Deerfield keeps its big trees, and in October the oaks let go all at once, a week of leaves over lawns that have been shaded all summer. Bur Oak Landscape LLC works those yards through the season: mowing on a set schedule, trimming around trunks and bed lines, edging walks and drives, and pulling leaves out of the turf before they mat down and smother it. The best moment is the last pass of a fall afternoon, when the lawn is bare and green and the curb line is sharp. Spring asks the opposite job, waking the grass up, clearing out what winter left, getting the first cut down before the village gets ahead of it. Quiet work on shaded streets, where the commuter trains slip past behind the trees.