05 September 2025

Gardenbite: Teasel - An invasive species coming to a roadside near you? | #GoodGrowing

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If you’ve driven along any interstates or highways in Illinois, there’s a good chance you’ve seen tall plants with spiky flower heads. Teasels have become an increasingly common sight across Illinois. While they may appear attractive, especially for cut flower arrangements, these troublesome plants can form large colonies that outcompete and choke out native plants.

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Chris Enroth: cenroth@illinois.edu

Ken Johnson: kjohnso@illinois.edu

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