Exotic Pest Reporting
Steve Dewey, Utah State University, Bugwood.org
Poison hemlock (Conium maculatum) is an invasive plant. It is a native of Europe, Asia and Africa and was first detected in West Virginia in 1939.
Poison hemlock is a tall biennial. It has leaves and white flowerheads resembling those of parsnips, carrots, and water hemlock. All parts of poison hemlock are poisonous. Poison hemlock commonly occurs in sizable stands of dense, rank growth along roadsides, field margins, ditchbanks and in low-lying waste areas. Once it is firmly established under such conditions, hemlock can preclude most other vegetation and established pastures.
Summaries of State Plant Protection Laws and Regulations
05/01/2020 - Poison Hemlock
03/04/2020 - Livestock producers should watch for poison hemlock
01/21/2020 - Poison hemlock confirmed in two Minnesota counties
01/15/2020 - Two noxious weeds spread to Rice County
01/03/2020 - Warning over poisonous hemlock as dog is put down
07/09/2019 - Poisonous plant found along the Greenbelt trail
06/19/2019 - Weeds taking over landscape
06/17/2019 - Local experts talk about invasive species
06/05/2019 - Help for gardeners: What to do with hemlock?
06/03/2019 - Poison Hemlock now present in Idaho
05/08/2019 - Noxious weeds continue to spread across Minnesota
11/30/2018 - 6 Plants In Idaho That Want To Kill You
09/20/2018 - Watch out for poison hemlock
07/23/2018 - What you need to know about poison hemlock
05/03/2018 - Beware of poison hemlock
08/01/2017 - To Every Weed There Is a Season