September in the Pecatonica bottoms north of Winnebago is goldenrod to the shoulder, the river running low and brown, and light arriving long and level across the stubble. Diehl's Lawn & Landscaping does its best work in that stretch of the year — the last steady mowings, leaf cleanup as the silver maples let go, edges recut before the ground hardens. Fall is when a lawn either gets set up for spring or gets abandoned to it. The satisfaction is in the after picture: turf short and even, beds cleared, the yard ready to sit under snow. Winnebago and the nearby ground around Pecatonica, Seward and Durand.