I don't know that much about clematis but I do know there are different pruning types. To make it easier on yourself I would stick with ones that like to be pruned down every year. It will make it much easier to prune your roses.

Silver Star Vinery has some nice info on planting and pruning. I ordered from her last year and got some really nice plants!

3 fine clematis. I've grown 2 but not Betty Corning, but they can all be pruned as group 3, which means over here in my climate I would cut down to about 1 foot above the ground, or even ground level, on Valentine's Day Feb 14th, that's the day to do it here weather permitting, or up to end Feb. 'Niobe' can be left as a group 2, which means light pruning only if you want, then it will flower earlier. I chop n change with this one, sometimes gr. 2 one year and 3 the next. It's a very long blooming clematis, I still have flowers on it now.

'Betty Corning' is the largest grower I think and can be quite rampant, It's also scented from what I gather about it.

As was said already, you want something from pruning group 3, otherwise when you prune your roses and remove dead canes in spring you'll be removing or damaging the clematis's previous year's growth which it would bloom from.

I'd advise using Type-2 clematis as rose neighbors, and Type-3 clematis as rose partners -- but be sure to pair the latter with respect to their sizes, making sure that the rose is the larger of the two.

:-)

~Christopher

Yes: when pairing climbing plants of any kind it is important that their respective sizes and vigor be well matched. If you are talking about planting these new clematis on existing rose bushes the latter will really need to be comparatively large, long-established examples in order for then to serve as hosts for the climbers. Otherwise if when you posted "with my roses" you meant nearby, as on a fence behind them or on, say, pyramids among the roses then you just have to be sure there is enough space between these shrubs and the new climbers for the latter to show well. And not grow onto the roses.

At least not enough to interfere with them too much.

Of course the involved flower colors should also be attractively coordinated.

I've only grown one. Am I really know about it besides the 3 pruning types is to keep the roots shaded ( in hot climates) and that moving the young ines set them back. I moved mine several times. It took it a while to settle in, then it followed the sleep, creep, leap rule.

Growing a clematis with a rose was an idea from a person who hated gardeners!!

The clematis has a HUGE root system which also likes fertilizers and water and so the rose will have to compete. When the clematis grows it will gently curl it's tendrils around anything it can such as new leaves, buds and flowers. In a short time you will hear the rose calling you to dig the @#*! out. Most modern clematis hybrids are larger than many roses and in time can overpower the beauty of the climber. For that few weeks everyone will ooh and aaw at your design, to me it isn't worth it. Better to plant the clematis alongside and just make sure it doesn't get attracted to the rose.

I agree with the above, but still go with what I said previously. To specify further, when I say to use Type-3 clematis to climb into a rose, the rose I'm envisioning is a rambler, not a "shrub", and certainly not a Hybrid Tea. If you want a clematis to scramble into something the size of, say, 'Abraham Darby' or 'Graham Thomas', look at some of the non-clinging herbaceous clematis -- which are also considered Type-3 with regards to pruning. Aim for the rose being about 50% bigger than the clematis if you want the latter to climb into the former. In late Winter or early Spring, the clematis would be cut back hard, and the rose pruned as usual. Then any of last year's clematis still on the rose can be pulled off after it's dried up.

The alternative is something like what I did against a length of stockade fence -- I planted three roses ('Bleu Magenta', 'Bubble Bath', and 'Purple Skyliner') to climb against it, using three horizontal stretches of bungee cord for tying it in. Behind the cord is black plastic mesh "bird netting" which the Type-2 clematis use for support. The series goes clematis -- rose -- clematis -- clematis -- rose -- clematis -- clematis -- rose -- clematis -- clematis. There is some overlap near the top of the fence, but in Spring, I cut the clematis back so that it just barely -- if at all -- is actually on the roses. And the roses are also cut back to fit against the fence. The clematis bloom first, then the roses, with some overlap. After the roses are finished, I cut them and the clematis back just to neaten up. 'Bubble Bath', 'Purple Skyliner', and the clematis will bloom again in lighter flushes, but never as heavy as the first round.

:-)

~Christopher

For me , clematis stay quite compact in Texas heat, so perhaps the Clem overpowering the rose would not be as great a problem for KingCobb and me as it is for others with milder summers. (I’ve only been planting them together for 2 seasons, so I don’t know long term). I will say I don’t see giant masses of clematis here in TX as I see in the east coast or pacific NW. I don’t see them used very much at all here.

Venosa Violacea is a good choice for hot summers, it’s a good performer for me and I find the ‘stars at night’ effect especially attractive.

Here, my Betty Corning in her third year and pruned to 6 inches every year grows over 8 feet tall, so if you plant with a rose, keep that in mind. I remember a blogger who called her "Betty the Beast" http://adeinafrica.blogspot.com/2016/06/the-truth-about-clematis-corning_9.html. That being said, I have her planted with a couple of Marie Pavie, which is a fairly small rose, but Marie grows at the base and shades the roots. Betty is fragrant, but the kind of fragrance you have to stick your nose into to detect. I love my Betty, the flowers are so cute.

Thanks everyone. I have an 8 ft fence that has Climbin Lady Hillingdon, Collete, and soon a papi delbard growing along it. I may or may not put the betty corning with the roses. We have an ornamental 3ft wood fence on front of our house thay I have played with the idea of trelissing something on it.