I live in Pittsburgh,PA, and the Phipps Plant Conservatory is transplanting
two large trees sometime in the next week or so. I would say the trees are
at least fifty feet high. I was wondering if this was a good time to
transplant the trees. Also, is it better to transplant trees when they are
dormant, rather than when they have leaves on. Although the trees are only
being moved around fifty yards, it should be fun to watch.

Tom,
You might find this article of interest:
http://www.colostate.edu/Depts/CoopE...s/movetree.htm
sed5555