This is the 3rd year that I have had this tree in a 24 inch container. We had a late frost this year (Atlanta), and the tree was slow to wake up. I have noticed that the leaves are turning from green to red and some of the internodes are longer than usual. It's in full sun for about 6 hours, appears heathy despite the color change. I plan on planting it out in my yard this fall. Any suggestions?