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Commercial | Organic Shiitake Grain Spawn








Skill level | Intermediate |
Grow location | Indoors |
Spawn shelf life | 4 months (refrigerated) |
Flavor profile | Savory, buttery, umami |
Certifications | USDA certified organic |
Bag weight | 6 lbs |
Shiitake (Lentinula edodes) is a nutritious mushroom that produces medium-to-large, brown, umbrella-shaped caps that tend to fruit throughout the summer to fall growing season. They are a delicious edible fungus from East Asia and their flavor is often described as rich, savory, buttery, and umami. Shiitake tends to produce generous flushes and they are a great mushroom for beginners. They colonize quickly and are the most reliable producers of any species. They are also ideal for commercial cultivation.
Shiitake grain spawn can be used for indoor production using sawdust or straw.
Scroll down for descriptions of available strains.
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Lentinula edodes. Our favorite commercial strain for indoor shiitake block production. This strain fruits best at colder temperatures and tends to produce mushrooms with large caps and smaller stems. Our culture is direct from Belgium and retains the highly desired characteristics of this strain. Yield averages are .75-1.5 lb first flush off of 5 lb supplemented sawdust blocks.
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Lentinula edodes. A variation on commercial indoor shiitake genetics. We've had similar results from this strain as from our '207' strain listed above. We like having multiple varieties of the same species to ensure genetic diversity and reduce the odds of crop failure.
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Lentinula edodes. Fast spawn run, heavy first flushes, and quick log recovery after fruiting.
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Colonization Temps 70-80 degrees F Fruiting Temps 50-70 degrees F CO2 Sensitivity <1000 ppm
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Shiitake mushroom grain spawn can be mixed into sterilized hardwood sawdust to create shiitake substrate blocks.
Note: Grain spawn must be mixed with bulk substrate before you can fruit it. If you are new to growing mushrooms, we recommend purchasing a book on mushroom cultivation.
Recommended reading:
'Growing Gourmet and Medicinal Mushrooms' by Paul Stamets
'Organic Mushroom Farming and Mycoremediation' by Tradd Cotter
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If you don't plan to use immediately, you can refrigerate your spawn for up to 4 months.