How to Ship Mushrooms: Fresh and Dried Varieties

To ship fresh mushrooms, chill them to about 32–34°F, pack them in a single layer in a tray or paper bag with a perforated overwrap, set that inside an insulated box with gel packs that don’t touch the caps, and send it overnight or 2-day early in the week. Dried mushrooms are far easier: seal them airtight with a desiccant, cushion them, and ship by any standard service.

The difference comes down to moisture. Fresh mushrooms keep breathing and releasing water, so they need cold, humidity and airflow at the same time, while dried mushrooms only need to be kept away from humidity. If you’re new to perishables, our guide to how to ship produce covers the basics that apply to every fresh crop.

Which mushrooms can you ship?

You can ship culinary and gourmet mushrooms, such as button, cremini, portobello, shiitake, oyster, lion’s mane, maitake, morel and chanterelle, fresh or dried, along with cultivation supplies for those species. USPS accepts them as perishable matter at the mailer’s own risk, provided they are packaged as required and can be delivered before they spoil.

Psilocybin (“magic”) mushrooms are a Schedule I controlled substance under federal law, and mailing them is a crime, not a gray area. This guide covers edible varieties only. If you sell mushrooms commercially, food safety and labeling rules also apply, so check with your state’s agriculture or health department before you start shipping to customers.

How do you package fresh mushrooms for shipping?

Package fresh mushrooms so they stay cold and humid but can still release moisture. USDA Agriculture Handbook 66 says mushrooms keep 7–9 days when cooled quickly and held at 32–34°F with 95% relative humidity, and that commercial packers use trays or cartons with a perforated polyethylene overwrap to cut moisture loss.

1. Pre-chill the mushrooms. Refrigerate them before packing. Coolant only maintains a temperature; it can’t bring warm mushrooms down in time.
2. Use a breathable inner pack. Lay mushrooms in a single layer in a tray with perforated plastic wrap, or in a paper bag. A sealed plastic bag traps condensation and turns them slimy within a day.
3. Don’t wash them. Brush off soil and leave them dry. USPS treats fresh produce as mailable only when it is presented in a dry condition.
4. Insulate and add gel packs. Put the inner pack in a foam cooler or insulated liner, with frozen gel packs above it and a sheet of cardboard between them so the caps don’t freeze.
5. Box, seal and mark. Set the cooler in a corrugated outer box, fill gaps so nothing shifts, tape the seams and mark it “Perishable” and “Keep Refrigerated.”

Delicate species such as oyster and lion’s mane bruise easily, so give them more room and avoid stacking. Denser mushrooms like shiitake and portobello tolerate two layers with paper between them.

How do you ship dried mushrooms?

Dried mushrooms are shelf-stable and light, so the job is to keep moisture out and stop them crumbling. Seal them in an airtight jar, a heat-sealed bag or a zip-top bag with a food-safe desiccant packet, then cushion that in a small box with paper or bubble wrap.

Make sure the mushrooms are fully dry before packing, since any leftover moisture can grow mold in a sealed bag. Because dried mushrooms aren’t perishable in the same way, they don’t need coolant or expedited shipping; USPS Ground Advantage or UPS Ground is usually enough.

What are the best shipping services for fresh mushrooms?

UPS Next Day Air and USPS Priority Mail Express are the best choices for fresh mushrooms, because mushrooms lose quality within a few days even when chilled. Priority Mail or UPS 2nd Day Air can work for sturdy varieties in cool weather with good insulation.

Neither USPS nor UPS refrigerates parcels, and both accept perishables at the shipper’s risk. USPS adds a Live Animal and Perishable Handling Fee to perishable items sent by Priority Mail Express, Priority Mail or Ground Advantage, so declare the contents accurately.

How do you ship mushrooms in hot or cold weather?

In hot weather, use a thicker foam cooler, add more gel packs, ship only on Monday or Tuesday by overnight service, and ask the recipient to bring the box in as soon as it arrives. USDA notes that even 36°F shortens mushroom storage life to 3–5 days, so a warm truck or doorstep does damage fast.

Cold weather is kinder, but a hard freeze will ruin delicate caps. In winter, keep the insulation and use fewer gel packs so the box doesn’t drop below freezing. If you also ship frozen products, our guide to how to ship frozen food covers dry ice, which fresh mushrooms should never touch.

Whatever the season, don’t ship on Thursday or Friday. A box that sits in a facility over the weekend will usually arrive spoiled, however well it was packed.

How can you ship mushrooms for less?

Overnight and 2-day services are the main cost of shipping fresh mushrooms, so a discounted label makes the biggest difference. ParcelPath is free to use and gives growers and home shippers up to 89% off USPS and up to 85% off UPS, with no subscription or per-label fee. Enter the packed weight and box size, including the cooler and gel packs, in the ParcelPath rate calculator to compare overnight and 2-day options.

Small farms can cut costs further by shipping dried product, which is lighter and goes by ground. Our guide to saving on shipping for a small business covers box sizing and other ways to lower per-order costs. For cultures and other living foods, the same early-week timing applies as in our guide to how to ship sourdough starter.

Frequently Asked Questions

Can you ship mushrooms through USPS?

Yes. USPS accepts edible mushrooms as perishable matter at the mailer’s own risk. Ship fresh mushrooms dry, chilled and insulated by Priority Mail Express, which has a 1–3 day delivery commitment, and send dried mushrooms by Priority Mail or Ground Advantage. USPS adds a perishable handling fee to perishable items.

How long do fresh mushrooms last in shipping?

Mushrooms cooled quickly and held at 32–34°F with 95% humidity keep 7–9 days, according to USDA Agriculture Handbook 66, but at 36°F that drops to 3–5 days. A parcel rarely holds those conditions perfectly, so plan for overnight or 2-day delivery and ship early in the week.

How do you keep mushrooms from getting slimy in the mail?

Let them breathe. Pack fresh mushrooms in a paper bag or a tray with perforated plastic wrap rather than a sealed bag, keep them unwashed and dry, and separate gel packs from the caps with cardboard. Trapped condensation is what turns mushrooms slimy, often within a single day in transit.

Do you need a permit to ship mushrooms?

No federal permit is needed to ship culinary mushrooms within the United States for personal use. Businesses selling mushrooms as food must follow food safety and labeling rules and any state requirements. Psilocybin mushrooms are a Schedule I controlled substance under federal law and cannot legally be shipped at all.

Sources

• USDA ARS Agriculture Handbook 66: The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks (Mushroom)
• USPS Publication 52, 511: Perishable Matter, General Definitions
• USPS Publication 52, 53: Fresh Foods and Other Perishables
• USPS Publication 52, 513: Live and Perishable Handling Fee
• USPS: Mail and Shipping Services
• UPS: How To Ship Food

Mushrooms belong to our wider guide to shipping perishables and food, which links every food guide on the site.

Part of our How to Ship Produce guide. Related: How to Ship Fruit to Another State, How to Mail Fruit, How to Ship Frozen Food.