Late on a September afternoon the light crosses the First Watchung ridge sideways and every blade of grass in North Caldwell throws a shadow. Triple J Landscaping likes finishing then — the last mow of the day laid down in even passes, fence lines trimmed, walks and drives edged and blown clear. Through the season it is weekly cutting, weeding, mulching and hedges kept level; at either end of it, the cleanups that open a yard in spring and empty it of oak leaves in fall. Up here the lots run wide and the trees run old, so a lawn that stays sharp takes returning, not rescuing. Coming back every week is the entire method.