Early on a June morning Kennedy Park is all long shadows and the smell of dew burning off, with Mount Hope Bay flashing silver at the bottom of the hill. JJC LawnCare starts its weeks in that light — mowing, trimming around fences and granite steps, running a clean edge where grass meets sidewalk. Fall River yards are small and steep and they show every shortcut, so the lines have to be straight and the corners have to be finished. Spring means clearing off whatever winter left behind; autumn means staying ahead of the maples. A well-cut lawn on a hill street is a bright little rectangle you can pick out from three blocks down.