They might go dormant or just slow down. I have a bunch of roses in pots that I am planning to plant this year. Like you they are a combination of some I've bought and some that I had to dig up while there was construction was going on in my yard. When the temps dipped into the teens, I would bring them in the garage/basement. After the third time, I said, screw it, they are staying in there. So they were in there for a few weeks. Some of them started to put out growth, but it was pale yellowish green. But as soon as they went out into the sun, boom, they took off. Now I did have some sunlight coming in through windows, but not a lot. You could maybe put a plant light on a timer. But I would think this time of year keeping them outside would be preferable. But I think they would be ok in the garage. You will have to water them at least once a week.

You could probably pull if off. If you also could kept the garage door open for a few hours a day, it would probably help a lot. Does the garage door have the little windows above it? If so, it would let a little light in the rest of the day as well. When you move them back outside again in the desert sun with summer coming on, I would def keep them in the shade for a few weeks then transition them to full sun.

Another thought: If you have a little hand truck you could maybe rotate some of them out with some of the others on the patio. Make them take turns every 4 days or so. It would be more work but you could water them while they are outside that way too.

Unfortunately the patio is accessed via the condo, so moving back and forth from the garage to the patio will be a no go. The garage does not have windows but I could probably place some of the roses along the walls near the garage door and open the garage a couple of hours so the roses can be exposed to open shade or even some direct sunlight. Thank you for the suggestion! I just want my roses to survive this process. Fortunately it is only for 1 month or less.

What are the low temperatures??

You may be able to cover them at night with sleeping bags, blankets, etc.

Carol