Hi,
I was wondering if anyone can help I'm growing blue oyster mushrooms indoors currently. They are fruiting well but caps remain closed and not flat. Can anyone explain why they remain closed?
Are your mushrooms getting enough fresh air? These organisms generate a lot of CO2 so fresh oxygen and proper humidity are important at the fruiting stage. If you can describe your culture conditions and post a picture that might help.
I got this tall by not having enough crisco in my diet as a kid. This ad looks like it had plenty of shortening:
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