Selden grew up along Middle Country Road on the sandy ground the pine barrens left behind, and grass here takes attention to stay thick and green. L I Lawn Maintenance Inc mows those yards on a steady weekly turn, cutting high enough in July that a lawn can shade its own roots. Edges are run along the sidewalk and the driveway apron, and the cuttings are cleared before the crew moves on. Spring cleanups empty the beds of winter and get mulch down; autumn brings the oak leaves, which come late and heavy on the rise toward Bald Hill. Yards are kept in Selden, Centereach, Farmingville, Coram and Lake Grove.