Ficus can be grown indoors, close to a sunny window, or outdoors year-round in warmer climates. Direct morning sunlight is preferable; direct afternoon sun can sometimes burn the delicate leaves. Ficus trees don’t like cold drafts and, are not fond of sudden changes. Make moves gradually. Use a humidity tray under your bonsai to keep humidity levels up. Ficus that live outdoors should be protected from frost and/or freezing temperatures.
Water slowly so it absorbs into the dirt, otherwise, the water will run all over your table. Mist occasionally with a spray bottle too. It helps take the burden off of the roots especially when it’s very hot and dry out. We pot our bonsai trees specifically to drain well, so it’s almost impossible to overwater
Fertilizing a bonsai is essential to its health because the nutrients in the soil leave very quickly with the water. When new growth appears in the spring it’s time to start feeding your bonsai. Use an organic liquid fertilizer or a chemical fertilizer diluted to one-half strength. Fertilize every two weeks during the growing season and once a month in the winter. Ficus responds quickly and enthusiastically to fertilizing; do not skip it.