On a Harrisburg side street in late June the shade falls in patches and the mowers keep running until the light turns orange. Lucas Lawn Service is out in that hour, cutting, edging and trimming its way across town at a steady pace. The finish is the good part — clippings blown off the sidewalk, a sharp line where turf meets driveway, a yard that suddenly looks deliberate. Spring and fall bring the bigger cleanups, the raking and hauling that let a lawn breathe again. Grass grows fast in this corner of Illinois, and keeping ahead of it is most of the art.