With its ruffled leaves drenched in pinks, purples, and reds, flowering kale is a decorative and easy-to-grow addition to container gardens and garden beds. Also called ornamental cabbage, flowering kale is in the same plant family as edible cabbage, cauliflower, and broccoli. Flowering kale is edible, but a bitter flavor means leaves are usually reserved as culinary garnishes, not as food. It thrives in cool weather, often taking center stage in the garden during spring and fall. It will tolerate light frost with ease, keeping its good looks through winter in Zones 8 and above.