Answer: It is awfully late to plant something, but if your rose bush has been outside all along and is going dormant, I think I would plant is even though it is so late. Be sure to water it in well and mulch it to help reduce heaving and thawing. Alternatively I would sink the pot into the ground in a sheltered spot and hold it over winter that way rather than bringing it indoors. Then plant it in very early spring.
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