Thanks to you both.
I'm Zone 5b/6a, with minimums of 0 F possible, but typically winter days run a freeze thaw cycle - low 25 F. high 35-40. Summers are hot and dry, 100s and 15% humidity possible, almost no rain mid June to October. Annual precip is 40 inches, though.
Looks like I will have to generate some microclimates, and work with the naturally occurring fungi that have survived here.