Thank you Magpie! It is exactly the advice I was looking for!

Do you all see the "related discussions" links to old interior DESIGN threads which have nothing whatever to do with roses, or this thread (I see them above, right below Yulias comment)? That sort of thing, and other Houzz stuff which is more obvious advertising, have been appearing at the end of legitimate threads for 2-3 weeks. I don't mind if they are put on the margins, but these are showing up in the middle of everything.

Meanwhile, back to the OP's question - I agree with Magpie - we moved a Belle Portugaise which was about 5 years old, and had been growing in a very large pot (15-20 gal) all of that time. We carefully lifted it out of its pot. without cutting it back at all (it was about 7-8 ft tall). The entire thing came out - same shape as the pot - all of the dirt and roots. We had a hole large enough to put it in like that, so we just dropped it in, covered the edges with some dirt, and watered it. None of even the new growth died, and it grew another 6 inches in the next week!

Jackie

P.S. Houzz just demanded that I "sign in" , and after I did, the offensive stuff disappeared - VERY weird!

Jackie

Agree with everyone but wanted to add one caveat: I would only transplant in summer if the rose had filled the pot with its roots, so the entire root ball would easily come out. If your rose is young and/or tiny relative to the pot, I’d wait for late autumn or spring. You want to avoid losing all the feeder roots if the rose comes out of the pot without its soil. That would cause the plant undue stress during the growing season.

I agree with you BenT. It is fairly easy to see if your rose has completely filled the pot - roots will be coming out of the bottom holes.

Jackie

Dig up and replant when top is not active (making new growth). Regarding planting from pots, being sure not to disturb the roots:

Microsoft Word - B&B #29 - fragile roots.doc (wsu.edu)

Thank you everyone!

I will check the roots. But if the roots are not well developed yet, then I guess I should leave the plants in their pots? Not sure if they will overwinter well in pots. I killed couple of plants that I attempted to overwinter that way.

You've still got time before you'd need to worry about weather killing your potted roses, if the roots need a few more weeks then try to wait. Have you taken a peek at the roots yet?

You could wait until late fall (before hard frost, but after most plants have actively stopped growing). At that point , if the rose has lost its feeder roots during transplant it has the winter to recover, and you could prune heavy in the spring so that the top is proportionate to the roots underground.

I think that I need to move Plum Perfect. It is just not happy and not getting enough sun.

I was thinking next spring but maybe Oct?

This is an information-seeking question from a gardener who has always lived in Zone 8: for cold climates, is it best to plant a potted rose in fall, thus exposing a plant that's not established to winter temperatures, or in spring? Or is there a sweet spot, for cold climates, getting the plant in the ground in September or October, late enough in the year that it's not roaring ahead making new growth, but with time to grow roots before serious cold starts?

Kristine, in your place I would move the plant in fall. October sounds reasonable. I plant in fall as much as possible, and never in spring. Our climate is similar to yours, but hotter in summer and with increasing drought. Plants need the winter months to grow roots before spring growth begins and drier summer conditions arrive.

I don't know how much the PNW climate has changed in the twenty-two years that have passed since I lived there.

Thanks Melissa, that makes sense doesnt it. I also have several roses to upgrade to larger pots. Maybe Oct would be a good window.

Kristine, I don't know the real best answer but I know that I'm going to try to move mine around October as well. I saw on another thread recently that a regular on the forum (just can't remember who at this moment) said to move them just as they're starting to go dormant, and that the move would shove them all the way into dormancy. I guess so that they have the whole winter and early spring to settle in the new soil and "rest" before being expected to grow and bloom again. It made sense to me so that's what I'm going to try.

That makes sense Magpie. I guess that we will find out

Thank you everyone! I checked my roses and they do have roots coming out of the bottom. I think I will also wait and move them in October.

Fingers crossed for the great October plant