October in Morningside is oaks and hackberries letting go all at once over streets laid out when the hill was still farm ground. Jay-Lan Lawn Care spends those weeks behind blowers and rakes, clearing lawns down to the green underneath so the grass can breathe until the ground locks up. The rest of the year follows a steady arc — mowing on a set week, edging the walks, aeration and overseeding in the cool of early fall when new seed actually takes hold. Sioux City yards are asked to do a great deal between the heat that comes up off the Missouri valley and the cold that comes down out of Dakota, and turf only holds if somebody tends it. A lawn that returns thick in April is the receipt for work done the previous September.