[Insights] Those 3 paints of basic mix didn't mix together long, they would separate out. It meant I needed to stir it again soon before applying it on paper. You can even expect them to separate again on paper if the wash is really wet. However, I liked the "separated" effect especially when the granulating french ultramarine came out in this Magnolia illustration. The shadow tone looked rich and it lent the leathery effect of the petals, too.
In addition, I used white gouache for the fine hair of the buds. [Tips] I mixed white gouache with yellow watercolour, hence it blended nicely with the whole illustration. If not, the white gouache tended to look bluish.