Can't help you with a name - but I've been growing them here in Dayton Ohio - which is on the border zone 5/6 - for years. Most years they are like a cutback shrub with the stems dieing during the winter and re-sprouting from the root system. Most years but not all. Need to have patience with them in the spring as they can be late sprouting. I never cut them back till late June most years. They do best in full sun, but will tolerate some shade which will have impact on the amount of blooms you get. We also have them in a local arboretum and deer have never bothered them - not saying the same will hold true for you.
Good Luck
Marshall

There are actually quite a few crapes that are supposed to have better than average cold hardiness. With the information provided, it would be just about anyone's guess as to the cultivar name. I would think that any even half-reputable nursery would be able to tell you what you were buying from them. If not, it sounds like they are just looking for a sucker to take something, they lost the tag for, off of their hands. If they don't know the cultivar, for sure, or don't have one heck of an explanation for not knowing, they just don't have a clue what they are doing.

As for proper care, just be sure to plant and mulch them properly (see link below), and consider finding a location that receives more sun.

Here is a link that might be useful: Planting a Tree or Shrub

Actually, brandon, I did find out the name: Velma's Royal Delight--the tag was way up inside the plant.

Also, mrgpag--you cut back in late June??? I thought these flowered Jul-Sep...am I missing something?

Thanks for the encouragement!

I have 3 which usually start blooming in August. I usually wait until I see the green leaf buds to know where to cut. Even with the harsh winter we had, my white one didn't need as much back cut off but its basically a tree at 7 ft. Now the fushua one I had to cut back until it was barely a couple of feet, none to happy about that. I also have a dwarf one which is more a low grow plant then anything else.