The fridge just slows the mycelium down and LC's can last for a few years if taken care of. I just shot up the last of a Turkey Tail LC I had from early 2020 (possibly late 2019) and still viable and so you never know. In my overall experience growing all kinds of mush, edibles, exotics, whatever the case, 2 years is a common average before it's probably discard time. Your mileage may vary. No need to stir while in the fridge, you are GTG fungus friend and ready to fire at will.