Go and look up the history of lawns. Unless you have kids that play on it or animals that you graze on it, then there is no point and youre part of the trick to make people think they should exist.

If you cut your lawn on a regular enough basis (if it never gets over grown), then you do not need fertiliser. If your lawn is suffering on a regular basis, then your dirt is stuffed or you have the wrong kind of grass. But Anman, that is why I use fertiliser, because my dirt is not good enough. Then you will continue to need fertiliser for the rest of the lawns life. Fix the dirt. Right dirt and right grass for your environment will never need fertiliser.

I have never fertilised grass in my life.