Congratulations on your tree. I am no expert but I have done a bit of studying and observing. Recently I visited a bonsai nursery and noted that while most of the trees were outside, most were also under the shade of a large tree. This seemed to help filter the amount of sunlight the smaller, more delicate trees were exposed to. I have been giving thought to how I can create a natural filter for my tiny trees. I am currently centering my new hobby on my patio which gets full sun for about 6-8 hours a day. Although my delonix regia seedlings are flourishing, I'm concerned for other types of trees. There are no trees close to my patio so I'm going to have to be creative.