Poison hemlock, Conium maculatum - Pest Tracker - CAPS Services

Steve Dewey, Utah State University, Bugwood.org

Poison hemlock
Conium maculatum

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

Idaho Illinois Indiana Minnesota Nevada Ohio Oregon Pennsylvania Utah West Virginia Wisconsin Wyoming

News

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

12/04/2019 - Nature News: Brew up some Eastern hemlock tea to warm up

09/17/2019 - AmeriCorps plays central role in controlling noxious weeds

09/05/2019 - Two Non-Native Weeds Threaten Root River Through SE MN

07/11/2019 - Invasive poison hemlock a growing concern on Vancouver Island

07/09/2019 - Poison hemlock and wild parsnip thriving in southern Ohio

07/09/2019 - Poison hemlock, a toxic, invasive plant, is popping up more an...

07/09/2019 - Poisonous plant found along the Greenbelt trail

07/09/2019 - Wild Parsnip, Poison Hemlock on the rise in Ohio: What to watc...

06/20/2019 - Got noxious weeds? In Seattle metro, there's an app for that

06/19/2019 - Weeds taking over landscape

06/17/2019 - Local experts talk about invasive species

06/07/2019 - Poison hemlock may look harmless, but it's actually deadly: Wh...

06/06/2019 - Poison hemlock in peak bloom, spreading throughout Pennsylvania

06/06/2019 - Tips to stay safe as poison hemlock blooms in Central PA

06/05/2019 - Help for gardeners: What to do with hemlock?

06/05/2019 - Poison hemlock in peak bloom, spreading throughout Pennsylvania

06/03/2019 - Poison Hemlock now present in Idaho

05/15/2019 - Deadly poison hemlock found growing near Killian sports fields

05/08/2019 - Noxious weeds continue to spread across Minnesota

05/08/2019 - Super bloom coincides with super invasive species boom

05/08/2019 - Volunteers pull 80 pounds of poison hemlock from Fuji Park, se...

11/30/2018 - 6 Plants In Idaho That Want To Kill You

09/20/2018 - Watch out for poison hemlock

08/23/2018 - Poison lurks beneath the petals of some Shuswap plants

07/30/2018 - Officials urge control, prevention of poison hemlock, spotted ...

07/23/2018 - Giant hogweed, wild parsnip and other dangerous plants to avoid

07/23/2018 - What you need to know about poison hemlock

05/03/2018 - Beware of poison hemlock

08/10/2017 - Japanese knotweed threatens to invade parking lot in Bracebridge

08/03/2017 - It was Socrates’ undoing, and it’s all over the coast

08/01/2017 - To Every Weed There Is a Season

03/01/2016 - Late winter scouting can help battle a poisonous weed - Farm a...

06/09/2015 - Poison hemlock exploding across Lancaster County - LancasterOn...

05/29/2015 - Spring is poison-hemlock danger time in Western Washington - C...

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