A couple seasons ago I bought a compassion rose and then I had a different idea and didn't put it where I'd intended. So I basically parked it in the ground next to a trellis and let it go. I recently noticed it has sweet, lovely blooms, but it is basically just one cane that is marching up and hugging one side of the trellis. It's about to the top now (about 6 ft high), and I don't know where it goes from here --- on up into the air? Anyway - my question is: should I prune it's one cane in some way to get it to spread out? It has short little laterals off the one big, main cane.
As always,
Thanks!