Funny running into this. I've on the border of zone 3/4 -40 F winter low.. I can see lake superior off my deck. High winds off the lake. Tomorrow is supposed to be 75 F ! Also two nights in the next week are forecasted to be 32 for a night low. My collected silver birch about 2 weeks ago needs minimal protection. I love it. Don't love that I have Japanese maple leafing out along side my amur maples. I scratch my head about Temps though. I feel like like high elevation leads to higher uv. It was almost 60 F in Duluth, MN today. I have to use a shade cloth. My north northeast side of the house gets 6 hours of sun. 48 trees in my yard, ether too much shade or too much sun. Every one has different extremes
