said by Juggernaut:
Hot tar them, after a weed pull, and kill.
A shot of Pramitol 25E will burn down the weeds as well as provide residual which will remain effective for up to a year on bare ground and much longer when protected. It works through foliage and root contact. Once covered with tar, stuff won't grow back for a good long time. Do not get it on any plant you don't want dead. I know for sure it can be had in Manitoba but not sure about all Provinces.--