Seed propagation. /kloc-0 occurred in northwest China from the first ten days of May to the first ten days of October, and the occurrence from May to August accounted for more than 90% of the annual occurrence. Mid-May and late August are the two peak periods of seedling emergence. Amaranthus dentatus can complete two life cycles in one year. The first generation germinates in early May, branches in late May, germinates in mid-June, blooms and bears fruit from late June to early July, and matures in middle and late July. The second generation emerged in the first half of August, reached its peak in late August, blossomed in September and died in winter.