Halfway between the mountain and the sea in the South of France, buds of the world’s most fragrant rose are preparing to open. The small town of Fayence, just outside of Grasse, is home to the Rosa centifolia, or Rose de Mai. This flower, whose rich and deep fragrance make it the world’s most sought-after rose is also the rarest and most difficult to harvest—it only blossoms once a year within a three-week window.