I moved into my home four years ago. The previous owners had lived there for about ten years and had done NOTHING with the lawn (besides the occasional mow). The front yard faces south and was 50% weeds-50% unidentifiable grass. It was green but that was about it. Ive managed to make it very presentable with a lot of persistence and hard work. Here is the problem. The back yard faces north and receives very little sun. There were three very large un-manicured maple trees. The before mentioned owners didnt believe in raking or any yard care. I have installed a large patio in the area that never sees the sun. I have trimmed back the maples to allow more sun to reach the ground. The soil is in decent shape but is very compacted. My questions areShould I roto-till the existing wasteland or aerate it? The area is rather large, 120 X 160. What kind of grass would you guys (or gals) suggest?