The Tenakill runs quiet through Closter, and the lawns that fall away toward it hold their color deep into August when everything up on the drier ground has gone dull. Hans Landscaping Inc. keeps a summer route through those blocks, cutting at a height the grass can live with, trimming the low wet corners by hand, and blowing the walks clean before the truck pulls off. The work is unglamorous and it shows anyway: a long lawn mowed in straight lines, the edge along the drive drawn sharp. Autumn brings the leaves down all at once in a town this wooded, and the crew comes back for those too. Lawn care for Closter and the surrounding Northern Valley boroughs.