My wife and I have an agreement of sorts, she uses commercial fertilizer on the front lawn, and generally manages the front yard so it is all pretty and landscaped like my neighbors would want. I handle the backyard in a much more permaculture fashion. This year I spread a thin layer of well composted steer manure on the back lawn and it was greener and nicer than the front yard. I will probably do another application for the fall. Worked out really well, was cheap and easy!