I have rose bush that really needs taming. Normally I would just dead head after first flowering (flowering now) and get a second bloom end of summer. I'd really like to prune it back hard to about 3ft tall as it's currently got quite a few stems waving around about 9ft up! Will I kill it if I cut back hard after flowering in summer. I'd like to get it down to below first leaves. Not sure what type it is, vigorous, a modern hybrid I think.
Thanks.