Can I prune a climbing rose now to train bits that have grown since the last prune?

[Spr1nk13]

Did prune it when you’re supposed to but has gone bonkers since. It’s a Mary Delaney.

?

Bump. Just planted a climbing rose, also interested in the answer.

When did you prune it?

Just looked it up and it looks lovely.
It is quite a tall one.
My guess is that you pruned it a bit late.
I'd try to tie it in a bit to the structure and gently tidy any wayward stems.
I'm no expert though.

Depends how vigorous it is.

I think the natural mode of growth is : send out long unbranched shoots now, to get above the surrounding vegetation and into the sun. When they’re no longer supported by other vegetation and have clearly broken through, the branches bend, and this stimulates the production of side branches which bear flowers next year.

So I would tie in the branches that grow this year, in a sort of arch to stimulate the growth of flowering side branches.

Except if the thing’s already grown way beyond its intended bounds, in which case I will happily take out the long branches whenever they appear.

This is my personal mode of action. I have no idea whether it bears any resemblance to accepted practice

I tend to try to avoid pruning this time of year, unless a stem is really obviously in the way, and instead I just tie everything in by bending the stems either horizontally or downwards as I want to maximise the flowers. However, roses are generally pretty tough, so I can't imagine you'll do any damage by pruning now, you just won't have as many blooms. I tend to give climbing roses a really hard prune in late winter, much harder than you might think. This year I thought I might have actually overdone it as there was barely anything left, but they seems really happy for it now!