August in Weldon Spring does not quit at sundown — the cicadas keep sawing away in the oaks and the heat sits in the driveway concrete well past nine o'clock. Jr. Mowers Lawn care makes good use of the cooler end of the day, when the light turns gold across a fescue yard and fireflies start lifting out of the grass just as the last trim line gets cut. Mowing at that hour is gentler on the turf and gentler on the person walking behind the machine, and the edges come out no less exact for the timing. There is a plain pleasure in latching the gate on a yard that looks finished. Summers run long in eastern Missouri, and a lawn given steady attention carries through them without sulking.