Answer: I would venture that your rose is a vigorous one and that the sprouts are a result of the stored energy within the canes. Even if a cutting from a hybrid rose were to root, it's not likely that the resulting rose bush will be hardy enough to grow for very long. Hybrid roses are almost always grafted onto a really vigorous rootstock, to help them survive the challenges of winter weather. Since you've already rooted a new rose, enjoy it, but don't spend invest too much time, or hope, in this project -- the results may be disappointing.
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