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Dec
18

Weed publications

Publications about noxious weeds in King County, Washington.

Organized by general materials, guides for individual species as available, and translated materials. Most of our brochures and publications are available for download from the links listed below. If you would like printed copies of any of our booklets or brochures, please email us at noxious.weeds@kingcounty.gov or call us at 206-477-WEED (206-477-9333) and we can send you what you need.

All of our available English publications except those for individual species. For materials on individual species, select the “A to Z by weed name” tab above. All linked materials are in PDF format.

Pocket-size field guide to 29 noxious weeds found in King County, Washington. Photos, impacts, regulation status, and methods of control are listed for each weed. This publication also includes a brief introduction to our program, noxious weeds, weed laws, and landowner responsibilities. Last revised in 2019.

The official King County Noxious Weed List. Weeds are listed within their respective class groupings alphabetically by common name. This list names every weed species by common and scientific name, indicates its classification/regulatory status, and notes if the species is present in King County, Washington. Any recent changes or updates are noted in the footnote section at the end.

Identical to the A to Z by common name document except species are listed within their respective class groupings alphabetically by scientific name.

Brochure of the Washington State Prohibited Plants List. This publication lists the regulated plant species that cannot be sold, bought, distributed, transported, or propagated in the state of Washington. This list of species is both regulated and put out by the Washington State Department of Agriculture (WSDA). This list is different from the noxious weed list, though there is overlap.

18-page booklet which offers several non-invasive alternatives for 17 invasive ornamental and noxious weeds in Western Washington. This publication was produced by the WA State Noxious Weed Control Board in collaboration with the Washington Invasive Species Coalition and the Washington State Nursery and Landscape Association.

Kid and adult friendly coloring book of 8 different noxious weeds. Each page includes a hand drawn coloring page and information about the species. Art by one of our own (now retired) long time noxious weed specialist, Karen Peterson.

58-page booklet about toxic noxious weeds and other plants that are toxic to horses, livestock, and even chickens. It includes sections on: plant toxicity; integrated pest management for pastures; identification, symptomology, actions to take if you suspect toxic plant exposure, and control of over 21 toxic plant species, and choosing hay.

29-page booklet on aquatic weeds found in King County, Washington. 18 individual species pages organized by growth habit (under, atop, or near the water) includes photos, identification tips, impacts, habitat, control methods, look-alikes, and legal status for each species. This publication also includes an introduction on aquatic plants, permitting, control requirements, and other resources.

A technical guide to noxious weed regulation in King County Washington. This document looks in-depth at the regulation and understanding of noxious weed laws, pesticide laws, and noxious weeds in aquatic and other critical areas.

Publications by weed common name or group. Fact Sheets can be printed as a single sheet, double-sided. Best Management Practices are longer and go into more detail about species impacts and control considerations. Please note some publications have outdated names, please refer to the listed name as the most up to date name.

If you can’t find the plant you’re looking for, it may not have a printable publication yet. Find its individual webpage listed by common or scientific name on our homepage for more information on that species. If you can’t find it there, that means it is most likely not a listed noxious weed in King County and we do not have information on that species.

Sorted by common name

Bindweed (Convolvulus, Calystegia)

Bittersweet nightshade (Solanum dulcamara)

Blackberry (Rubus spp.)

Brooms (Cytisus, Spartium)

Buffalobur (Solanum rostratum)

Buttercup (Ranunculus spp.)

Butterfly bush (Buddleia davidii)

Common holly (Ilex aquifolium)

Common reed/Phragmites (Phragmites australis)

Egeria (Egeria densa)

Fragrant water lily (Nymphaea odorata)

Garlic mustard (Alliaria petiolata)

Giant hogweed (Heracleum mantegazzianum)

Goatsrue (Galega officinalis)

Gorse (Ulex europaeus)

Hairy willowherb (Epilobium hirsutum)

Hawkweeds (Hieracium spp.)

Herb Robert (Geranium robertianum)

Houndstongue (Cynoglossum officinale)

Ivy (Hedera helix)

Knapweeds (Centaurea spp.)

Knotweeds (Fallopia spp. (formerly Polygonum), Persicaria spp.)

Loosestrifes (Lysimachia, Lythrum)

Milfoils (Myriophyllum spp.)

Old man's beard (Clematis vitalba)

Parrotfeather (Myriophyllum aquaticum)

Perennial pepperweed (Lepidium latifolium)

Poison hemlock (Conium maculatum)

Policeman's helmet (Impatiens glandulifera)

Reed canarygrass (Phalaris arundinacea)

Reed sweetgrass (Glyceria maxima)

Shiny geranium (Geranium lucidum)

Sulfur cinquefoil (Potentilla recta)

(Common) Tansy (Tanacetum vulgare)

Tansy ragwort (Jacobaea vulgaris (formerly Senecio jacobaea))

Thistles (Cirsium, Silybum)

Toadflax (Linaria dalmatica ssp. dalmatica)

Velvetleaf (Abutilon theophrasti)

Wild chervil (Anthriscus sylvestris)

Yellow archangel (Lamiastrum galeobdolon)

Yellow flag iris (Iris pseudacorus)

These documents have been translated by a human translator

Use these links to view the available documents in these languages:


These are all the available multilingual publications that we have. If there is a publication from another tab that you are interested in having in another language, send us a request naming the publication and preferred language to noxious.weeds@kingcounty.gov.

አማርኛ ቋንቋ (Amharic)

اللغة العربية (Arabic)

中文: 简体版 (Chinese - Simplified)

日本語 (Japanese)

한국어 (Korean)

русский язык (Russian)

Af-Soomaali (Somali)

Español (Spanish)

Publicaciones Generales

Alertas de malas hierbas nocivas

Lugha ya Kiswahili (Swahili)

Wikang Tagalog (Tagalog)

Українська мова (Ukrainian)

Tiếng Việt (Vietnamese)

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