All my bonsai are outdoor. Ficus Benjamina is actually just average for a bonsai. There are other ficus like Ficus retusa, Ficus benghalensis and Ficus obliqua.that are much better for bonsai because they grow flying roots easier and can cover rocks and other objects easily. They give you a finished looking bonsai in just a few years. Many more species are available in the wild in south Florida. Most can be made from cuttings rather easily and those that won't can be air-layered in just a few weeks. [I could send you some strangler fig rooted cuttings in the mail if you would like. Let me know. I'd have to send them before the temprature gets too far below zero. They are tropical but can tolerate a few days of chill. email me krustyart@yahoo.com]