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Invasive Species Control

Here are some good resources to help manage the most common invasive plants found in McHenry County.

If there are additional species that you think should be included, email [email protected]

Poison Hemlock

Photo credit: k2018lena, iNaturalist

Poison Hemlock – Illinois Wildflowers

Canada thistle blossom 7 17


parsnip flowering and forming seed 7 17

Wild Parsnip

Photo credit: Mary Crickmore, iNaturalist

INHS Wild Parsnip

WDNR Parsnip Brochure

WDNR Wild Parsnip Fact Sheet