'Princeton' American elm (Ulmus americana 'Princeton') and the American sycamore (Platanus occidentalis) - where to purchase in Pennsylvania?
Answer
If you cannot locate 'Princeton' American Elm or American sycamore trees at local nurseries, you can readily find them with a google search. If you purchase them through the Internet, they will probably be bare rooted stock which should be ordered in late winter or early spring when they are dormant. THey nay be smaller than you prefer, but experience has shown that smaller trees transplant better than larger trees and grow much faster at first.