms and cremini mushrooms typically last seven to ten days when stored correctly. Portobello mushrooms, which are larger and more porous, usually last three to five days. Delicate varieties like oyster or shiitake mushrooms fall somewhere in between—usually five to seven days. The difference comes down to moisture: mushrooms are mostly water, and they deteriorate quickly when that water either evaporates or gets trapped against their surface.

The moment mushrooms arrive home, they begin losing moisture and developing brown spots. You cannot stop this process, but you can slow it down significantly by understanding what mushrooms need in your refrigerator: air circulation, moderate humidity, and protection from pressure.

Key Takeaways

• Store mushrooms in a paper bag or open container in the refrigerator, never in a sealed plastic bag, because trapped moisture causes them to rot faster.
• Button and cremini mushrooms last seven to ten days; portobellos last three to five days; oyster and shiitake varieties last five to seven days.
• Do not wash mushrooms before storage—brush off visible dirt with a damp paper towel instead, and wash them only right before cooking.
• Mushrooms stored in the crisper drawer last longer than those on open shelves because the drawer maintains more consistent humidity without trapping moisture.
• Frozen mushrooms last up to eight months, but they become soft and are best used in cooked dishes rather than raw preparations.

Why paper bags work better than plastic for mushroom storage

Plastic bags create a humid microclimate that accelerates decay. When you seal mushrooms in plastic, condensation forms on the inside of the bag, and that moisture sits directly against the mushroom surface. This environment is perfect for mold and bacterial growth, which is why mushrooms stored in plastic often develop a slimy coating within two to three days.

Paper bags solve this problem because they allow air to circulate while still maintaining some humidity. The paper absorbs excess moisture without creating a sealed environment. If your mushrooms came in a plastic container from the store, transfer them to a paper bag or a shallow container lined with paper towels. Poke a few small holes in the bag if it is completely sealed. This simple step can add three to five days to your mushrooms' life.

The right refrigerator placement makes a measurable difference

The crisper drawer is the best location for mushrooms because it maintains a humidity level between 85 and 95 percent—high enough to prevent them from drying out, but with enough air circulation to prevent moisture from pooling. If your refrigerator has adjustable humidity controls, set the drawer to medium or high humidity. Mushrooms do not need the extreme moisture that leafy greens require, so avoid storing them in the same drawer as lettuce or spinach.

If you do not have a crisper drawer or yours is full, store mushrooms on a middle shelf in a paper bag. Avoid the top shelf, which tends to be warmer, and the bottom shelf, which can be too cold and may cause them to develop dark spots. Keep mushrooms away from the back wall of the refrigerator, where temperature fluctuations are greatest.

Cleaning mushrooms before storage shortens their life

Washing mushrooms before storage introduces water that has nowhere to go. The water sits on the surface and in the gills, creating conditions for mold growth. This is why pre-washed mushrooms from the grocery store often spoil faster than unwashed ones—they have already absorbed moisture during processing.

Instead, brush off visible dirt with a damp paper towel or soft cloth right before you put them away. If mushrooms are very dirty, use a dry cloth first, then a barely damp one. Save the actual washing for right before you cook them. This approach keeps them dry during storage and extends their life by several days.

Signs that mushrooms have gone bad and should not be eaten

Mushrooms are safe to eat until they show clear signs of decay. A few brown spots on the surface are normal and do not mean the mushroom is spoiled—you can simply trim them away. However, if you see sliminess, a strong ammonia smell, or visible mold (anything fuzzy or discolored beyond surface browning), discard the mushroom.

Mushrooms that feel mushy or collapse when you touch them have lost their cell structure and are past their prime. They may not make you sick, but they will have a poor texture and unpleasant flavor. If only one or two mushrooms in a batch have gone bad, remove them immediately so they do not spread mold spores to the others.

Freezing mushrooms extends storage to eight months

If you have mushrooms nearing the end of their life and you are not ready to cook them, freezing is a practical option. Slice them into uniform pieces, arrange them on a baking sheet, and freeze for two to three hours until solid. Then transfer them to a freezer bag or airtight container. This method prevents them from clumping together and makes it easy to grab just what you need.

Frozen mushrooms last up to eight months and work well in soups, stews, stir-fries, and sauces. They become soft when thawed, so they are not suitable for raw salads or dishes where texture matters. Do not thaw them before cooking—add them directly to hot liquid or a hot pan. The moisture they release during cooking will be absorbed by the dish rather than making it soggy.

Storage differences for specialty mushroom varieties

Delicate varieties like oyster, shiitake, and enoki mushrooms have thinner caps and more exposed gill surface, which means they lose moisture faster than button mushrooms. Store these in a paper bag in the crisper drawer and plan to use them within five to seven days. Enoki mushrooms, which are particularly fragile, should be used within three to four days.

Dried mushrooms, which have had most of their water removed during processing, last six months to a year in an airtight container at room temperature. They do not need refrigeration and actually stay fresher away from moisture. Store them in a cool, dark cupboard rather than in the refrigerator, where humidity can cause them to reabsorb moisture and develop mold.

Frequently Asked Questions

Can I store mushrooms in the same container they came in from the store?

If the container is a vented plastic clamshell with holes, you can leave them in it, but they will last longer if you transfer them to a paper bag. If the container is sealed plastic, transfer them immediately. The vents in store containers are designed for transport, not long-term storage, so they do not provide enough air circulation.

What should I do if mushrooms develop a white powdery coating?

A light white coating is usually just the natural spores that mushrooms release as they age—it is harmless and you can brush it off or wash it away before cooking. If the coating is thick, fuzzy, or accompanied by a musty smell, it is mold and the mushroom should be discarded.

Do mushrooms last longer if I store them in the freezer instead of the refrigerator?

Freezing stops decay entirely, so frozen mushrooms last eight months or longer. However, freezing changes their texture permanently—they become soft and are best used in cooked dishes. If you plan to use them within a week, the refrigerator is the better choice because it preserves their firm texture.

Is it safe to eat mushrooms that smell slightly off but look fine?

Trust your nose. A sour or ammonia smell means bacteria have begun breaking down the mushroom tissue, even if you cannot see visible mold yet. Discard them. A mild earthy smell is normal, but anything sharp or unpleasant is a sign they have spoiled.

Can I store raw and cooked mushrooms together?

Yes, but keep them in separate containers so bacteria from raw mushrooms do not transfer to cooked ones. Cooked mushrooms last three to five days in the refrigerator in an airtight container. Store them on a shelf rather than in the crisper, where excess moisture can accumulate.