There is a particular satisfaction in leaving for work with a shaggy yard and coming home to a cut one without having heard a thing. Lawn Ninja, LLC works that way across Cumming: in, mowed, edged, trimmed, blown clean, gone, with the gate latched behind them. Summer here demands a weekly rhythm, and the schedule holds through the heat and the afternoon thunderstorms alike. Come late fall the same route turns to leaves, lifting the oak and sweetgum drop off the turf before it mats down and smothers what is underneath. Quiet, quick, finished — that is the whole idea.