Vinegar as Weed Whacker
Having problems with wily weeds? Use full-strength vinegar. Just put the vinegar in a sprayer bottle and make sure you thoroughly saturate them.
Vinegar is not only inexpensive but also is safe to use around pets and in the environment. Normally, my weeds will die within 2 days to 2 weeks, depending on how old they are.
Unless you want to kill the surrounding grass too, be careful, because vinegar will make your grass shrivel up and die too!
Oh, and an added bonus for using vinegar outdoors? Ants hate the stuff. So spill a little bit outside your door too, and they will not cross that line into your home.