I put in the darks using Shadow Green (Holbein). It took almost the whole tube of paint! Next, I used drafting tape to mask some of the stems, and masking fluid on some of the seed pods. These masks aren't just to keep the areas clean; the masks are really helping me keep track of the geography of this large painting. I'm painting pthalo blue in the darker area of the leaves and painting over it with green gold, sap green, and a green made of cobalt blue and aureolin.