Organic Hemlock Reishi Mushroom Sawdust Spawn

$29.99

Get Ahead on Holiday Shopping!

Give the gift of growth this season and save automatically at checkout:

Save 10%

on orders $50 - $100

Save 15%

on orders $100 –$300

Save 20%

on orders over $300

No code needed – discounts apply automatically at checkout. Offer valid through November 17th.

In Stock. Ships in 2-5 business days.

Hemlock reishi or "hemlock varnish shelf" (Ganoderma tsugae) produces beautiful shelf-like fruiting bodies with a shiny brownish-orange varnish and white margin. In the spring, when the fresh growth is still white with no hint of pores or lacquered color showing, many growers collect the marshmallow-y fruiting bodies to eat as fresh mushrooms.

Many growers will allow their hemlock reishi to grow into large waxy caps, at which point they become too bitter to consume. At this stage, they are ideal for drying and making into medicinal powders, extracts, tinctures, and teas. Hemlock reishi can be difficult to cultivate and is recommended for advanced and enthusiast growers who have had some success growing other mushrooms.

Recommended use:

  • Hemlock reishi sawdust spawn is only recommended for use in log projects.
  • One bag of sawdust spawn will reliably inoculate 20 logs.

Hemlock Reishi log chart:

BEST WOOD SPECIES Hemlock
OTHER SUITABLE SPECIES None recommended
AVOID All other woods


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 growing mushrooms on logs and totems.

Inoculation

This species of reishi mushroom grows on hemlock. Reishi works best when fully colonized logs are buried underground. Reishi likes any of the three log methods and colonizes in 12-24 months. It prefers hemlock logs and fruits in the summer. After a 1-year colonization period above ground, Reishi logs may be buried under 2 inches of topsoil to mimic its natural method of production. Mushrooms will fruit from the logs and emerge from the soil.

Storing

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

Cooking

The fresh, soft growth of the "lip" of G. tsugae can be sautéed and prepared much like other edible mushrooms. However, the tough woody center is bitter. For this reason, we don’t recommend it for culinary use. However, it can be dried and made into teas or powders. It can also be extracted to make tinctures.

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.

FAQs

Sawdust & Plug Spawn FAQ

Mushroom Spawn FAQ

Log Cultivation FAQ

Related Articles

You might also like
Trio of Tools
Trio of Tools (+$99.99)

Drill bit, Angle grinder adapter & Thumb press tool

Thumb Press Tool
Thumb Press Tool (+$43.99)

Inoculate logs with sawdust

MycoStraw
MycoStraw (+$24.99)

Substrate for sawdust spawn

Opinel No. 8 Mushroom Knife
Opinel No. 8 Mushroom Knife (+$33.99)

Harvest precisely

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.

Reviews