Water Clerodendrum tomentosum regularly during the growing season, allowing the soil to dry slightly between waterings. Reduce watering in cooler months, but avoid letting the soil become completely dry.

Ensure good drainage to prevent waterlogged conditions, which can lead to root rot.

Prune Hairy Clerodendrum in late winter or early spring to shape the plant and encourage bushier growth. Remove any dead, damaged, or crossing branches.

This also helps to maintain a desirable size and can stimulate flowering for the upcoming season.

Propagate Clerodendrum tomentosum from semi-hardwood cuttings taken in summer. Root cuttings in a well-draining potting mix, keeping them consistently moist and in a warm, humid environment.

Alternatively, seeds can be sown in spring.

Repot young plants annually, and mature plants every 2-3 years, in spring before new growth begins. Use a good quality, well-draining potting mix.

Choose a pot that is only slightly larger than the current one to avoid over-potting.