October tips over into November along the Merrimack, and the work turns with it — one week it is leaf removal and fall cleanup in the yards below the old brick mills, the next it is a plow blade waiting on the first storm. Garcia's Landscaping LLC keeps both ends of that swing in Manchester: mowing, edging, aeration and fertilization through the green months; mulch, flower beds, shrubs and trees set into the ground; patios, walkways and retaining walls built to hold a New Hampshire hillside still. There is a particular satisfaction in a walkway that runs true across a sloping lot, in a garden bed cut clean at its border, in a driveway opened before the light comes up over the eastern ridges. Ponds, waterfalls, irrigation lines and poolside plantings fill in the rest — the smaller pleasures a yard gives back all summer long. From Manchester out through Bedford, Goffstown, Auburn, Litchfield, Derry and Londonderry, it is the plain physical business of leaving a place better than the season found it.