September evenings in Northfield stretch long and cool, and the light coming across Sondogardy Pond turns the lawns up on Bay Hill a deeper green than they managed all July. The Lawn guys keep those yards mowed, trimmed and edged, with mulch in the beds and cleanups bracketing the growing months. Up on the hill roads the ground runs to slope, ledge and odd corners, so getting a straight line out of it takes some doing. There is pride in the finish — the trimmed ring around the mailbox post, the beds swept out, nothing left ragged. By the time the oaks turn, the yard is ready for whatever the winter has planned.