Edible blue flowered vining plant native to Southeast Asia. Gorgeous, huge, double blue blooms make a natural food dye and soothing tea to calm the nerves. This double flowered type was found in Thailand, where the blooms are used to dye everything from teas to rice and desserts. A gorgeous ornamental edible flower, the vines are smothered in dazzling indigo petals. Our favorite kid-friendly drink; when you add a drop of lemon to the deep blue tea, the color instantly turns a bright pink, like magic! Natural Pink Lemonade, anyone? Some plants may produce single blooms.