For about three weeks every spring, northwest Georgia turns yellow — pine pollen on the porch rail, on the truck hood, on the white siding, in the corners of the driveway. B & S LAWNCARE and PRESSURE WASHING llc arrives at the far end of that with a mower and a wand: lawns cut, edged and trimmed, then concrete, siding, walkways and porches washed back down to their own color. There is a particular pleasure in the wet dark line that follows the nozzle across a Calhoun driveway, the before and the after separated by an inch. When the yard is striped and the walk is bright, the whole house sits up straighter. Summer can come on after that.