I live in riverton wy. There is one black walnut in town that is amazing. I have seen a few that struggle to survive. As for fruittrees, the successful trees are in extremely sheltered areas. I have planted a lot of expirement trees at my place. I need to build up my soul more. I planted apples and plumbs 5 years ago. They are still alive but they haven't grown any taller at all. They are getting thicker every year but they are still 3 foot tall. I have planted hazelnuts and a bunch of other things but they die and start new from the bottom. Chockecherries are growing like crazy so that's what I am planning for my wind break around my orchard.