If your ficus is losing its leaves, go through the checklist of proper ficus tree care and correct anything that you find wrong.
You can use a glass cover, fish tank or a construction with transparent sheets for this purpose.
Most ficus bonsai trees can produce aerial roots in their natural habitat, which are often presented in appealing bonsai creations with many aerial root pillars or root over rock styles.
Ficus trees also cannot tolerate low temperatures or drafts. They need to be kept in temperatures above 60 F. (16 C.) and actually prefer temperatures above 70 F. (21 C.).
The flowers are inconspicuous and the plants are grown mainly for their foliage