Like Giga, I keep mine in full sun. My guys are pathetic baby stick trees though. I keep my japanese maples in full sun too, but noticed I can't do that the year I collect them. If you defoliate the tree I think it'll get used to what you give it. I'm by no means an authority on these trees but I'd be cautious putting it in the shade for too long. If this tree starts reaching for sunlight I can't imagine how long the internodes could get. And if I'm not mistaken, internodes equal future bud sites, SO even in a grow out phase it might be wise to keep your guy bushy. Some one step in and correct me if I'm wrong