Salt gets into everything in Westhampton Beach — the air off Moriches Bay, the wind that comes over Dune Road and does not stop until it meets a hedge. Lyons Landscape & Design Inc. keeps lawns green inside that arrangement, cutting on a weekly rhythm through the bright months and trimming close along walks and fence lines. Beds edged and mulched, shrubs held to their shape, hydrangeas given room, the turf kept even from the front walk to the back gate. In September the crowds thin, the light turns silver over the water, and the yards look their finest with nobody watching. Cleanups bracket the season on either end.