I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
You can root roses in potting soil if you use rooting hormone. Placing the cuttings in water is not a good way to do it. The following web site gives info on how to root your roses:
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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