In June the Souhegan runs low and green under the bridges before it gives itself up to the Merrimack, and the lawns along both banks come in thick and fast. Firman Landscape Company mows that growth week by week — the wide sunny yards off Baboosic Lake Road, the shaded strips beneath the pines, edges trimmed until grass meets walk in one honest line. Cleanups bracket the year here: sand and pine straw raked out in April, oak leaves hauled off in a November wind. The routes cover Merrimack and the towns next door, steady and repeating. It is simple work with a plain reward — a yard that reads as cared for from the street.