Sunflowers usually take two months from sowing to flowering, and the most indispensable things in the growth process are water and sunshine. Before the sunflower blooms, its Hua Lun will always follow the sun, hence the name sunflower. But after the sunflower blooms, its Hua Lun will not rotate with the sun.

Sunflowers in China are divided into ornamental and edible according to their uses, among which edible sunflower seeds are important oil crops in China.