Oksana Dudyk scanned a small selection of ornamental plants lining the shelves of her new florist shop, recently opened in this city on Ukraine’s western frontier. Her eye landed on the perfect bloom for a new customer: fuchsia-colored primroses, vivid and lush, ideal for brightening an austere corner.
It was late afternoon, and the flowers were only her 10th sale of the day. But that was nothing short of a miracle for Ms. Dudyk, who started…