Hi Lynn! Where do you Live? You can probably untie the canes from the trellis if you need to move the pot. Some roses don’t bounce back so well from being cut back. The rose you linked to is a once bloomer I believe, and may not flower if it’s cut back at the wrong time.

I agree with Dingo. Without knowing your location it's hard to give you an answer. That nursery is in Wisconsin. Do you live in WI or just ordering online from them? If you live there a potted rose on a rooftop will never survive a WI winter. Potted roses in cold climates need extensive measures in winter protection. Even planted in the ground, climbers need extra winterizing in cold climates if you want any cane length to survive the cold. However, in a warm climate you may well be able to do what you are proposing without any problem. Please let us know at least what zone you are in if nothing else.

Lynn, I think I have read that snow accumulation is actually better for the roses that freezing cold without snow. Something about the snow being an insulator? I'm not sure because I get the freezing wind with no snowcover so I didn't pay much attention to that topic.

jc.... yes, that could be entirely possible. But I also know (at least with Japanese maples) that heavy accumulations of snow on the branches can sometimes cause the branches to break. So for my maples, I'd have to go out and periodically shake off the new snow, to ensure there was not so much weight that some branches might break.

Let's start all over again. Most of what has been said already is specific to marginally hardy, heavily hybridized roses. It has nothing to do with a very hardy species rose. This is a legitimate zone 4 plant. Also, it will want to get big.

Setigera blooms on old canes. So don't expect much the year after you cut it back. I don't expect much trouble with snow breakage on one that has been kept in a pot. I also don't know how well I expect it to do in a pot. I've grown it from seed, but don't remember keeping them in a pot forever.

Thanks mad. I was getting confused and thinking that because this rose is a 'climber', that that meant it winds all around the trellis, like a morning glory might do... but now I understand that this rose simply uses the trellis for 'support', and that the stems don't 'sucker' around the trellis, or wind around it. So... I therefore won't have any need to cut back the stems, if I need to move the planter. I can simply remove any 'ties' that I may have used to help secure the stems to the trellis.

Either way, I do understand that this plant may need a pretty large planter in which to grow/expand.