Six years ago a squirrel planted a sweet chestnut seed in my plant nursery and forgot about it. The tree grew, and grew and grew. Today I harvested the first nuts from that tree (and roasted them for dinner, mmm yum). While harvesting the nuts I noticed a few puffball mushrooms growing on the soil scattered around the tree. I didn’t think anything about them, other than they were some of the first mushrooms I’d seen since establishing the perennial nursery many years ago. Later that day I reconsidered what I had seen, because…