On Sat, 9 Jul 2016 13:38:30 +0100, Janet wrote:

Our local council has been spraying several local colonies of JKW for
several yesrs. You can see the deadly effect every time they treat it,
but the next year it rises from the grave again.

AFAIK, in the UK climate JKW does not propagate by seed; so a
colony's survival after weedkilling is not down to seed germination; it
reflects the depth, extent and vigour of its root systems.

Janet


Apparently JKW is quite tasty. Next spring when it starts to grow I'm
going to try it.

Steve