Has anyone had experience transplanting a buddleia Davidii. Mine is about 7 years old and grows to 10' every year. I cut it back to 3' tall during the winter. The trunk is about 1 3/4 to 2" diameter. It stays evergreen but it appears to be fairly dormant right now however new shoots are showing up. If it can be transplanted how big should I expect the roots to be? What is the success rate like? Thanks for the help.