Tibouchina aegopogon prefers consistently moist soil but dislikes waterlogging. Water thoroughly when the top 2-3 cm of soil feels dry. Reduce watering slightly during cooler months to prevent root rot.

Ensure good drainage in pots and garden beds.

Prune Tibouchina aegopogon after flowering to maintain shape and encourage bushier growth. Remove dead, diseased, or crossing branches. Light pruning can be done anytime to shape the plant.

For more vigorous plants, heavier pruning can be done in late winter/early spring.

Tibouchina aegopogon can be propagated from semi-hardwood cuttings taken in late summer or early autumn. Dip the cuttings in rooting hormone and plant them in a well-draining potting mix.

Keep them moist and in a warm, humid environment until roots form.

Repot young Tibouchina aegopogon plants annually in spring. Mature plants can be repotted every 2-3 years. Use a well-draining potting mix. Choose a pot that is slightly larger than the current one.

Ensure the new pot has drainage holes.