Out where the road narrows toward Thunderbolt, the lawns run out and the spartina takes over, and the tide decides how far the green goes on any given day. Tidewater Landscape Management Inc works that edge — mowing and edging, trimming, and clearing the clippings and storm litter that collect along a marsh-side property. Salt air and sandy soil are hard on turf, so it is kept on a schedule rather than rescued after the fact. Grounds maintained that way hold their shape through the wet weight of August and the bright, mild weeks of January. A property that meets the marsh cleanly is a fine thing to stand and look at.