Noxious Weeds

Interim Coordinator: Joseph Shea
Skagit County Noxious Weed List
Download the weed list here.

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It's the duty of every owner of land to control and prevent the spread of noxious weeds within and from the owner's property. (RCW 17.10.140)

Contact the Noxious Weed Office for more info.

Interim Coordinator: Joseph Shea
Hours: 7:30 a.m. - 4:30 p.m
Skagit County Noxious Weed Control Board
1800 Continental Pl.
Mount Vernon, WA 98273-5625

Office (360) 416-1467
Cell (360)-770-2694
Email: jshea@co.skagit.wa.us

Weed images : Washington State Weed Control Board

Class A Weeds:
Non-native species whose distribution in Washington is still limited. Preventing new infestations and eradicating existing infestations are the highest priority. Eradication of all Class A plants is required by law.

Class B Weeds: 
Non-native species presently limited to portions of the State. Species are designated for control in regions where they are not yet widespread. Preventing new infestations in these areas is a high priority. In regions where a Class B species is already abundant, control is decided at the local level, with containment as the primary goal. Please contact your Weed District Coordinator to learn which species are designated in your area.

Class C Weeds:
Noxious weeds that are typically widespread in WA or are of special interest to the state’s agricultural industry. The Class C status allows counties to require control if locally desired. Other counties may choose to provide education or technical consultation.

