Organic Chestnut Mushroom Sawdust Spawn

$29.99

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Chestnut (Pholiota adiposa) is a popular cultivated mushroom in Japan. It produces velvety, small-to-medium, delightfully speckled caps resembling the color of their namesake nut. When cooked, they have a woodsy aroma, a meaty heaviness, and a rich, nutty, mildly-sweet flavor. Chestnut mushrooms aren't too difficult to cultivate, but can pose some minor challenges with identification.

Chestnuts are not ideal for those unfamiliar with how to properly identify different mushrooms species or for first time cultivators. However, they can be quite rewarding to grow for those with some experience growing other mushroom species.

Recommended use:

  • Chestnut sawdust spawn can be used for log projects and/or container, and bucket projects.
  • Chestnut sawdust spawn must be combined with a substrate (like hardwood chips) or used in log inoculation in order to fruit.
  • If growing on logs, one bag of sawdust spawn will reliably inoculate 20 logs.

Chestnut log chart:

BEST WOOD SPECIES* Aspen, Beech, Birch, Cottonwood, Hophornbeam, Hard Maple, Oak, Sweetgum
OTHER SUITABLE SPECIES Alder, Ash, Basswood, Buckeye, Cherry, Elm, Hackberry, Hornbeam, Mulberry, Willow
AVOID Hemlock


Upon receiving your spawn:

Remove it from the shipping box as soon as possible. Then, unfold the top of the bag, making room for air space. It's also important to check and confirm that the filter patch is not obstructed. This will help the organism breathe and continue to thrive!

Tools you'll need

To grow on logs using sawdust spawn, you will need a Log Inoculation Tool, Log Sealing Wax, and Wax Daubers. 

For larger log projects you may also want to purchase an Angle Grinder Adapter and specialized 12mm drill bit.

Cultivation

Click here to download our pamphlet on outdoor mushroom cultivation using sawdust spawn. Be sure to use clean, untreated products when growing mushrooms outdoors.

Inoculation

Logs:

Chestnuts work well with the Stump and Log methods in maple and oak logs. After a 1-year colonization period above ground, Chestnut logs may be buried under 2 inches of top soil. Mushrooms fruit from logs and will emerge from the soil.

Outdoor beds:

Click here to learn how to grow in outdoor beds.

Containers:

Click here to learn how to grow in buckets and containers.

 

Storing

If you don’t plan to use your chestnut mushroom sawdust spawn right away, store in the refrigerator. Use within 6 months of receipt.

Cooking

"5 of the Best Chestnut Mushroom Recipes"

Once cultivated, the Chestnut mushroom has a full flavor that is evoked with thorough cooking. We recommend you use its rich, nutty flavor as a compliment to autumn soups. Chestnut mushrooms work best when sautéing and simmering, and are delicious in a variety of soups, stews, and casseroles.

CAUTION: Be careful to properly identify these mushrooms when harvesting and before consuming. Chestnuts have poisonous lookalikes, so make sure you are familiar with the deadly Galerina autumnalis.

Ingredients

All our spawn is made using organic cultures from our own culture bank. Our sawdust spawn is handmade from a blend of locally sourced, all-natural, organic, and non-GMO woods and supplements from farms and forests in New England and North America. 

Cautions & considerations

If you’re going to consume home-grown mushrooms, make sure to cook your fresh mushrooms thoroughly with heat. If it is your first time eating this species, it is best to start with a small amount to check for allergies, even if cooked.

CAUTION: Be careful to properly identify these mushrooms when harvesting and before consuming. Chestnuts have poisonous lookalikes, so make sure you are familiar with the deadly Galerina autumnalis.

FAQs

Sawdust & Plug Spawn FAQ

Mushroom Spawn FAQ

Log Cultivation FAQ

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Sawdust Spawn Frequently Asked Questions

Sawdust spawn is sterilized sawdust colonized with mushroom mycelium. It’s used to inoculate a growing substrate such as logs, wood chips, or outdoor garden beds to start mushroom growth.

It serves as the "seed" for your mushroom crop — transferring live, growing mycelium into your chosen growing medium.

Sawdust spawn is best for outdoor projects like logs, stumps, or garden beds and is slower to contaminate.
Grain spawn is ideal for indoor grows or bulk substrate inoculation because it colonizes faster but is more contamination-sensitive.

Sawdust spawn is mixed or packed into a substrate (like logs or wood chips) to inoculate it. Common methods include:

  • Drilling and filling holes in logs
  • Layering in outdoor wood chip or straw beds
  • Mixing with sterilized sawdust or wood pellets for bag cultivation

Most sawdust spawn performs best on hardwoods like oak, maple, or beech. Some species (like Wine Cap or certain Oysters) can tolerate small amounts of softwood in the mix.

Cluster of brown-capped mushrooms with long, light-colored stems against a white background.

Your Trusted Source for Premium Mushroom Growing Supplies

Whether you’re growing mushrooms at home, in your garden, or at a commercial scale, we offer everything you need to cultivate success. We start with the highest-quality OMRI-listed ingredients, mix them in our state-of-the-art facility, and inoculate them in our custom-built lab, so you can rest easy knowing your product will yield the best results.

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