An annual or winter annual that reproduces by seeds. The first flush develops as annuals and the second develops as winter annuals.
Sporadic emergence occurs at other times.
Flowers Annuals flower from early July through August. Seeds from annuals mature from early August through fall. Seeds exhibit little or no dormancy, losing their ability to germinate after about five years. The most serious infestations of this weed occur in weak crop stands. Management Strategy Prevent seed production and encourage strong crop stands.