Yes, you could transplant roses now. Prepare where you want the rose to be transplanted to making sure you dig the whole large enough and soak the prepared area with water beforehand. You must ensure when digging up the rose that the roots do not get cut off. Depending on the size of your rose bush it would be better to start by digging 18 - two feet from the main stem. If this area if too big then start cutting the size down. There is quite possible a long root going down so try not to break this off. Take as much soil as you can with the roots and place in your prepared hole. Make sure the rose is no higher above the ground than before, and possibly an inch or two lower. Water well, but do not fertilize.
Hilling the rose over the winter is also a good idea.
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