The kale flower stems are green, upright and thick, with waxy powder on the skin and crisp and tender texture. They are the main edible part. The leaves of kale are oval or long ovate, with wax powder; the leaves are green or gray-green, the leaves are flat or wrinkled, and some leaves have ear-shaped lobes at the base. The leaves are also edible and have a refreshing taste; kale is Cross-pollinated plants, insect-pollinated flowers, inflorescences are compound racemes, flowers are white or yellow.

The taproot of kale is underdeveloped and the root system is shallowly distributed, mainly distributed in 20 cm of topsoil, so it is not drought-tolerant. However, it has more fibrous roots and strong root regeneration ability, so it is more suitable for transplanting.

Kae Lan likes a mild and cool climate and is intolerant of heat and cold. It is suitable for cultivation in spring and autumn. Late-maturing and late-flowering varieties are needed in spring, and early-maturing varieties can be selected in autumn.