Lawson Tower stands over Scituate wrapped in wooden shingles, and when the bells ring the sound carries clear across the neighborhoods below. Presidents Landscape & Design keeps those neighborhoods trimmed — weekly mowing, sharp lines along walks and drives, borders weeded and mulched. The spring visit pulls the winter's wrack out of the beds; the autumn one clears leaves down to living grass. Salt air and light soil make a coastal lawn particular, so the blade is set a touch high through the dry weeks of August. The result is simple and worth having: a green yard, a clean line, a house that looks glad to be lived in.