After the wilting of the above ground until the underground rhizome sprouting can be planted, Southwest Eurasia and other places in the middle and end of November to the following February. In this period, early planting is better than late planting. Spring sprouting when planting, poor growth, the growth of underground stems in the year is small, the growth of flower shoots is also less. If planted in November, the following year, the growth of shoots and shoots, can harvest a certain yield.