How the heck do people keep their climbing roses "flat" against a wall? Mine just grow in every direction
I've been asking for pruning advice every time I post on here or r/roses but nobody actually ever gives advice to keep these under control lol. The last 2 pictures is my attempt to just trim them like bushes with a hedge trimmer, basically cutting off all the straggling vines back to the base of the plant so it can fill out more like a bush and I can eventually give it shape (Either rectangular column or sphere I'm thinking).
After I did a HEAVY trim all the way back to the trellis in October, the plants looked pretty ugly since all the growth underneath wasn't receiving anymore sunlight, so it looked "bald" and you could see most of the trellis underneath. But luckily they bounced back quick and sent out a lot of offshoots at the bottom, so I'm zigzagging them back up to the top so it can fill in the bottom again. Except this time, instead of just letting it vine out like crazy, I'm trying to trim it about once a month to give it a better shape, otherwise, I'll just end up with a huge viney mess as you can see in picture 2 where the two plants almost touch each other.
I even asked my local "Master Gardener" from my extension office on how I should trim these, but they just told me they're supposed to grow big (like 15x15 feet tall/wide), and that I might have not chosen the correct plants for this location since they need more space.
BUT! All the pictures I see of Peggy Martin climbing roses people have them stay nice and compact, hugging their house exterior or fences, not nearly as tall/wide as mine get, so I'm confused on what to do. He mentioned the flowers mostly come for "new wood", so the long vines that form, and that trimming them back once a month will reduce the amount of flowers I get in the spring. But this is the only way I can think of how people manage to keep climbing roses "flat" against a wall, isn't it?
Can anyone chime in on how they do it?