With dazzling, sky-blue flowers, 'Blue Boy' is wonderful in mass, and because it is drought tolerant, it's practically care free. Flowers can be used dried or fresh cut, while the edible petals make a colorful garnish to salads, crudités platters, or dinner plates. Also known as cornflower, bachelor's button will "naturalize", or self-sow, for another crop of blue flowers next year.