North of Dunellen the ground tilts up toward the first Watchung ridge, and on a late-May evening the whole borough smells like cut grass and lilac. Sweet Leaf Lawn Care LLC belongs to that hour — mowing on a weekly turn, trimming the edges, cutting a firm border where lawn meets bed or walk. The season starts with cleanups and mulch and ends with leaves lifted off the turf before the first freeze settles in. In between it is repetition done well, which is the only way a lawn has ever really looked good. There is something worth the effort in a small yard, evenly cut, in the last hour of daylight.