Resistant weed in my flower beds

Asked July 11, 2020, 8:59 PM EDT

This leafy weed has been persistent and spreading in my flower beds for more than 10 years. What is an effective treatment to eradicate it. Photo attached,

Howard County Maryland

1 Response

This looks like Canada thistle, an invasive perennial broadleaf weed.
The easiest option may be to cut the thistle at the base to exhaust the root system. This effort will have to be repeated.
If possible, another option is to paint the thistle with a paintbrush using a nonselective herbicide containing glyphosate. Do not let it touch your desirable plants as this kills everything. See more resources on our web page http://extension.umd.edu/hgic/topics/canada-thistle

Marian