Kale, also called leaf cabbage, belongs to a group of cabbage cultivars primarily grown for their edible leaves. It has also been used as an ornamental plant.

Brassica oleracea is a plant species from family Brassicaceae that includes many common cultivars used as vegetables, such as cabbage, broccoli, cauliflower, kale, Brussels sprouts, collard greens, Savoy cabbage, kohlrabi, and gai lan.