Height: Up to 4 ft (1.2 m) indoors
Light: Bright, indirect sunlight
Water: Keep soil evenly moist year-round. Don't allow the soil to become soggy -- or dry out. Either condition will cause the China Doll plant to drop its leaves. Yellow leaves are a symptom of overwatering.
Humidity: Try to maintain 40% relative humidity around your plant. Indoor air can become extremely dry in winter; it's a good idea to use a humidity monitor rather than guess. Use a humidity tray or a cool-mist room humidifier, if needed.