Posted: 15/08/2013 at 16:49
Rambling roses do not need pruning unless they have outgrown their position, in which case you can just cut off what you don't want. Cutting it back will stimulate more vigorous growth next year. It is also good to cut out some older stems from the base and thus stimulate the growth of strong new ones. They are supposed to be fanned out against a wall, though this is not always easy because they are often very throny and vigorous. There's no point in deadheading ramblers, because you won't get any more flowers and the hips can be quite nice and good for the birds.
I agree with angie4, personally, about climbing roses. If unpruned, they will get very leggy and will tend to flower at the top. The stems can get congested, too, and some will die or be very weak and need cutting out. Pruning stimulates both new and vigorous growth and better flowering. Bending and training young stems sideways stimulates more flowers. Apparently it is something to do with slowing the flow of sap.