First light comes up off Manhasset Bay and slides across the lawns of Cow Neck, and that is the hour this work belongs to. Bonavitacola Landscaping mows, edges and trims through the Port Washington summer, opens the beds in spring, and clears the leaves once the maples let go. Salt in the air asks something extra of a lawn here — an even cutting height, clean lines along the walk, an eye on the thin strip by the curb before it gives up. By midmorning the mowing stripes run parallel to the water and the driveway edge is drawn sharp enough to follow with your eye. A well-kept yard on a peninsula street is a small thing, and it is worth getting exactly right.