Your neighbor's yard may not be as bad as this picture, but may be making it difficult to keep the weeds out of your grass. If neighboring weeds are constantly growing, and going to seed, it's going to be difficult to keep the weeds from sprouting in your yard. Less frequent waterings, pre emergents and getting your grass as full as possible, are the best securities against newly germinating weeds. If you're the neighboring yard that looks like this, here is your wake up call, that your neighbors hate you.