The Whippany River loops quietly behind Cedar Knolls, and on summer mornings the low ground along it holds mist until the sun finally clears the treetops. Deluxe Lawns USA LLC works the neighborhoods off Columbia Turnpike and the properties out along Route 10 — mowing on a set weekly line, edging drives and walks, trimming close to foundations and fences, and running the cleanups that bracket the growing season. Morris County soil here is rich and damp, so June growth comes fast and asks for regularity more than anything else. There is an ordinary kind of pride in arriving the same day each week and leaving a place looking settled. Come autumn the maples along these streets make it a longer job, and a more satisfying one.