If Artemisia annua is used as medicine, it should be eaten with the roots. It is better to eat it steamed without the roots.

Artemisia annua is a perennial rachis-rooted small semi-shrub. It turns green early in spring and grows quickly. It starts growing from mid-March to April, blooms in mid-August, bears fruit in early September, and matures in early October. The root system is well developed. Under normal conditions of pasture utilization, the main root can extend into the soil layer of 100 cm. There are many lateral roots and adventitious roots, which are concentrated in the soil layer within 30 cm. The depth of the root system in the soil exceeds 4 to 5 times the plant height, and the root width is 2 to 3 times greater than the crown width. Over-exploitation, the degree of drought in the habitat intensifies, the underground part of the plant is 10 to 20 times the height of the plant, the role of the main root is weakened, adventitious roots appear in large numbers, and even develop to the point where adventitious roots replace the main root.