Up by Wallum Lake, where Rhode Island runs out into the Buck Hill woods, the seasons arrive early and leave late. C.KEEN Property Maintenance works that whole stretch of calendar — cutting grass, trimming the ragged seam where lawn meets treeline, edging beds, spreading mulch, hauling off the leaf fall that comes down heavy under all that oak. Then the snow: plow on the drives, shovel on the steps, sand and salt on the ice that hardens in pine shadow and stays. Lakeside lots are all slope and shade, which makes both jobs a question of angles. Done right, the yard looks loved in July and in January alike.