October along Haverhill Street is a slow rain of maple leaves, gold on the sidewalks, drifting into every hedge and window well. Diamond Landscaping & Tree Services works that season hard — leaf cleanup, the last cuts of the year, beds put to bed — after a summer of mowing, edging, trimming and mulch. Then the first storm arrives and the same driveways want plowing, the same walks want shoveling, the same front steps want salt. Watching a property hand off from one season to the next in good order is its own kind of reward. The work covers Lawrence and the towns next door.