Lake Massapoag holds the middle of Sharon like a held breath, and in July the lawns that slope toward it are the greenest thing for miles. Blue Grass Landscapes tends them week to week — mowing, trimming, edging, and the cleanups that start the season in spring and close it out in fall. When the town goes quiet and white, the same crew handles the snow: plowing driveways, clearing walks, treating ice on the pitches where a car needs help getting out. Sharon winters make a person grateful for a drive that is already open at seven in the morning. The work runs through Sharon and the towns bordering it.