Yes, plant now. In your zone you don't really get a period where they stop growing altogether and go completely dormant. Even into zone 7 fall is a good time to plant. They say my Michigan zone 6 is OK too but I've found from experience that roses planted in the fall here are more than likely to die over the winter. So I no longer do fall planting. It all depends on what your climate is like and your's is good for fall planting. The cool weather and extra rain are very conducive to good root development. Roses continue to grow, albeit slowly, in weather well into the 40s. Even here I've had blooms as late as Thanksgiving.
