A well-kept yard pays its people back every day — in the clean line where lawn meets bed, in a walkway you can cross in slippers on a January morning, in a porch view that looks finished rather than merely mowed. SSE Landscape Contractors works that trade across Bridgewater and the towns spread along the Taunton River plain, where the ground runs flat and sandy, the oaks lean in close, and the light comes low and long over old brick streets in October. Their days move from spring cleanups and lawn renovation into mowing, pruning, mulch and bark blowing, seasonal flower programs, fertilization, aeration, weed and crabgrass control, tick and mosquito treatment, irrigation, plant design, retaining walls, hardscapes and landscape lighting — then, when the wind turns, into commercial plowing, snow removal, de-icing and walkway clearing at whatever hour the storm decides. There is a real satisfaction in it: a bed edged so cleanly it holds its shape until November, a lot scraped down to blacktop before the first car arrives, a hydroseeded slope that greens in and stays. Bridgewater, Brockton, Easton, Middleboro, Plymouth and the rest of the South Shore keep them busy, one property at a time.