Late April at the edge of the Marsh Sanctuary, the woods are still bare while the open ground has gone soft and green almost overnight. Luppino Landscaping & Masonry LLC starts the year there and everywhere else in Mount Kisco with the spring clearing — winter litter off the beds, the lawn raked out and given its first cut, mulch laid down dark against new growth. From then on it is mowing, trimming and edging on a steady rhythm, week after week, until the leaves come down and the circle closes. A clean bed line against turf is a small piece of geometry, and it holds a yard together all summer. The work reaches Bedford Village, Katonah, Pound Ridge and back again.