Do you mean Rose EO? Because at $300 an ounce I don't think I will be soaping that.
If you mean FO, then yes. I make a soap with Fresh Cut Roses (WSP) at .7 ppo., or roughly 3%. It moves very fast. I soap that one on the cold side, add the fragrance to the oils before they lye, along with a little Pink French Clay. It comes out very nice, and the scent holds well and strong.
The oldest bar of rose soap I have is more than 2 years, still a nice but faint scent. I'm not wild about the color, I tried rosehip powder.