hogweed is an invasive species with broad leaves and a dense canopy
that can out-compete the growth of many native species.
hogweed also poses a serious health risk since its stalks, leaves and
bristles contain a noxious sap that sensitize skin to sunlight.
Giant hogweed has been reported in the NVCA watershed in the
towns of Collingwood, Mono, New Tecumseth and Wasaga Beach and the
townships of Adjala-Tosorontio, Clearview and Essa. Giant Hogweed Fact Sheet.pdf