Toledo greens up fast in late April, and along Sylvania Avenue the difference between a lawn that was tended and one that wasn't shows within a week. Perf-A-Lawn of Toledo Inc works that window and every one after it — regular mowing, trimming around beds and posts, edging the walks, keeping a yard tidy from the first cut to the last cleanup of the fall. Grass in this river town grows on heavy soil and doesn't forgive neglect, so the answer is rhythm rather than rescue. It is a satisfying thing to pull up to a yard and leave it looking like a held note: even, dense, cut to a line. That's the work, week after week, across the city.