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B.C. Weed Control Act
Noxious Weeds in BC

Noxious weeds are typically non-native plants that have been introduced to British Columbia without the insect predators and plant pathogens that help keep them in check in their native habitats. For this reason and because of their aggressive growth, these alien plants can be highly destructive, competitive and difficult to control.

The B.C. Weed Control Act imposes a duty on all land occupiers to control designated noxious plants.

The purpose for the Act is to protect our natural resources and industry from the negative impacts of foreign weeds.

The following weeds are classifed as noxious within all regions of British Columbia:

Annual Sowthistle (Sonchus oleraceus)
Canada Thistle (Cirsium arvense)
Crupina (Crupina vulgaris)
Dalmatian Toadflax (Linaria dalmatica)
Diffuse Knapweed (Centaurea diffusa)
Dodder (Cuscuta spp.)
Gorse (Ulex europaeus)
Hound's-tongue (Cynoglossum officinale)
Jointed Goatgrass (Aegilops cylindrica)
Leafy Spurge (Euphorbia esula)
Perennial Sowthistle (Sonchus arvensis)
Purple Nutsedge (Cyperus rotundus)
Rush Skeletonweed (Chondrilla juncea)
Scentless Chamomile (Matricaria maritima)
Spotted Knapweed (Centaurea maculosa)
Tansy Ragwort (Senecio jacobaea)
Velvetleaf (Abutilon theophrasti)
Wild Oats (Avena fatua)
Yellow Nutsedge (Cyperus esculentus)
Yellow Starthistle (Centaurea solstitialis)
Yellow Toadflax (Linaria vulgaris)

The following weeds are classified as noxious within the boundaries of the corresponding regional districts:

BlueweedEchium vulgareCariboo, Central Kootenay, Columbia-Shuswap, East Kootenay, Okanagan-Similkameen, Thompson-Nicola
BurdockArctium spp.Bulkley-Nechako, Cariboo, Columbia-Shuswap, Fraser-Fort George, Kitimat-Stikine, North Okanagan, Okanagan-Similkameen, Peace River, Thompson-Nicola
CleaversGalium aparinePeace River
Common Bugloss Anchusa officinalis Kootenay-Boundary
Common TansyTanacetum vulgareBulkley-Nechako, Central Kootenay, Columbia-Shuswap, East Kootenay, North Okanagan
Field ScabiousKnautia arvensisBulkley-Nechako, Kootenay-Boundary,  Thompson-Nicola
Green FoxtailSetaria viridisPeace River
Hoary Alyssum Berteroa incana Kootenay-Boundary
Hoary CressCardaria spp.Columbia-Shuswap, North Okanagan, Thompson-Nicola
KochiaKochia scopariaPeace River
Marsh Plume Thistle Cirsium palustre Bulkley-Nechako, Fraser-Fort George
Meadow KnapweedCentaurea pratensisColumbia-Shuswap
Night-Flowering CatchflySilene noctifloraPeace River
Orange HawkweedHieracium aurantiacumBulkley-Nechako, Cariboo, Central Kootenay, Columbia-Shuswap, East Kootenay, Thompson-Nicola
Oxeye DaisyChrysanthemum leucanthemumCariboo, North Okanagan, Peace River, Thompson-Nicola
Perennial PepperweedLepidium latifoliumEast Kootenay, Thompson-Nicola
Plumeless ThistleCarduus acanthoidesCentral Kootenay
PuncturevineTribulus terrestrisOkanagan-Similkameen
Purple LoosestrifeLythrum salicariaComox-Strathcona (by regional district bylaw)
QuackgrassAgropyron repensPeace River
Russian KnapweedAcroptilon repensNorth Okanagan
Russian ThistleSalsola kaliPeace River
Scotch ThistleOnopordum acanthiumNorth Okanagan
Sulphur CinquefoilPotentilla rectaColumbia-Shuswap, North-Okanagan, Okanagan-Similkameen, Thompson-Nicola
Tartary BuckwheatFagopyrum tataricumPeace River
White CockleLychnis albaPeace River
Wild ChervilAnthriscus sylvestrisFraser Valley
Wild MustardSinapsis arvensisPeace River

More Information on Noxious Weeds
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