The "canvas" for this one is an old piece of cardboard-like material that I gessoed dark gray. It is helpful to begin by changing the photo to black & white to see how my composition looks.
This painting went fast ... alla prima (literally in Italian it is "to the first") ... other definitions are "at first attempt" and, especially in painting it is a "wet-on-wet", or "direct painting" technique.
I think the painting has a couple of focal points, you could actually choose three ... those three larger Nasturtiums.
(To be totally honest, these were not the last flowers ... since we haven't had a frost yet, some are still blooming, especially the Nasturtiums!)