[Growster...]

I don't think it can spread on the wind, but I know it's roots can travel forever underground then pop up somewhere!
[/quote]

I think you're right Granny. I just think 'Giant couch grass', and treat it the same way, i.e. with a full frontal assault with everything there is physically and chemically to bash the stuff these days!

Amazing to think that this stuff was introduced as a culinary delicacy once...

I heard a question on GQT once, where an 'unfortunate' lady had a problem with an outbreak of JKW among the roots of some 40' Leylandii!

Hmmm - must have been a plant...