The wind comes off Nantucket Sound at Kalmus and does not stop until it has crossed every yard in Hyannis Port. Three Brothers Landscaping works into it through spring, cutting the first flushes of growth, edging drives and clearing winter's sand out of the turf. Salt spray and steady gusts are hard on grass; regular mowing, feeding and trimming are how it holds its ground. Mulch, bed work and seasonal cleanups fill out the calendar from March onward. A lawn kept sharp in that wind says something about the people who keep it.