Late August at Good Harbor: the causeway crowded, marsh grass gone gold at the tips, and every lawn on the Bass Avenue side wanting one more cut before Labor Day. Cutting Edge Landscaping Corp mows and trims through it, running bed and walk lines with an edge sharp enough to read from the street, then mulching and shaping shrubs so the form holds. Fall brings the cleanup and the long haul of leaves; spring brings the reverse, plus seeding and fertilizing where winter thinned the turf. In cold months the blades change over to plows — driveways cleared, paths cut to the door, sand and salt on the slick spots. A straight line where grass meets pavement is worth doing well.