In May the silver maples on Aurora's east-bank streets drop their seeds by the thousand and every lawn wears a green confetti. BANKS LAWN CARE mows through it, clears it, and edges the walks back to a crisp margin so the concrete looks poured yesterday. The list is short and steady: regular mowing, string trimming, edging, mulch, and spring and fall cleanups. Those older blocks near the river carry deep lots and mature shade, which means slow growth in one corner and a jungle in another, and the job is making a single lawn out of both. It is ordinary work that changes the whole feeling of a house from the curb.