Poison Hemlock, Cow Parsnip, Queen Anne’s Lace, Oh my! Join Sabrina Schirtzinger, Agriculture and Natural Resources Educator at the OSU Extension Office, to learn the differences between these plants and how to safely control them. Poison hemlock is invasive and highly toxic. Populations have exploded in Knox County over the last few years. We will start inside to learn about these plants, and then move outside for some practical identification. Meet in the BFEC Resource Center.