Nikki
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on April 30, 2014
Common yarrow can be quite invasive and difficult to control. They spread through roots, making it a plant that needs to be dug up. I would recommend digging up as much as you can, then applying either Round-up or boiling water to the area where it was, to kill off any of the remaining roots. Be aware that both Round-up and boiling water will kill whatever plant growth it touches.
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