Low humidity, under- or over-watering, and insufficient lighting are all common problems when caring for a ficus tree. Ficus are rapid growers, and trees should be provided with plenty of nutrients. Pests such as spider mites, scales and mealybugs can also cause harm to ficus trees.
Indoor ficus trees require well-lit environments. Ficus trees also suffer in cold and drafty environments, and they do best in temperatures above 60 F. Ficus trees respond to stress by shedding leaves, which is often the most common problem owners experience. Sap dripping from a ficus tree is a common sign of parasitic pests.