If you have a tall enough ladder, Cheryl!
I have never grown them in trees - sure death here in NE MS with our numerous freezes. I see no problem moving them from their tree perches though. Roots may have grown into the crevasses of the bark and you would have to tease them out. I mount a lot of my small orchid varieties on numerous types of wood (another experiment) and most are hanging in the limbs of my oak trees and will do so until fall. Of course, I simply move the mounted plants back into my orchid greenhouse to over-winter. Ken
