Posted: 11/04/2016 at 17:39
Group 2s don't need much pruning - generally a little tidy up after the first flush of flowers and you should get another flush again in late summer.
If it's a montana, you don't need to prune at all unless it's outgrowing it's space. You can prune to suit, but bear in mind that if you prune it right back it will take a while to come back to a decent size and you'll lose a flowering period along the way. They're 'designed'[ to be big and sprawling to cover arbours, sheds, pergolas etc, as opposed to growing up against a fence or wall, or an obelisk.
If the flowers are quite small it's more likely to be a montana.