Answer: Twelve feet is not unusual for this rose so perhaps you would be happier with a smaller plant, or perhaps you could train it horizontally so it is not so tall. I mention this because, unfortunately, if you prune it back constantly you will never see the full flower display. I would not prune it now because that would stimulate late season growth and make the plant less winter hardy as a result. Pruning is usually done in late winter or early spring. Some of the wildness can be controlled by cutting back the laterals (side branches) so each has just a few buds on it, as well as tipping the longer canes. Training them horizontally also seems to enhance flowering.
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