Organic Weed Killer that works?

[newfsmith]

Full strength and it works best if it's done on a sunny day. Re-apply after any rain until the weed is gone. If regular table vinegar(>5%) doesn't work, you can get a stronger solution of acetic acid(~10%) at gardening centers. Remember to read the directions for it and take the necessary precautions.

Or you can boil the vinegar and pour it on. It works well on our patio between the pavers.