Somebody said they use a digging and water jet combination to get the roots out with minimal damage. Sounds messy but maybe a little shot of water would help soften the dirt and kind of give an idea of the size of the root ball. I really want to move two of mine but one is really expensive (Lemon Chiffon) and the other is Border Charm. BC is simply too big for where it is located and I want to totally redo that bed.
