I'm trying to get rid of a large (and getting larger) patch of Bishop's Weed
along the back of my perennial bed. I've tried using Roundup but haven't had
much success. I guess at this point I'm thinking of digging it out as it
pops it's nasty little head through the earth and then camping out next
summer with a gallon of Roundup. It's a shame...I really love the flower but
it's worn out it's welcome.

Anyone have any ideas on how to get rid of this stuff...without killing
everything else!