The north end of Tybee wears its history in concrete — the low battery walls of old Fort Screven set back in the sea oats, and above them the lighthouse in its black-and-white bands, visible from half the yards on that side of the island. Coastal Organic Lawn Service works those blocks in spring, when everything comes back at once and a lawn can go from dormant to shaggy in a fortnight. Mowing, edging and trimming are the backbone; bed cleanups and mulch keep the plantings from disappearing under the season's rush. Wind off the north beach carries sand into every corner, so the last thing done is always the blow-off, walks and steps cleared clean. It is small, careful work, and it shows best at the end of the street when the whole row is even.