I worked a little more on the petals and the shadows on the leaves.
I darkened the background (so now need to fix the edges of the ornaments), added more pine needles, and shaded the snow a bit more.
I started with a very light rose, ultramarine blue, and aureolin yellow. I worked upright and painted the colors from top to bottom concentrating on the skin and pulling colors out into the painting. I let that dry. I mixed a skin color (rose plus aureolin yellow) and started painting the shadows. I let drips and splatters happen and added more as desired.