Ficus trees are popular indoor plants because they often can “take a lickin’, but keep on tickin.” There are several species used, but the most common is the weeping fig (Ficus benjamina) and the larger leaved rubber tree (Ficus elastica).
For best results during northern winters, place the plants where they will get as much natural sunlight as possible. Whenever a change in environment occurs (water, temperature, light), they seem to drop a bunch of leaves, and then will slowly add new leaves to accommodate their new conditions.
Determine the amount of water by feeling the coolness and moistness of the soil. When the soil about 1½ inches down in the pot no longer feels cool or moist, it is dry. Then add water until it runs out the drainage holes of the container. Don’t water it again until the soil feels dry again. The time period between waterings will depend on light and temperature.
Fertilizer for ficus is not needed in the winter, as the plant is generally in a resting mode, and growth rarely suffers for a lack of nutrients. In the summer, the trees can be moved outdoors and that would be the time to add nutrients and allow the plant to put on new growth. Consider using a slow-release granular fertilizer or soluble fertilizer product.
Here are a couple of references for you to review:
• Fantastic Figs
• Care of Plants in the Home.
