Few things signal warmer days more brightly than boxed blooms hanging from windows in city brownstones and suburban Victorians, Kate Grip Denon writes. "Window boxes are super easy to maintain, and you can do a lot in a small space," says James Hohmann, general manager of Mahoney’s Garden Centers in Brighton. From sleek succulents for an urban loft to elegant flowers for a stately home, here Hohmann has created four options for arranging a beautiful box.