In March the azaleas go off all over Leesburg and the crepe myrtles start thinking about it, and suddenly the shape of a yard matters. Southern Edge Landscape Design begins there — with the plan: where a bed should run, what a border ought to do, how the front of a house should meet its lawn. Then comes the ordinary care that keeps a design from unravelling — mowing, edging, trimming, keeping the beds clear, hauling off what each season sheds. South Georgia will grow anything you give it and then some, so the edge in the name is really discipline: a line held between the planted and the grassed. Done right, it reads as calm from the street.