I recently made the mistake of spreading fertilizer by hand. Now I have a spotty yard. Some areas are nice and dark green and some spots are lighter green, not quite dead but light green. I have done some deep watering over the past week. Do I need to reseed the light green spots or will they bounce back over time? I will use my spreader from now on, I just thought it might be easier to spread it by hand. Boy was I wrong.