Evening at Brant Rock: the tide leans up against the seawall, the light goes long and gold across the Esplanade, and every lawn a street back is still holding the day's heat. Choppy Seas Landscape and Design LLC keeps those lawns in Marshfield — mowing, edging, trimming, and the cleanups that bracket the growing season on either end. Grass this close to the water grows in fits, and reading it right is most of the job. There is a plain pleasure in a yard finished at dusk, the clippings gone, the edge along the walk cut clean enough to run a hand down. That is their piece of the street, and they mean to hand it back better than they found it.