HI, today I saw the most gorgeous rose trees. They were huge...about 3 feet in Diameterand 6 feet tall! I wanted to get them but wasn't sure how to take care of them in the winter. If I don't bring them inside, will they survive like normal hedge roses? Do I need to cut them down to soil level or only up to where the rose ball starts?

Roses are a lot hardier than you think. I've definitely seen zone 7 roses in my searches. You'll need to know which rose it is just in case you've come across something best suited to warmer climates. Try this website's database, https://garden.org/plants/grou...

I would assume a tree rose is not as hardy to your area as a bush rose of the same cultivar would be, but you'd certainly have a much better chance with them than I would here in Zone 4! Bringing them indoors would not be a good option.

I don't think I would cut it back at all until you were able to see which parts are still alive in spring. Whether it would be worth keeping would depend on where it is grafted, assuming it is grafted, and where it died back to, if it does. I'm not an expert on roses trained as trees (standards) so I don't know how they are usually produced.