A July thunderstorm rolls over northwest Cook County late in the afternoon, drops an inch, and by Thursday every lawn in Elk Grove Village has grown three days' worth overnight. CPK Lawn Maintenance Inc plans around exactly that — mowing back to an even height, trimming the lines the deck cannot reach, clearing clippings off the drives and walks. Turf here can go from lush to stressed inside a fortnight of heat, so the cut height moves with the weather instead of against it. What the homeowner sees is a yard that never looks like it got ahead of anybody. That steadiness, all summer long, is the service.