We've had our house for almost 2 years. We moved in 2 Octobers ago and the yard never really "took" all that well when put in. I'm trying to figure out what is causing the problem so I can attempt to remedy the issue myself, but I don't know much about lawns at all. Our neighbors have had theirs treated by a commercial company and it looks fairly nice (though it was in better shape to begin with). In the pictures below, the dark green patches are the edges of my yard where it blends with theirs. Can anyone help me identify what is going on in the pictures below? Is it under fertilized? Does it need to be dethatched? Does it need to be aerated? Any help at all is very welcomed and appreciated! Here are some pics: Thanks again!