Hey guys, I need some help with my grass. I bought a new home and had new bermuda sod installed. I fertilized with a starter fertilizer and it grew great. I had the best grass in my neighborhood. Since then, my grass has gotten worse and worse. I hired a lawn service to take care of my weeds and fertilize it accordingly, but they were horrible and my grass got worse with them. I sinced cancelled them. My issue now is that my grass is very yellow on the base and green at the tip. I had kept my grass pretty long because I was scared to cut it too short and expose the yellow base. Well, I don't know if leaving it too long all spring and most of summer kept it from greening at the base, but it is yellow. I have been cutting it shorter and shorter, so I can expose the yellow base in hopes to let it have some sun and turn green. Doesn't look to be working. I have fertilized with nitrogen numerous times this spring and summer and recently threw down some 13-13-13 all purpose fertilizer. Now my grass is about 1.5-2 inches in length and completely yellow. Help! I am embarrassed and hope the neighbors don't hang me my the neck for my grass looking like it is dead winter. What do I need to do to get it green throughout? I am watering twice a week.