Answer: Sounds as though you've got vigorous growth from the rootstock of your rose. It's not necessarily a bad thing, but it's probably not what the patented rose is supposed to look like. If you like it, you can treat it like a new cane and cut it back to about 18 inches. From there it will branch out and produce two new canes next growing season. It may out-compete the rest of the rose bush, so you'll eventually have to decide whether to discard the other canes, or cut this one off. Gardening is always such an interesting hobby!
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