Keep the soil consistently moist but not waterlogged. Water thoroughly when the top inch of soil feels dry. Reduce watering slightly during cooler months, but never allow the soil to completely dry out.

Ensure good drainage to prevent root rot, a common issue with overwatering.

Prune to remove dead, damaged, or leggy stems. Cut back stems to the soil line to encourage new growth from the rhizomes. This also helps maintain a tidy appearance and can stimulate more prolific flowering.

Pruning is best done in spring before new growth begins.

Propagate Costus arabicus through division of rhizomes. In spring, carefully dig up the plant and separate the fleshy rhizomes, ensuring each piece has at least one growth bud.

Replant these divisions in fresh, moist potting mix, and they will establish quickly.

Repot your Costus arabicus every 1-2 years, or when it becomes root-bound. Choose a pot that is one size larger than the current one.

Use a well-draining potting mix, ideally one formulated for tropical plants or with added perlite for aeration. Repot in spring.