Keep the soil consistently moist but not waterlogged. Water thoroughly when the top inch of soil feels dry to the touch. Reduce watering slightly during cooler months, but avoid letting the soil dry out completely.

Ensure good drainage to prevent root rot.

Prune Dianthera calycina lightly after flowering to maintain its shape and encourage bushier growth. Remove any dead, damaged, or leggy stems. Pinching back the tips of new shoots can also promote a more compact habit.

Propagate Dianthera calycina from stem cuttings taken in spring or early summer. Select healthy stems, cut a 10-15 cm piece, and remove lower leaves. Dip the cut end in rooting hormone and plant in moist potting mix.

Keep humid and warm.

Repot Dianthera calycina every 1-2 years, or when the plant becomes root-bound. Use a well-draining potting mix. Choose a pot that is only slightly larger than the current one. Repot in spring before new growth begins.