West Sussex, United Kingdom
I have a problem weed spreading from a neighbouring garden but cannot identify it. Can anyone help? The green shoots come up on spindly thin white stems that break away easily from a bigger underground root system with tougher brown roots. These stems run horizontally about 12 inches down and will travel quickly under a metre or more of concrete. The shoots will come up anywhere there is the tiniest crack. I have been spraying on a weekly basis for some years but only managed to slow it down a little. Digging it up is not possible when it disappears under a path or building. Spaying only kills the shoots, not the root system. Nobody seem to know what it is.
- 25 May, 2010