Sunflower rug mid completion

I started this rug in the middle of the summer because I had a lot of extra yellow and orange fabric. I placed bees among the flowers as a little detail and homage to my dads beekeeping.
Now that the flowers are nearly completed, I can finally start to get to work on the background soon. I'm hoping to fill in the background with a bunch of different shades of blue green and some brown. i'm trying to make this rug look like a stand of  flowers that have been left up to their own devices. I know that if you plant a bunch of different kinds of sunflowers together the colors will eventually mix, and that is what I'm trying to recreate in this piece.