They already are formed into sort of a cup shape. The way I started off all of the clusters of leaves was by taking a cube, tesselating it into a sphere, deleting all but the top 6-8 quads and then scaling those up after splitting them and deforming them. There are only about 8-10 clusters of leaves on the tree right now.
Great improvement on the rocks! I never understood what was so special about the polish brush though. I prefer TrimDynamic. Are those rocks under the lone red tree one big mesh, several stacked? Now it's time to put some vegetation on the ground! 8)