Here is my grass
This is the nature strip outside my house. I leave it alone apart from organising to get it mowed every so often. All it gets is (comparatively rare) rain water. It’s lush and green. I don’t know why.
This is my front lawn. It gets some greywater, and a regular mowing, but is otherwise left alone. It’s a little grizzled, but surviving okay. One patch has a fresh growth of new grass.
And this is my back lawn. It gets lots of greywater (from the youngest’s bath) several days a week, and I’ve even tried putting new seed on it to get it kickstarted again. It used to be lush and green, but is now mostly barren, apart from a thin strip along one side. I think it was instant turf stuff, laid by the previous owners when the house was for sale, to look good at the time. I’ve just about given up on growing anything other than dirt on it (at least until autumn, when I’ll dig it all up and put new seed and soil on it). Maybe I should start a dirt farm.