I am now working on the flower shapes,  using French Ultramarine, Ultramarine Violet, Winsor Violet, Alizarin Crimson, Brown Madder and Cerulean Blue. The painting can present as an abstract of flower shapes, because it is the overall pattern of the flowers on the tree that I am trying to capture. In this way, the focus should not be on a particular flower but on the overall 'feel'.