I have a rose climbing over an arch which is doing quite well. Last year I managed to train some of the longer stems over the top of the arch and now they are growing very vigorously. My problem is that there are many new side shoots which are shooting about 3 feet into the air at present. Will they grow longer, should I trim them back or just let them do their own thing. Your help would be appreciated. Have read the pruning hints in the current news letter but doesn't seem to answer my problem. Have very little experience with roses.