Your website suggests proper pruning of a smoke tree but fails to describe any proper method of pruning. I have a smoke tree that is eight foot tall but only a spread of 30 inches. Is there any pruning to make it spread as I've seen other trees? Thanks. Tim Engel
Certified GKH Gardening Expert
The information located under the Care section of this resource should help in your situation: https://pubs.ext.vt.edu/2901/2901-1068/2901-1068.html
Here is a link with pruning information.