Actually, a spritz of pure white, undiluted vinegar will work on many (but
not all) broad leaved weeds. It works best in full sun, and again, if the
weed's leaves do not have a large surface area you might not kill it.

Dave

"Chelsea Christenson" wrote in message
...
My master gardener suggested a solution of vinegar and water for
killing the weeds that come up between the bricks in my patio.
Unfortunately, she's on vacation now, so I can't ask her: what is the
correct ratio of vinegar to water?