Japanese knotweed in the autumn

“Helloweed” - trick or treat time for Japanese knotweed

Trick or treat - don't be fooled, Japanese knotweed is still alive.

It's Halloween again that time of year in the knotweed calendar marking the conclusion of what many people think is the end of the knotweed treatment season. It’s true enough that the knotweed is preparing for its winter dormancy period, where the leaves go yellow and fall, leaving brittle hollow canes, tricking people into thinking the knotweed has at long last died. Of course it’s just disguised as dead, with healthy underground orange rhizomes the colour of pumpkins.