When the last of the harbor ice lets go and the wind off Massachusetts Bay softens from raw to merely brisk, the mowers wake up along Marblehead's crooked, clapboard-lined lanes. Nolasco Landscaping and Construction sets its lawn care to that hinge in the year, coaxing the first green up between granite ledges and old stone walls, tracing a clean edge where turf gives way to weathered rock. There is a plain, honest satisfaction in a yard cut low and even under the long coastal light, the kind that keeps its shape from the winding streets of Old Town down to the water's edge. Cut by cut, the work carries the grass's color right out to the rim of the sea.