Houtiyana, Bishops Weed, Heartlead, EVIL!
We moved into a house last year which had a patch of this in an enclosed area. I spent three days digging, sifting, digging it out and planted a rock garden.
This summer it is back with a vengeance. For the first few weeks I have been digging out what I can and RoundUp-ing the rest. Now it is growing up under my other plants and spreading into a patch of lawn. It Just. Keeps. Growing. Back.
HELP! What do I do?