Depending on how small or large the area is, if you can you might want to buy some sort of landscape fabric or something that would smother them/burn them up. I used black fabric to control the weeds in my garden, you just have to make sure to keep it there for the season.

This 'infestation' is about one acre with all three areas combined. I must see the weed fall and lose potency before flowering. Roots defy the max strength and time. First experience with be with cider vinegar/homemade potion.
cella jane