When we bought our house, the previous owners had a bush planted in the front yard that was from southern family, so it had sentimental value for them. This bush grows like a weed everywhere in Tennessee, but it wasn't really supposed to survive in Zone 6. It grew very slowly and only bloomed for about 4-6 weeks each year in September/early October. The wife told us that she usually cut it back and covered the roots each fall to protect them from snow and frost.
We never bothered to do any of that and the bush did just fine. If anything, on our watch it grew and actually started choking out the bed it was planted in. This past year, we asked them to come dig it out if they still wanted it, because we wanted to remove the bed. We walked outside around 10am one Saturday morning to a giant hole in the yard where the bush used to be, lol. The husband is kind of a toolbag who rinky dink DIY'd and brute forced a lot of stuff in this house, so it's for the best that we didn't get a chance to chat.