I agree with Jackie, it's too early to move them. Once it warms up and night time temps are consistently above freezing you can dig them out safely. Dig as big a root ball as you can handle and take off ALL of the garden soil from the roots. You can rinse the root ball under a hose to get it off. Try to save as many of the small white feeder roots as you can. Find the biggest pots you can (I always suggest plastic or resin ones, they're much lighter if you have to move them, and you will!) and put extra drainage holes in them. Fill them with good quality potting soil. You can not use top soil in pots. It's too heavy and the pots won't drain properly. Roses in pots usually require a little extra watering because they dry out quicker. They also need a little extra fertilizing because the nutrients wash out. In zone 7 it would be very iffy to try to keep them outside all winter unprotected. If you have a garage I would say store them in there. Just remember to water them at least once a month until you can get them back outside in the spring. If you have to winter them outside I would suggest putting them together against a sunny wall of your house and wrapping them with burlap and packing them with leaves. I do this for my rose pots here in zone 6 and it has worked very well.

This is great, noseometer, I’m excited for you! Personally, I think it depends on the variety - the vigor and mature size. If these AD are very well rooted, the roots filling the gallon cans, I would plant them right in the 22 in pots. By the end of the season, it should be a decent size. Even with a smaller variety like Sister Elizabeth, she was a small but well rooted 1 gallon plant and was a rounded 2 1/2 foot shrub by the end of the season and didn‘t look so odd. In the end, either option will likely be just fine. You’ll have to post pics of AD as he grows up!

I would go with the 10 gal pots. Osmocote plus is great to fertilize containers. I'm sure those other fertilizers would be fine too. Just follow directions. I think the Austins could all be self supporting and function on a balcony as a climber almost because they will grow tall in LA. Good luck! Water generously in LA.

A pot should be fine. A lot of us have had good success with potted roses. Good job saving Chigo Peace's