The long stem roses that I fold are folded using the Kawasaki method. It only uses a single square sheet of paper. I know some other methods use several pieces of paper. But I like to sticking to one sheet if at all possible. And this Kawasaki rose looks gorgeous!
There are free tutorials for this origami rose and here are a couple that I think do a great job of showing you what you need to do.
The second video is one that I did. I didn’t have a sound proof area to retreat to, so there is some background noise . . .