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- Commercial | Organic Elm Oyster Grain Spawn
Commercial | Organic Elm Oyster Grain Spawn








Difficulty | Beginner |
Grow location | Indoor |
Spawn shelf life | 6 months (refrigerated) |
Flavor profile | Woody, earthy |
Certifications | USDA certified organic |
Weight | 6 lbs |
Elm Oyster (Pleurotus ostreatus) is a fast substrate colonizer that produces large dense mushroom clusters. They are light beige in color and have a subtle woody, earthy flavor. Elm oysters are reliable indoor year-round producers. If kept in the right conditions, they will yield substantial first, second, and even third harvests. They have a low spore load (which is great for cleanup) but do have a slightly shorter shelf life than other oyster mushrooms.
Elm oyster grain spawn can be used for indoor production using sawdust or straw or outdoor production using straw or wood chips.
Scroll down for descriptions of available strains.
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(Pleurotus ostreatus) Produces highly branched clusters of off-white/tan mushrooms that yield well in both cold and warm temperatures.
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Colonization Temps 55-65 degrees F Fruiting Temps 65-75 degrees F CO2 Sensitivity 500-1500 ppm -
Elm oyster mushroom grain spawn can be mixed into sterilized hardwood sawdust to create elm oyster 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 6 months.