There is an hour in late June when the St. Joseph River bottoms still hold their coolness and the whole of Buchanan Township smells like cut grass and warm fruit. Greenleaf Lawn Service LLC works right through it, mowing, trimming and edging yards from the village blocks out to the long gravel drives that end at orchard rows. Grass in this river valley grows fast and forgives nothing; miss a week in July and everyone can see it. So the schedule stays tight, the blades stay sharp, and the stripes come out true even down the slope of a lawn. By dusk, when the fireflies start up over the fencerows, the yards along the route look combed.