October turns the parkway maples along Tinley Park's older streets, and within a week a mowed lawn is invisible under them. Letterman Lawncare works the whole arc rather than one week of it: the first cut of April, the weekly pass through the growing months, the fall cleanups that carry a yard down to bare, breathing turf before the ground locks. Downtown near Harmony Square the lots are small and squared off, while out toward 171st Street the yards run long and open — different jobs, same crisp edge along the walk. Grass on this old prairie ground grows fast and forgives little, so timing is most of the craft. The reward comes in November, when the leaves are gone, the beds are cut in, and the yard looks like it is resting rather than forgotten.