Biennials normally reproduce by means of seed but, unlike annuals, they rarely flower and set seed in their first year. The first years growth represents a vegetative phase during which the plant grows and accumulates food reserves followed by flowering and seed production in the second year. After the plant flowers and sets seed it normally dies. The vegetative phase might last more than one year in unfavourable conditions or, conversely, flowering may occur in the first season under favourable conditons. Management methods will be similar to those employed against annual broadleaved weeds.
List of Biennial weeds
Caper spurge |