Kale is a biennial ornamental leafy herb of the Brassicaceae family, a horticultural variety of cabbage. The basal leaves are densely arranged in a rosette shape, with varieties including smooth, crumpled, lobed, and wavy leaves. The veins and petioles are light purple, and the internal leaves display a rich color range including yellow, white, pink, red, rose red, purplish red, light gray, and multicolored. The观赏 period of the leaves is from December to March or April of the following year. The plant height is generally 20-40 cm, with racemes of light yellow flowers. The fruit is a siliqua, with seeds maturing in June, which are black-brown and flattened globular.