If you have other weeds in your yard in addition to corn speedwell, consider an herbicide product that attacks both. To find out the best approach, take a look at 30 common weeds and how to ...

It contains triclopyr, an active ingredient that works wonders on eradicating broadleaf weeds like chickweed, clover, oxalis, ground ivy, speedwell ... i.e., a weed preventer. For best results ...

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).