Get low enough and a lawn is a country of its own — ten thousand blades all leaning the same direction after a mower passes. Turf USA Lawn Care tends that country across Niagara Falls, mowing, trimming and edging the yards off Military and Porter Road and handling the cleanups that open and close the season. August can turn a strip of grass to straw in a week here, and then the river throws up a damp gray morning and the whole block greens again overnight. Working with that rhythm instead of against it is most of the craft. The reward is small and it is real: stripes holding straight across a front yard, a curb line with no stray green on the concrete, a place that reads as cared for from the far end of the street.