In order to explore the feasibility of double-cropping A rtemisia annua L., the developmental characteristics of A rtemisia annua L. in different sowing periods were studied. The results show that the A rtemisia annua L. could sow in spring, summer and autumn. The A rtemisia annua L. sowed in spring or autumn will differentiate flower buds in late August and the Artemisia annua L. sowed in summer will differentiate flower buds in middle September. The vigorous vegetative period of Artemisia annua L. sowed in spring and summer was in early June and early August, respectively, but their leaf yie...