We have a number of large piles of rotted wood chips on our land from about five years old when we had to clear a few trees. They produced quite a few two years ago, then nothing last year with the dry fall in our area. We're happy to see them again.
Are those edible?
My friend, all fungi are edible, but some fungi are only edible once.
Oyster mushrooms (Pleurotus ostreatus). I picked and dried a bunch two years ago and we've been adding them to soups and sauces. We're still alive and well.
There's at least one way to find out...
Psilocybe cubensis are much more resilient than people give them credit for and are really easy to grow. UB tek is great if you don't want to mess around with pressure sterilization or anything like that.