Last year I posted a similar flower making post on using non-traditional tools to shape fabric flower petals. If you haven't read the post, I suggest that you take the opportunity to do so because I give references to resources that will show you how to assemble an artificial flower. Plus, some of the things shown in the fabric flower petal video will be of help to you if you are not familiar with making hand made flowers. Maybe somewhere down the road I'll make a live flower making video; I'm just not feeling it now, as my remaining aunt has been ill.
Anyway below is my video/slideshow showing the leather flower shaping process I used when making the red leather rose. Also following is a video wherein the edges of the flower petals were shaped; this is the method I used. Although the flowers in this video are made in silk fabric, the method of shaping the edges of the petals is the same. Finally, follow my flower making board on Pinterest; there is plenty of information there on flower making. Enjoy!!