A unique European variety bred specifically for culinary use. The name is derived from its wonderful steel-blue leaves with purplish undersides. The flowers themselves are also edible and their bright-red hue makes an attractive addition to salads, as well as being perfect for garnishing stir fries. The leaves have a slightly peppery taste, reminiscent of watercress. The flavour becomes spicier when the flowers are grown in sunnier, hotter weather.