Posted: 24/11/2011 at 15:29
I note from http://www.phlorum.com/identify-japanese-knotweed.html there's a cross between JK and its Giant brother that CAN set seed....? I'm a bit concerned about this:my current problem has what look like seeds on the dead flower heads?
Is it really a good idea to dig it out if a fragment of the rhizome can persist in the soil and regenerate even after 20 years? See . http://www.environment-agency.gov.uk/homeandleisure/wildlife/130079.aspx#How_to_control_Japanese_knotweed