Water moderately, allowing the soil to dry slightly between waterings. Ensure good drainage to prevent waterlogged roots, especially during cooler months.

Reduce watering in winter when the plant is dormant to avoid root rot. Consistent moisture is key for healthy growth.

Prune lightly after flowering to shape the plant and remove any dead or crossing branches. This encourages bushier growth and maintains an attractive form.

Avoid heavy pruning, as Metrosideros angustifolia can be slow to recover from significant cuts.

Propagate from semi-hardwood cuttings taken in summer or autumn. Use a rooting hormone and keep cuttings in a warm, humid environment. Seed propagation is also possible but may result in variable offspring.

Patience is required for successful establishment.

Repot young plants annually in spring, moving to a slightly larger container. Mature plants can be repotted every 2-3 years or when root-bound. Use a well-draining potting mix.

Ensure the new pot has adequate drainage holes to prevent water accumulation.