Water Justicia spicigera regularly, keeping the soil consistently moist but not waterlogged. Allow the top inch of soil to dry out slightly between waterings, especially during warmer months.

Reduce watering in cooler periods to prevent root rot. Ensure good drainage in the pot.

Prune Justicia spicigera regularly to maintain a desired shape and encourage bushier growth. Pinch back the tips of young plants to promote branching.

Remove spent flowers and overgrown stems to improve air circulation and stimulate new blooms. Heavy pruning can be done in early spring.

Propagate Justicia spicigera from stem cuttings. Take 7-10 cm cuttings from healthy stems in spring or summer. Remove lower leaves and plant in moist potting mix or water. Roots typically form within a few weeks.

Once established, transplant to individual pots.

Repot Justicia spicigera every 1-2 years or when it becomes root-bound. Choose a pot that is one size larger than the current one, with adequate drainage holes. Use a well-draining potting mix.

Repotting is best done in spring before the active growing season begins.