Draw the main bush shape as a loose, rounded outline
Add uneven bumps and curves around the edges
Sketch a few smaller clumps connected to the main shape
Vary the size of the leaf clusters
Add overlapping shapes to create depth
Draw short, irregular lines inside the bush for texture
Darken the lower areas and inner sections
Leave small gaps for highlights and light
Add a few thin stems or branches at the base if needed
Refine the outline so it looks natural and organic