Summer mornings in Valhalla come in with mist standing on the water and the young Bronx River slipping south under the trees, barely wider than a stride. J's Landscape Services is out in that first cool hour, when grass cuts cleanest and the stripes hold their line all day. Mowing, edging along walks and beds, string-trimming the awkward corners, then blowing every clipping off the pavement — the finish is the whole point. By the time Westchester is fully awake the yard looks like nobody was ever there, which is exactly right. Fall brings the leaf work, week after week, until the turf lies flat and even and ready to sleep.