URBANA, Ill. — As the sun sets on another summer season, lawn care does not stop. When it comes to routine turf maintenance, the late summer to early fall months are critical for cool-season lawns.Cool season lawns are a group of turf species comprised mainly of Kentucky bluegrass, tall fescue, perennial ryegrass, and fine fescue. Many Illinois homeowners with a lawn are likely to have a cool-...