About a month ago I planted two approximately 6 foot tall crepe myrtles, one on each end of the front of my house. One of them is doing very well and has new branches up to a foot long already, while the other is not doing so well. The "sick" one has a few leaves that have turned yellow, and all of the leaves are wilted looking. It also has none of the new growth that the other one has. The only difference between the two is that the one that is doing well is on the end of the house that gets sun pretty much all day long, while the sick one only gets sun starting at probably 1:00PM. Is there anything I can do?