I "planted" blue oyster and hen of the woods plugs in standing dead elms last spring. So far I have not seen any development. Two of those elms produced oyster mushrooms on their own last spring and into the summer (they were delicious) but once everything dried up and it got hot those stopped growing. I had hoped the recent rains and cooler temperatures would bring them back but it hasn't.I had planned on getting some oyster and shiitake plugs last yr, saved out some fresh oak logs but never got around to it. Had someone near me say red squirrels ate all theirs. Never gave a thought to critters eating them.
Hopefully there will be oysters and hens to harvest next spring.