From what I understand, this plant needs to be removed. I'm not sure on the protocol here, do I leave it to the volunteer group that looks after Bruce ridge, should I contact someone, or can I just go up there again with a shovel?
Best time to control is in spring using herbicide - metsulfuron methyl. It has a large rhizome-like root system - so if dug out this must be removed. Job has been added to ACT Parks - Invasive Plants Program for spring.