Turmeric (Curcuma longa) is a tropical plant in the same family as ginger. Not a dainty plant, turmeric has large green leaves and grows 3 or more feet tall. As the plant matures each stem sends up a spike of greenish-white and occasionally pink flowers. Like ginger, turmeric thrives in warm, humid conditions and well-drained, neutral soil.
For curcuma in containers, you can stop watering the container once the foliage starts to go yellow. Let the potting mix dry (and remove any other plants that may be growing with the curcuma), then you can store the entire pot in a cool place (50F/10C) for winter. Sprinkle just a bit of water in the pot a couple of times over winter so the tubers don’t completely dry out.
Bring your curcuma back outdoors to a shaded or partly shaded spot in spring after all danger of frost has passed. With warm temperatures and moisture, the tubers should quickly resume new growth.