Bottlebrush grows best in a sunny, sheltered spot with free-draining soil—ideally sandy or loamy. Avoid heavy, waterlogged soils, especially in winter. When planting, incorporate grit or sand to improve drainage, and position the plant where it will be protected from cold winds and frost pocket pockets. In colder areas, consider growing in a large container that can be moved under cover during winter.

Tip prune young plants regularly to encourage a bushier shape. Once established, prune immediately after flowering by cutting back spent flowered stems to strong, outward-facing shoots. Older plants can be rejuvenated gradually over two or three years by removing some of the oldest stems down to a low bud. Protect during cold spells, especially from frost and excessively wet winter conditions. Mulching with bark or gravel around the base helps conserve moisture and insulate roots.