Ficus
There are several species of ficus that lend themselves to bonsai training. The small-leaf Microcarpa is often grafted onto the bulbous root of other ficus species, resulting in small leaves above large aerial roots.
Most Popular Types
Ficus ginseng (typically grafted of two ficus cultivars), Ficus benjamina, and Ficus retusa are the most common for bonsai. You may be familiar with the Fiddle Leaf Fig, which is also a ficus.
Light
Filtered bright sun. Move the plant gradually into direct sunlight if being moved from indoors.
Temperatures
Maintain a temperature above 60°F at all times. They will do much better above 70°F. Regularly mist the tree or provide a pebble tray to raise humidity levels.
Watering
Water deeply 1-2 times each week when the top 2 inches of soil are dry.
Toxicity
The sap is toxic to humans and pets.
Growth
While a ficus tree can grow to 70 ft in height in its natural habitat, it typically grows to 6 ft high and 3 ft wide in containers. Outdoor plants may bloom during the spring.
The trunks and branches are extremely flexible and are often braided. Ficus can live for three or more decades.
Leaves may drop if the tree is stressed from drafts, under or overwatering, too little light, low humidity, or pests.
Origin
India and Southeast Asia
Propagation
Stem cutting is the easiest method: cut a stem section at least 6 inches long with a woody end and new green growth. Dip in rooting hormone and plant in a pot of well-draining soil. Cover the cutting with a plastic bag, cutting a tiny slit at the top for it to breathe. Remove the covering after 3-4 months.
Dormancy
Ficus has short dormancy periods. Dropping of leaves is typically from stress rather than dormancy.