Each year the grass in one part of my house looks great each Spring, then about this time it thins out quite a bit. It seems like last week it looked great and today it is a little thin. It happens in the same spot each year. I live in NJ and its Kentucky Blue grass. The area is under some trees, It gets some sun each day I was thinking of trimming some branches to see if I could get some more sun in there. Any ideas?