Will it grow larger than it would if it were to stay in a planter? I'm wondering because I don't have a whole lot of room for things inside, but I have a pretty substantial yard and I like the way bonsai looks.

i think its triming and root control that make it small. its a actual tree that is groomed and controlled to stay small. plant it outside in a pot in the ground. that way you can have the best of both worlds.

I think its more of an indoor plant to be honest. Maybe the weather weould become too much for it, even if it's light weather conditions.