September is when lawns on this shore get their real chance — cool nights, warm soil, and rain that finally amounts to something. Lawn Technology Inc. works that window with mowing, aeration and overseeding, fertilization, weed control and the clearing that follows the leaf drop. Glen Cove ground shifts from sand near the water to heavier loam a mile inland, and a lawn program has to read that difference honestly. Watching thin patches knit back together before the trees go bare is the part worth staying out for. The city and the villages ringing it make up the season's map.