September comes early to the uplands of Clarion County, and in Knox the first maples blush red at their tips while the lawns are still deep green. ES Property Maintenance keeps those yards in trim through the long finish of summer, mowing, edging and tidying the lines beside sidewalks and driveways. Knox sits high on the Allegheny Plateau, where wind moves freely over open fields and the weather can turn on a dime. There is a quiet pride in the result: the borough's houses looking sharp beneath a sky gone wide and blue after a front passes. A well-kept yard here becomes a frame for the autumn about to happen.