Toward the Massachusetts line the Nashua lots open up — broad front lawns off Broad Street, long side yards, grass enough to need a plan. William and Sons Landscaping Corp. handles that acreage with mowing on a set rotation, trimming and edging to finish the perimeter, and landscaping that gives a big yard structure instead of just size. Late August is the test, when heat has flattened everything and a lawn either shows its care or doesn't. Cleanups come around in spring and again when the leaves fall, hauling out what the season leaves stacked against the foundation. Fathers, sons, and a straight line down a very long lawn.