Water Acanthospermum australe regularly, allowing the soil to dry slightly between waterings. Ensure good drainage to prevent waterlogging, which can lead to root rot.

Reduce watering frequency during cooler months when the plant's growth slows down.

Prune Acanthospermum australe to maintain its shape and encourage bushier growth. Pinch back the tips of young plants to promote branching. Remove spent flowers to prevent self-seeding and prolong blooming.

Prune lightly in late winter or early spring.

Acanthospermum australe is easily propagated from seeds sown directly in the garden after the last frost or started indoors a few weeks prior. Cuttings can also be taken from healthy plants and rooted in moist soil or water.

Repot Acanthospermum australe when it becomes root-bound, typically every 1-2 years. Choose a pot that is slightly larger than the current one and ensure it has adequate drainage holes. Use a well-draining potting mix.