Come the first week of July, flags go up on porches and mailboxes across Sugar Hill and the whole town takes on a certain tidy, celebratory look. Stars and Stripes Lawn Services keeps the ground underneath them looking the part — lawns mowed, edges reopened along the walks, corners trimmed, clippings cleared from the drive. Midsummer here is humid and demanding, and grass that gets cut on time keeps its color instead of going stringy. The crew works early, before the heat settles over the ridge, and leaves each yard with its lines running clean to the street. A neat front lawn is a small form of hospitality, and this town understands that.