Indeed, this is the way to go (RoundUp=glyphosate). It only kills the
plant(s) you put it on and doesn't leach into the ground to affect the roots
of desirable plants.

Suzy O, Zone 5, Wisconsin

wrote in message
oups.com...
Check the back of the label for the active ingredient. If it has
glyphosate in it(roundup) then it will take a few days to notice
discoloration , then a few more to completley kill. Hot weather speeds
it up quite a bit. Glyphosate does not affect woody stems, branches or
bark. The stuff with the warning on it has 2-4d in it, which will harm
woody roots.