Hi Bandmom,
You don't say where you live, but since it's getting colder where I am and you just transplanted them, I would suggest you wait until early spring before you prune them.* Give them time to let their roots establish.* I would suggest you prune them by one third to one half and remove all the flower buds the first year to help them get established.* You should find this helpful.* At this first site you can click on the plant sketch at the bottom and keep clicking on the plant in the pop up box to see how to prune.
http://www.gardengatemagazine.com/extras/51hedges.php
http://oldfashionedliving.com/roseofsharon.html
http://www.arborday.org/treeguide/TreeDetail.cfm?ID=170
Newt
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.