Paul T. Given County Park keeps a stretch of the Nissequogue's bank green and open, and in early May the whole valley there smells like river and new grass. Longo's Landscaping & Masonry Inc. begins its lawn season around then — the wake-up cleanup, the first cut, beds edged back into shape after months of neglecting themselves. Weekly mowing and trimming carry it through summer, and the fall cleanup carries it out. A defined edge between lawn and stone is a small thing that makes a whole property look considered. Smithtown, St. James and the neighboring towns fill the schedule.