PRICES MAY VARY. There is nothing more Southern than a well-tended garden or a tastefully and comfortably appointed porch. Now, the editors at Southern Living , the authority on all things Southern, bring you an all-new Special Edition— Porches & Gardens , that will help you create your own backyard haven. Covering porches and patios, garden retreats, backyard makeovers, the hostess handbook for entertaining outdoors and 5 instant upgrades you can do right now to jumpstart your…