By October the oaks and hickories along the Bridgewater roads have gone the color of old brass, and every lawn beneath them is a week from disappearing. Stevenson Arbor Care, LLC works that stretch — leaf cleanup and hauling, the closing mows of the year, trimming and edging so the shape of a yard survives the drop. Through the growing months it is steady lawn upkeep on the rolling ground toward Manchester and Clinton, where a mower spends as much time on a grade as on the flat. Shade that deep makes for thin grass, so the cut runs high and the interval reads the yard instead of the calendar. When the first hard frost comes, the lawns are clean and the beds are clear.