First frost in Brighton settles into the hollows — the low corner of a yard turns white while the rise beside it stays green, and by nine the sun has erased the difference entirely. Trost Outdoor Services is usually out in that hour, putting down the season's later cuts while the ground is still firm underfoot. Summer is weekly mowing, trimming along fences and foundations, edges kept sharp and clippings cleared off the walks. Then the leaf work arrives and does not really let up until the oaks are bare and the beds have been cut back. Brighton, Hamburg, Pinckney and Whitmore Lake.