The only thing I've found to get rid of ground elder. Ideally, dig up the plants you want, spray when the leaves are big enough to take up the glyphosate (Roundup). I then covered the area with a weed suppressing membrane and mulch for a couple of seasons. There are still some that come through, but it's a lot more manageable. The WSM has gone now, as it's easier to plant into the ground.
Good luck!
Replied: Friday 20th of March 2009 08:16 PM