Poison hemlock is abundant again this year (though not in bloom yet). Although often seen along roadways, fence rows etc, it has expanded in recent years into grazed pastures and hay fields.
The concern not only comes from its invasive nature, but also because it is one of the most toxic plants in the world.
Poison hemlock is a biennial that reproduces only by seed. It is capable, however, of completing its life cycle as a winter annual if it germinates early during the fall. Flowers and new seed are typically produced in late May and June.