Register today! learn more »

Free e-learning

Take the course today! learn more »

Japanese beetle is in Vancouver

You can help stop the spread! learn more »

Click here to learn more »

Parrot's Feather

A popular aquatic garden plant that spreads with water currents, animals, boats/trailers and fishing gear. Dense stands can stagnate water, and increase breeding grounds for mosquitoes learn more »

Zebra/Quagga Mussels

These tiny freshwater mussels clog drains, damage infrastructure, and are very costly to control/eradicate learn more »

Giant Hogweed

A towering toxic invasive plant with WorkSafe BC regulations learn more »

Purple Loosestrife

An aggressive wetland invader that threatens plant and animal diversity learn more »

Orange Hawkweed

Also yellow, these invasive plants replace native vegetation along roadsides, and threaten areas not yet reforested learn more »

Japanese Knotweed

Grows aggressively through concrete, impacting roads and house foundations learn more »

Spotted Knapweed

A single plant spreads rapidly with up to 140,000 seeds per square metre learn more »

Scotch Broom

An evergreen shrub that invades rangelands, replaces forage plants, causes allergies in people, and is a serious competitor to conifer seedlings learn more »

Perennial Pepperweed

Lepidium latifolium

Perennial Pepperweed (Lepidium latifolium) is an invader of irrigated pastures, grasslands, rangelands and native meadows, causing the most concern in the Kootenay and Thompson agricultural regions. Plants can grow to 2 m high, with large infestations that can eliminate competing vegetation and damage riverbank habitats. 

Perennial pepperweed has a deep, extensively creeping root system, with broken pieces that can travel and lead to more monocultures along roadsides, in fields, and in disturbed habitats. It is common on riverbanks, beaches, marshy floodplains, and seasonally wet areas. It is also a prolific seed producer; one plant can spread over 6 billion seeds per acre, dropping from the plant or travelling short distances by wind and water. 

Considered regionally noxious under the BC Weed Control Act, perennial pepperweed is identified by waxy foliage and rounded clusters of white flowers at the end of branches. Leaves are green or greyish-green, with distinctive white veins at their centre. Perennial pepperweed seeds were likely brought to North America mixed with a shipment of sugar beet seeds in the 1930s.

Gallery: Pepperweed