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    Grey Oyster Mushroom Liquid Culture Syringe

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    Enjoy growing your own Grey Oyster Mushroom at home with this liquid culture prepared in-house by our mycology team! This delicious mushroom thrives on hardwood substrate and is easy to grow, making it a great place to start growing your own gourmet mushrooms.
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    Grey Oyster (Pleurotus pulmonarius)

    The Oyster Mushroom, with its distinctive clusters of fan-shaped caps, thrives on the sides of dead or dying hardwood trees in nature. Our Grey Oyster mushroom is an excellent place to start with mushroom cultivation as it is easy to grow and has high yields at harvest with the capability to produce multiple flushes.

    This strain produces clusters of off-white fruits and exhibits excellent tolerance for a wide range of temperatures for year round cultivation on hardwood or straw substrates, producing around 1-2 Lbs of fresh mushrooms per 5 LB block in our grow trials.

    These mushrooms have a delicate texture and mild savory flavor, making them a popular choice in a variety of culinary dishes and a staple for our team! 

    About Our Cultures

    All RMS Liquid Cultures are prepared from early generation slants and plates from our culture bank. These cultures are then expanded into liquid culture using lab-quality inputs, ensuring a vigorous culture ready for further expansion or immediate use. 

    Each culture is hand packaged in a clean-air laboratory environment, batch tracked, and quality assured to ensure your culture is contaminant-free and ready to use. If you ever have any issues with our cultures or any questions, feel free to contact us and we can put you in touch with our in-house mycologist.

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    Our liquid cultures can be injected directly into a wood-based substrate bag with injection port, or into grain bags/jars for expansion and spawn-to-bulk transfers. 

    NOTE: Wood-loving species can be added to wood substrates without the need for a grain transfer - to get more mileage out of your culture, inoculate grain and add to your substrates in a still air box or flow hood at a  5-10% grain to substrate ratio. 

    Liquid Culture Instructions

    • PREPARE YOUR ENVIRONMENT:  Wash your hands and put on a pair of disposable gloves. Use a laminar flow hood or a still air box for best results. Thoroughly clean your workspace and gloves with 70% isopropyl alcohol. 
    • DISINFECT PACKAGING: Spray syringe and needle packaging thoroughly with 70% isopropyl alcohol. 
    • ASSEMBLE SYRINGE: Remove the cap from the liquid culture syringe and attach the needle, twisting to lock it in place. Leave the guard on the needle until you’re ready to inoculate. 
    • DISINFECT GRAIN JARS OR BAGS: Disinfect items to be inoculated with 70% isopropyl alcohol.
    • INOCULATE: Carefully remove the needle guard and inject the culture. For best results, use a new needle for each injection or flame sterilize between uses. 
    • For smaller grain jars, use 3-5mL of liquid culture per jar. 
    • For larger bags of grain or wood substrate (3 lbs+) use 10mL of liquid culture per bag. 


    Fruiting Preferences:

    Substrate: Fast Fruiting/Masters Mix, Straw

    Temperature: 65-75°F

    Humidity: 85-90%

    Fresh Air Exchange: High

    CO2 Tolerance: Low; 400-800 ppm

    NOTE: The growing instructions and predicted yields in our details and technical specifications are based on our observations and may vary based on your growing method and environment.