Curcuma will go dormant. Beginning in November, decrease watering to allow the leaves to die back naturally. Stop fertilizing during this time. Let the plant rest for 3 months. In early spring, repot the rhizomes in fresh potting mix and resume normal care.
Feed your Сurcuma once or twice a month during the growing season (spring through summer) with a half-dose of water-soluble, balanced fertilizer formulated for tropical foliage plants.