18 degrees will surely freeze anything thats already come up-I've been shrooming for 40 yrs and have never seen this happen-yes I've found them in the snow-at 35 degrees-but this is way strange and sad
Gotta keep the hope! Season should barely be starting so I think there is plenty of time left for them to grow. Common' warm weather. I'm going out next weekend to check. Fingers crossed (20 some miles south of Indy)