On Wed, 19 Jun 2013 08:57:27 +0100, Jeff Layman wrote:

Is it only in your garden, or is it coming from next door? If the
latter, you will never be free of it unless your neighbour's ground
elder is also treated with weedkiller.

That depends on how much there is next door. Glyphosate will take out
the plant for a several feet from (repeated) apllication point but
that's about all. If half the garden next door has you'll just have
to fire fight as it comes back or get co-operation from neighbour to
erradicate it there as well.

Digging will never get rid of it as there will always be a bit of
root left. Glyphosate two or perhaps three times a year will get rid
of it in a year or three.

--
Cheers
Dave.