  Printable Weed List
Class A Weeds where control is required:
common crupina Crupina vulgaris
cordgrass, common Spartina anglica
cordgrass, dense-flowered Spartina densiflora
cordgrass, saltmeadow Spartina patens
cordgrass, smooth Spartina alterniflora
dyer’s woad Isatis tinctoria
eggleaf spurge Euphorbia oblongata
false brome Brachypodium sylvaticum
floating primrose-willow Ludwigia peploides
flowering rush Butomus umbellatus
French broom Genista monspessulana
garlic mustard Alliaria petiolata
giant hogweed Heracleum mantegazzianum
goatsrue Galega officinalis
hydrilla Hydrilla verticillata
Johnsongrass Sorghum halepense
knapweed, bighead Centaurea macrocephala
knapweed, Vochin Centaurea nigrescens
kudzu Pueraria montana var. lobata
meadow clary Salvia pratensis
oriental clematis Clematis orientalis
purple starthistle Centaurea calcitrapa
reed sweetgrass Glyceria maxima
ricefield bulrush Schoenoplectus mucronatus
sage, clary Salvia sclarea
sage, Mediterranean Salvia aethiopis
silverleaf nightshade Solanum elaeagnifolium
Spanish broom Spartium junceum
spurge flax Thymelaea passerina
Syrian beancaper Zygophyllum fabago
Texas blueweed Helianthus ciliaris
thistle, Italian Carduus pycnocephalus
thistle, milk Silybum marianum
thistle, slenderflower Carduus tenuiflorus
variable-leaf milfoil Myriophyllum heterophyllum
wild four-o'clock Mirabilis nyctaginea
Class B Weeds where control is not required
butterfly bush Buddleja davidii
common fennel, (except bulbing fennel) Foeniculum vulgare (except F. vulgare var. azoricum)
Eurasian watermilfoil Myriophyllum spicatum
hawkweeds: All nonnative species and hybrids of the wall subgenus Hieracium, subgenus Hieracium
herb-Robert Geranium  robertianum
knotweed, Bohemian Polygonum x bohemicum
lesser celandine Ficaria verna
loosestrife, purple Lythrum salicaria
loosestrife, wand Lythrum virgatum
Ravenna grass Saccharum ravennae
Class B-Designated Weeds where control is required:
blueweed Echium vulgare
Brazilian elodea Egeria densa
bugloss, annual Anchusa arvensis
bugloss, common Anchusa officinalis
camelthorn Alhagi maurorum
common reed (nonnative genotypes only) Phragmites australis
Dalmatian toadflax Linaria dalmatica ssp. dalmatica
fanwort Cabomba caroliniana
gorse Ulex europaeus
grass-leaved arrowhead Sagittaria graminea
hairy willowherb Epilobium hirsutum
hawkweed oxtongue Picris hieracioides
hawkweed, orange Hieracium aurantiacum
hawkweeds: All nonnative species and hybrids of the meadow subgenus Hieracium, subgenus Pilosella
hoary alyssum Berteroa incana
houndstongue Cynoglossum officinale
indigobush Amorpha fruticosa
knapweed, black Centaurea nigra
knapweed, brown Centaurea jacea
knapweed, diffuse Centaurea diffusa
knapweed, meadow Centaurea x moncktonii
knapweed, Russian Acroptilon repens
knapweed, spotted Centaurea stoebe
knotweed, giant Polygonum sachalinense
knotweed, Himalayan Polygonum polystachyum
kochia Kochia scoparia
loosestrife, garden Lysimachia vulgaris
parrotfeather Myriophyllum aquaticum
perennial pepperweed Lepidium latifolium
policeman’s helmet Impatiens glandulifera
puncturevine Tribulus terrestris
rush skeletonweed Chondrilla juncea
saltcedar Tamarix ramosissima
shiny geranium Geranium lucidum
spurge laurel Daphne laureola
spurge, leafy Euphorbia esula
spurge, myrtle Euphorbia myrsinites
sulfur cinquefoil Potentilla recta
thistle, musk Carduus nutans
thistle, plumeless Carduus acanthoides
thistle, Scotch Onopordum acanthium
velvetleaf Abutilon theophrasti
water primrose Ludwigia hexapetala
white bryony Bryonia alba
wild chervil  Anthriscus sylvestris
yellow archangel Lamiastrum galeobdolon
yellow floatingheart Nymphoides peltata
yellow starthistle Centaurea solstitialis
Class B Weeds
Selected for control by The Skagit County Noxious Weed Control Board:
yellow nutsedge Cyperus esculentus
knotweed, Japanese Polygonum cuspidatum
poison hemlock Conium maculatum
Scotch broom Cytisus scoparius
tansy ragwort Senecio jacobaea
Class C Weeds
Selected for control by The Skagit County Noxious Weed Control Board:
common tansy Tanacetum vulgare
common teasel Dipsacus fullonum
field bindweed Convolvulus arvensis
thistle, bull Cirsium vulgare
thistle, Canada Cirsium arvense
wild carrot (except where commercially grown) Daucus carota
Class C Weeds where control is not required
absinth wormwood Artemisia absinthium
Austrian fieldcress Rorippa austriaca
babysbreath Gypsophila paniculata
black henbane Hyoscyamus niger
blackgrass Alopecurus myosuroides
buffalobur Solanum rostratum
cereal rye Secale cereale
common barberry Berberis vulgaris
common catsear Hypochaeris radicata
common groundsel Senecio vulgaris
common St. Johnswort Hypericum perforatum
curlyleaf pondweed Potamogeton crispus
English hawthorn Crataegus monogyna
English ivy - four cultivars only Hedera helix 'Baltica’,  'Pittsburgh', and 'Star'; H. hibernica 'Hibernica'
evergreen blackberry Rubus laciniatus
fragrant waterlily Nymphaea odorata
hairy whitetop Lepidium appelianum
Himalayan blackberry Rubus armeniacus
hoary cress Lepidium draba
Italian arum Arum italicum
Japanese eelgrass Zostera japonica
jointed goatgrass Aegilops cylindrica
jubata grass Cortaderia jubata
lawnweed Soliva sessilis
longspine sandbur Cenchrus longispinus
medusahead Taeniatherum caput-medusae
nonnative cattail species and hybrids Typha spp.
old man's beard Clematis vitalba
oxeye daisy Leucanthemum vulgare
pampas grass Cortaderia selloana
perennial sowthistle Sonchus arvensis ssp. arvensis
reed canarygrass Phalaris arundinacea
Russian olive Elaeagnus angustifolia
scentless mayweed Matricaria perforata
smoothseed alfalfa dodder Cuscuta approximata
spikeweed Centromadia pungens.
spiny cocklebur Xanthium spinosum
Swainsonpea Sphaerophysa salsula
tree-of-heaven Ailanthus altissima
ventenata Ventenata dubia
white cockle Silene latifolia ssp. alba
yellowflag iris Iris pseudacorus
yellow toadflax Linaria vulgaris





 

To learn more about noxious weeds and noxious weed control in Skagit County, please contact:

Skagit County
Noxious Weed Control Board

1800 Continental Place
Mount Vernon, WA
98273-5625
(360) 416-1467

Email:  jshea@co.skagit.wa.us

Or

Washington State
Noxious Weed Control Board

P.O. Box 42560
Olympia, WA  98504
(360) 725-5764

Or
Washington State
Department of Agriculture

 21 North First Avenue #103
Yakima, WA  98902
(509) 249-6973

 

Please help protect Skagit’s economy and environment from noxious weeds!