|Help! We have several large planted beds(annuals,pennenials, etc) on our lawn. They are (recently) heavily mulched with hi quality mulch obtained from a nursery. Overnight, every night, literally dozens and dozens of mushrooms pop out. Big ones - some six to 8" in diameter and 8-10" high. I assume they are not edible. I pull them out every morning and dispose of them. The roots are very shallow- almost on the surface. Is there something I can do now to get rid of them permanently? Doesn't seem to matter if it's wet or dry. They came up when nothing else did during the drought.