Middle Tennessee summers keep a schedule of their own: hot and still all morning, then a wall of gray building up out of the west by three. JT'S Lawn Care works the windows between them, mowing, edging and trimming while the ground is still dry enough to hold a wheel. Out past the fields near the Sam Davis Home you can watch the rain coming from a mile off, which is either a warning or a countdown depending on how much yard is left. Rain-fed grass in July gains an inch overnight and waits for no one's calendar. Staying ahead of it is most of the job; finishing clean before the first drops hit is the rest.