Boost your bottlebrush... encourage a flush of Autumn growth and flowers on your bottlebrush with a handful of fertiliser. Use a native-specific fertiliser, such as Neutrog’s Bush Tucker, which has been formulated to meet the specialised needs of all Australian native plants. After flowering, prune bottlebrushes back to just behind the spent flower heads. This prevents seed capsules from forming and helps maintain a compact, tidy shrub.