Ficus benjamina--also called benjamina ficus and weeping fig--is a woody plant that is commonly grown as a houseplant. Ficus benjamina is a member of the ficus family, and related to the rubber tree plant. The ficus benjamina is known to be a very finicky plant, with specific moisture needs. In order to prevent the ficus benjamina from dropping its leaves, the plant owner must mist the plant.
Fill a clean spray bottle with filtered water. Twist the nozzle to the "mist" setting. Test the spray to make sure that the water sprays out in a very fine mist.
Mist the plant daily with the bottle of water. Rotate the plant so that all sides of the plant receive the same amount of moisture. Take the time to use your free hand to gently lift the branches so that the under sides of all of the leaves receive moisture.
Increase the frequency to two mistings per day during the winter. Although the plant is dormant during the winter, it still requires atmospheric humidity. During the winter, homes' heating systems reduce the amount of humidity in the air. If the benjamina ficus does not receive supplemental moisture--in the form of water mist--it will lose its leaves.