The Invaders: Canada Thistle

Professional Horticulturist and Master Gardener Ellen Nibali identifies the Canada Thistle (cirsium arvense) and explains how to remove this invasive plant from your garden.

Click here to read our publication on invasive species for even more information: http://www.hgic.umd.edu/_media/documents/publications/hg88.pdf


This video is brought to you by the Home and Garden Information Center, part of University of Maryland Extension. Learn about our Grow It Eat It campaign, which provides resources and encourages people to start their own food gardens. http://www.growit.umd.edu/
Check out our facebook page for more gardening advice: http://www.facebook.com/UMDHGIC#!/GIEIMaryland

Intro Credit: "Invasion of the Body Snatchers: (1956); Allied Artists. Music and shot of woman screaming used here in accordance with Fair Use.

Shot and Edited by: Alix Watson and Emily Heimsoth

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[Blbmbr666]

@grannygruntz Try applying a systemic herbicide in the fall. The plant will be sending resources to the roots for overwintering at this time, and the herbicide will be taken with it and severely injure or kill the roots.

[grannygruntz]

*I have an INFESTATION of this thistle in my yard.

*The chemical named was not clear.

*A Master Gardener from Univ. of Illinois stated this thistle is a RUNNER.

*"Pulling up the roots" does not work because the roots are TOO FAR UNDERGROUND.

*The vast number in my yard have been pulled up several times over TO NO AVAIL - THEY KEEP RETURNING & MULTIPLYING

*There is an effective chemical but must be applied individual to each plant.

*I am elderly & physically unable to do so.

*SUGGESTIONS?