"The most effective way to kill it without encouraging it to spread." Homeowner discovers 'demon' plant in yard: 'Why would anyone actually plant these?' first appeared on The Cool Down.

But don't use just any broadleaf herbicide. Look for one that contains triclopyr. You often find this herbicide formulated ...

The herbicide treatments were glyphosate, glyphosate and metsulfuron-methyl, triclopyr, and triclopyr and metsulfuron-methyl. Metsulfuron-methyl has some soil activity, so there was concern about ...

They tolerate almost all hormone herbicides (MCPA, 2,4-D, clopyralid, dicamba, triclopyr, picloram), and speedwells are about the only weeds which survive a triclopyr/picloram mixture (Victory Gold).