Bionic Weed - Wont Die
Good Afternoon, I ve included a pic of a weed that's in one side of my Mulch bed. They multiply very quickly.I've tried to kill them with Ortho,RM43,Gas. anything I can think of but they wont die and keep coming back. Now I just dig them up. NOBODY has been able to rid them. Any help would be appreciated.Thank you
Prince George's County Maryland
This is Canada thistle. It is a non-native invasive plant and it is very difficult to get rid of. Pulling will not dent it. Never till a bed of it, because each tiny piece can generate a new plant.
Here is our webpage on Canada thistle: http://extension.umd.edu/hgic/canada-thistle Be sure to use the links provided to get information on control options.
If you dig these plants, you must get every bit of root. If you spray with a systemic herbicide containing the ingredient glyphosate, that can kill the roots, but that product is also a total vegetation killer and you must shield your desirable plants from any contact from the herbicide. Expect to spray more than once. Timing is crucial. Read the link information carefully.