Rather than finish the bluebonnet, I have moved to the tiny hot pink sections of the Indian Paintbrush. Watercolor must be VERY dry before you paint some more right next to it, so I use an every-other-petal pattern when I paint wildflowers. This keeps the colors from mixing or from creating a "blossom" or "cauliflower" where one color drifts into the same color next to it. I also like this method, because as I continue to mix up small batches of color, they all come out a little different, so there is great serendipitous variety in the petals.
Texas Hill Country Art