Store fresh mushrooms in a breathable paper bag on a shelf in your fridge, not the crisper drawer, where they'll keep for 7–10 days. Keep them unwashed until you’re ready to cook, brush away soil gently, and avoid plastic bags that trap moisture and cause decay.
Why the fridge matters for fresh mushrooms
Fresh mushrooms are mostly water. At room temperature, they lose moisture quickly and begin to deteriorate within a day or two. A fridge slows this process by lowering the metabolic rate of the fungal tissue, but it doesn’t stop it entirely. The challenge is managing humidity: too little, and they dry out; too much, and they rot. This is why storage method matters as much as temperature.
I’ve worked with restaurants across South London, and the ones that keep mushrooms longest understand that fresh gourmet mushrooms—whether oyster, shiitake, or lion’s mane—need gentle, considered conditions. When I run cultivation workshops or sell fresh stock at West Norwood Feast, I always advise buyers that storage begins the moment they leave the studio. The fridge is your ally, but only if you use it correctly.
What container should you use to store mushrooms?
A paper bag is the best choice for fridge storage. Paper is breathable: it allows excess moisture to escape without letting the mushrooms dry completely. A brown paper bag, a mushroom paper bag (if you have one), or even a paper towel loosely wrapped around the mushrooms will work. The goal is to create a microclimate that’s cool and slightly humid, but not wet.
Avoid plastic bags and sealed containers at all costs. Plastic traps condensation and creates a warm, damp environment perfect for mould and bacterial growth. Glass containers are better than plastic, but still not ideal unless you can leave the lid ajar. If you don’t have a paper bag, wrap your mushrooms loosely in damp kitchen paper, place them in a container without a lid, and set that on a fridge shelf. The kitchen paper should feel slightly damp to the touch, not soggy.
Where in the fridge should mushrooms go?
Place your paper bag on a shelf in the main body of the fridge, not in the crisper drawer. Crisper drawers are designed to maintain high humidity for vegetables like lettuce and broccoli—the opposite of what mushrooms need. Mushrooms prefer a drier, cooler zone. A shelf near the back of the fridge, away from the door, is ideal because the temperature is more stable and the air circulation is gentler.
Keep mushrooms away from ethylene-producing fruits such as apples, avocados, and tomatoes. These emit a gas that speeds ripening and decay in nearby produce. Separate them by at least one shelf, or store them in a different part of the fridge. Label your paper bag with the date you brought them home, and check them every couple of days. If any mushrooms show slime or smell sour, remove them immediately so they don’t contaminate the rest.
Should you wash mushrooms before storing them?
No. Don’t wash mushrooms before fridge storage. Water accelerates decay and creates the damp conditions that encourage mould. Instead, gently brush away soil and debris with a soft, dry cloth or a clean, dry mushroom brush. If you can’t remove stubborn dirt this way, use a barely damp cloth—not wet—and dry them thoroughly with kitchen paper before bagging them.
When you’re ready to cook, rinse or wipe your mushrooms briefly under cool running water or with a damp cloth. This is the moment to clean them, not weeks earlier. At the South London Mushroom Club, we emphasise this point because it’s one of the most common mistakes home cooks make. Unwashed mushrooms in the fridge will keep longer, taste better, and stay firmer than pre-washed ones.
How long will fresh mushrooms last in the fridge?
Most fresh mushrooms will keep well for 7–10 days in the fridge if stored correctly in a paper bag on a shelf. Delicate varieties like oyster mushrooms may soften slightly after 7 days but will still be usable. Firmer types like shiitake can hold their texture for closer to 10 days. Beyond this window, they begin to lose flavour and develop a slimy surface, even if they look acceptable.
The age of the mushrooms when you buy or harvest them affects their fridge life too. Mushrooms sold at farmers’ markets or picked fresh from a grower—like those I sell at West Norwood Feast—are often only a day or two old, giving you a wider window before decay. Supermarket mushrooms may already be 5–7 days old when you buy them, so you’ll need to use them sooner. Always ask your supplier how fresh the stock is, or grow your own with one of our grow kits if you want to control the entire timeline.
Signs your mushrooms are no longer fresh
A firm, dry surface with no discolouration is the hallmark of fresh mushrooms. As they age or spoil, watch for: a slimy or tacky surface (a sign of bacterial growth), dark spots or blemishes that grow larger each day, a sour or ammonia-like smell, and soft spots that collapse when pressed gently. If the mushroom cap is wrinkled or the stem is shrivelled, the mushroom is still safe to eat but has lost moisture and will be less pleasant. If you see fuzzy mould of any colour, discard the whole bag—mould spores can spread to nearby mushrooms in hours.
Trust your senses. Mushrooms are forgiving in the kitchen once you know what’s fresh and what isn’t. If you’re unsure, smell and gently feel. A fresh mushroom smells earthy and pleasant, even a little sweet depending on the variety. A spoiled mushroom smells distinctly off. I encourage anyone attending our foraging walks or cultivation workshops to handle mushrooms regularly so they develop confidence in assessing quality. This knowledge transfers directly to fridge storage and home cooking.