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岷归成药期属营养生长阶段,从定植到收获约200天。前期由于气温低,幼苗生长缓慢,7月中旬后生长速度加快,9月上旬地上部鲜重达到最大值。岷归根鲜重增长在8月上旬以后加快,直到10月上旬,为持续快速增重期。气温17～7℃、土温17～13℃、降雨量420mm以上,是岷归成药期的最适气候条件。
Zigui is a vegetative phase during the period from planting to harvesting about 200 days. In the early period, due to the low temperature, the growth of seedlings was slow, and after the middle of July, the growth rate accelerated, and the aboveground fresh weight reached its maximum in early September. The growth of fresh roots in Suiguo County accelerated after the beginning of August and continued until early October. Temperature 17 ~ 7 °C, soil temperature 17 ~ 13 °C, rainfall of 420mm or more, is the best climate conditions in the period of returning to medicine.