 Okay, so don't trim it back, don't mess with it. Exactly. One thing you can do with climbing roses, if they get out of bounds and they start reaching out to grab you, if you cut them close to a sidewalk or something, or they get too big for the trellis, you can snip them back a little bit. Or if it has some dead, damaged branches after the winter, you can cut some of those out. But other than that, you're just going to let them go and try to keep them where they're on the trellis.