Fig trees come in many varieties, not just the typical garden fig. In fact, most fig trees, or ficus trees, don't even produce edible fruit. But fig trees do make lovely indoor trees because of their interesting shape and leaves. Fig trees are native to Southeast Asia, from India to Malaysia, and grow best in hot and humid weather, making them good indoor plants as long as you have a sunny window.
Fill a container large enough to house the fig tree with potting soil about 1/3 full. Place the fig tree in the container, loosening its roots with your hands, and fill the rest of the container with soil, patting it down firmly. Water the fig tree until water seeps out of the container's drainage holes.
Place the fig tree by a large, well-lit window, usually south or west facing. If you are growing a rubber ficus, it can handle a well-lit window with no direct light. Keep temperatures around 72 to 80 degrees Fahrenheit during the day and about 68 degrees Fahrenheit at night.
Water your fig tree with lukewarm tap water until the water seeps out of the bottom of the container. For most figs, allow the soil to dry out 3 to 4 inches deep before you water it again. Creeping fig trees need to be watered whenever the soil is dry, however.
Place a humidifier near your indoor fig tree or spray it with water a few times a day to maintain humidity if you live in a dry climate.
Fertilize your fig tree once a month during its growing season. Apply a water-soluble indoor plant fertilizer to the soil at ½ the recommended strength and water the fig tree well. Ween the tree off the fertilizer in autumn and start up again in spring.
Prune your indoor fig tree once a year in the spring to stimulate new growth. Remove any over-reaching foliage. Trim off any dead, damaged or diseased branches at the base of the tree. Do not remove more than 25 percent of the trees canopy as you prune.