The shadow section is now almost complete. There will be some more dark 'peeping in' on the extreme left of the painting, but the top two flower ends will be in sunlight and, therefore, will be relatively pale. I am considering adding some blurry green shapes in the sky background on the left  to break up the vast expanse of the same colour. If I want to have a shape stand out I tend to leave it a little 'hard edged' ( not so much that it appears ' stuck on!) but otherwise I blend the edges of the shapes with clean water to make them look more natural.