A biennial is a plant the begins to grow from seed in one year
and usually produces what is called a rosette of foliage. It
over-winters as a plant and then begins to grow again the
following spring. Later it sets flowers, blooms, sets seeds and
then dies. Thus, it lives for just two years.
Here are the common genera of ornamental
biennials found in home
landscapes in the temperate zones of North America: