Rain comes to Yonkers off the Hudson in long grey sheets, and by the next morning every lawn on the hill above Untermyer Gardens has gone a shade greener overnight. Nature's Rain Organic Lawn Cr works in that rhythm — mowing, edging, feeding and overseeding the yards of the city between one soaking and the next. There is a real satisfaction in the first cut after a wet week, when the mower leaves clean parallel bands down a slope and the clippings smell like the whole month of May. Cleanups at either end of the year keep the beds open and the turf breathing. It is ordinary work done carefully, and it shows from the sidewalk.