On Sat, 17 Mar 2012 22:27:48 +0000, Spider wrote:

Looks like Ground Elder, a very invasive weed. Just a tiny fragment of
root left in the ground will lead to reinfestation. You need to take it
all out.

For U.S. military values of 'take it out'

Glyphosate, glyphosate and yet more glyphosate throughout the growing
season.