Down in Grace Lord Park the Rockaway drops through the gorge and throws mist up into the trees, and on a cool morning that same damp lingers over the lawns a few streets above until the sun clears the hill. Heinz Landscaping LLC waits it out, then cuts — mowing at a height that lets Boonton turf take the July heat, trimming close along steps and stone, running the edges beside the walks, clearing beds of whatever blew in. Autumn means leaves, and there are a great many of them here. The work is plain and so is the reward: a lawn that looks even from every angle of a sloping yard. Boonton is a green town when it is tended, and tending is what it takes.