Thank you so much for your reply. I hadn't thought that I might be over watering it since my trickle method has always worked so well for me. It is in a raised bed with good drainage & last week I didn't water it at all because we got more than an inch of rain. I too read that the rostrata can take more sun so I think I will leave it for now & watch it like a hawk. If it shows any other signs of distress I'll have to reconsider. Feeling hopeful... If it adapts to the sunny spot it's going to be the perfect slow-growing, small deck tree.