• Weight: Approximately 6 lbs
• Hydration: Average of 47%
• Bags: Gusseted 2.2 mil polypropylene
• Filter: High efficiency .2 micron
• Inoculation Rates: 6 lb. bag of grain will inoculate between 120-165 lb. sterilized sawdust, and 100-130 lb. pasteurized straw
• Sterilization method: Commercial grade autoclave sterilized

• Primordia -  The earliest recognizable stage of fruitbody development. Also known as “baby mushrooms” or “mushroom pins.”
• Fruitbody - A fully grown mushroom, the reproductive structure of the organism in which the spores are produced.
• CO2 sensitivity - When CO2 levels are too high, yields will decrease, stems will become long and stringy, caps will be small, and/or growth will halt.

Reishi mushroom grain spawn can be mixed into sterilized hardwood sawdust to create reishi substrate blocks.

Note: Grain spawn must be mixed with bulk substrate before you can fruit it. If you are new to mushroom cultivation, we recommend purchasing a book on mushroom cultivation if you are interested in pursuing this style of mushroom production as a hobby or profession.

Recommended reading:

'Growing Gourmet and Medicinal Mushrooms' by Paul Stamets

If you don't plan to use immediately, you can refrigerate your spawn for up to 4 months.

Reishi is bitter with a tough texture. 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.

Our grain spawn is USDA certified organic and made using organic cultures from our own culture bank. It contains a blend of locally sourced, organic, and non-GMO grains and supplements from farms in New England and North America.

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.

Grain Spawn FAQ