Annual. How surprised your family and friends will be when served a salad adorned with the beautiful blossoms of Peach Melba! Also called Peach Melba Wina. Nasturtium flowers and leaves taste a bit peppery like watercress, adding a kick of flavor and color to salads. The plants are known to deter rabbits and other pests, and may be grown as perennials in warm climates.