08-01-2011, 11:52 AM
The fellow who did some landscaping for us recently has a call in talk show on our local station. I recently heard him tell a caller that vinegar with greater than 10% concentration is a good, safe weed killer. If you do a Google search you will find lots of references. This one says concentrations of 5% will work.
http://www.ehow.com/how_4762568_make-wee...negar.html
http://www.ehow.com/how_4762568_make-wee...negar.html