Yarrow

Question

How do you get rid of yarrow in a lawn? It is the variety that grows on roadsides all over NW Tasmania. I have been using Round-up, which seems to kill it, but next season it is back again. Thank you for your help.

Answer 1

Common yarrow can be quite invasive and difficult to control. They spread through roots, which is why you have been having some issues with controlling it with Round-up. It just does not get deep enough with a surface application. This is 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.