Alpinia aquatica requires consistently moist soil. Water thoroughly when the top few centimeters of soil begin to dry out. Avoid letting the plant sit in waterlogged conditions, as this can lead to root rot.

Reduce watering slightly during cooler periods, but do not allow the soil to become completely dry.

Pruning Alpinia aquatica primarily involves removing dead, damaged, or yellowing leaves and flower stalks. After flowering, cut back the spent flower spikes to the base of the plant.

This encourages new growth and maintains a tidy appearance. Minimal pruning is generally required.

Alpinia aquatica can be propagated by division. In spring, carefully divide overgrown clumps into smaller sections, ensuring each section has roots and shoots.

Replant the divisions immediately into suitable pots or beds with well-draining soil. Water well after planting and maintain consistent moisture.

Repot Alpinia aquatica every 2-3 years or when it becomes root-bound. Choose a pot that is slightly larger than the current one. Use a well-draining potting mix, such as a blend of peat, perlite, and compost.

Repot in spring before the active growing season begins.