@HorseloverFat I think this is a better place for the hardiness conversation . Don’t want my bro Cajun mad at me . Thanks for the complement but I’m no expert . Just think we sometimes don’t consider all the variables. And like others only learn from mistakes . As I said have not read Heresy . I’m interested as according to what people say here his opinions are somewhat controversial . I am and always was a fan of Nick Lenz also controversial in the early days . What I was getting at about hardiness is a lot more than winter involved . I think root temp in pots other than winter is heavily overlooked . Can be great for us northerners pot warns up faster and earlier in the spring . Then the ground . . My failures with hemlock in the past has lead me to thoughts on positives and negatives of summer pot temp .
This is further tangent-split by container material, and even more importantly; substrate composition.
Roots in "bonsai" pots with inorganic soil, experience temps at (or potentially, easily hotter in summer) around air temps.
Roots in plastic nursery containers, In inorganic soil have a buffer due to insulating properties as well as less heat retention on the container.
Not that one is BETTER than the other.. I just think it's important to know.
Discussion, shared knowledge and comparison of experience will make us all "experts"..... EVENTUALLY.
