1. Canada Thistle

    Cirsium arvense Canada Thistle - A rhizomatous, perennial, herbaceous plant that grows 2-5 feet tall, usually branching only near the top of the plant.Leaves: Leaves are alternate and lance to narrowly oval in shape, possessing short spines along the leaf edges.Flowers: Flowers bloom from May-October. Many flowerheads clustered towards the tip of the stem, purple to pink in color.Habitat: Common in pastures and croplands. Can also invade wet areas as well like steam banks, sedge meadows, and wet prairies.Weed Classification: C SelectWhy is it a Noxious Weed?Once established, it can spread vigorously and replaces native plants. It also lowers crop …


    Weed Control - Oct. 6, 2022, 9:32 a.m.

  2. 2014 Noxious Weed List

    The Lewis County Noxious Weed Control Board adopted the 2014 County Weed List. The new list for 2014 includes a couple of new additions that landowners and citizens should be aware of: Lesser celandine, (Ficaria verna) or fig buttercup is a low growing perennial that is visible in the spring and dies back by mid-summer. Originally introduced as an ornamental, the species has bright yellow, solitary flowers. It prefers moist ground in open low woodlands, floodplains, and waste areas. Herbarium records identify locations Lesser celandine found in King County, Whatcom County, and Snohomish Counties. There are a number of cultivars …


    Weed Control - Feb. 12, 2014, 1:50 p.m.

  3. Weed Identification

    Successful weed management starts with proper identification What is it? Is it noxious? Is it native? Is it poisonous? Is it even a weed?Weeds can fall under many different categories, and sometimes the same weed can be many of these at once! The first step in successful weed management is accurate identification and understanding of its life cycle. We are available to identify weeds both in the office and on site. There are also numerous resources online to help identify the weed in question, along with descriptions of feasible control options and methods, here are a few of our favorites:Washington …


    Weed Control - Sept. 27, 2019, 12:57 p.m.

  4. Kudzu

    Pueraria montana var. lobata Kudzu - A perennial trailing or climbing vine. It grows at a very fast rate and can easily take over an area if left unchecked.Leaves: Alternate and compound leaves with three oval shaped leaf sections.Flowers: Flowers bloom from May-June. Purple to reddish purple flowers clustered along a center stem that grows about a foot long. The flowers are similar to pea flowers and are fragrant.Habitat: Well drained eroded or degraded land or sandy loam soils in full sun.Weed Classification: AWhy is it a Noxious Weed?A highly aggressive plant that smothers anything in its path. It can …


    Weed Control - Sept. 29, 2022, 10:57 a.m.

  5. Lewis County Noxious Weed Control Board Meeting

    351 NW North StreetHistoric CourthouseMeeting Room in BasementOpen to the Public


    Weed Control - Dec. 19, 2019, 2:32 p.m.

  6. New additions to Washington State Noxious Weed List

    New additions to the 2016 Washington State Noxious Weed List The Washington State Noxious Weed Control Board at its Nov. 3, 2015 meeting in Wenatchee adopted changes to the 2016 weed list. The Lewis County Noxious Weed Control Board will consider and adopt changes to the County Weed List at their February 16, 2016 public hearing and meeting. More information about the Weed list is available by contacting the Weed Program at 360 740 1215. The three new additions to the Class C, 2016 state noxious weed list includes: English hawthorn (Crataegus monogyna) is a long-lived small tree that has …


    Weed Control - Jan. 5, 2016, 9:29 a.m.

  7. Yellow Flag Iris

    Iris pseudacorus Yellow Flag Iris - Perennial invasive ornamental that grows 2-3 feet tall, is considered toxic to herbivores and contains a skin-irritating sap.Leaves: Broad, flat sword-shaped basal leaves that reduce in size going up the stemFlower: Multiple flowers appear at stem terminals, can be pale to dark yellow, have 3 sepals and 3 petals with its petals shorter than its sepals. Blooms visible May - July.Habitat: Grows in wetlands along the margins of lakes and slow moving rivers. It is most commonly found in shallow water or mud such as those in wet ditches.Weed Classification: C SelectWhy is it …


    Weed Control - Sept. 12, 2022, 12:12 p.m.

  8. Wild Carrot

    Daucus carota Wild Carrot - An upright, taprooted herb that grows about 1-4 feet in height. Can be an annual, a short-lived perennial, or a biennial.Leaves: Leaves are thin and fern-like. Leaf segments are lance or linear in shape with toothed edges.Flowers: Flowers bloom from June-September. Flowers are in flat topped umbels and are small and white. The very middle of the umbel can have purple/darker flowers making it look like a black spot in the middle.Habitat: Commonly found in meadows, pastures, roadsides, waste areas, and yards.Weed Classification: C SelectWhy is it a Noxious Weed?It can spread easily and outcompetes …


    Weed Control - Oct. 6, 2022, 9:33 a.m.

  9. Report An Infestation

    Report Weeds Here (<-- Click link)Citizens can report noxious weeds infestations utilizing the link above.If you are uncertain about ID, please take several photos of leaves, flowers, branches and entire plant, and send to weeds@lewiscountywa.gov or consult the state board online resource found here: Washington State Noxious Weed Control Board.


    Weed Control - April 6, 2023, 11:32 a.m.

  10. Enlgish Ivy & Old Man's Beard

    Hedera helix & Clematis vitalba English Ivy - Evergreen, perennial vine that can grow up trees and bushes or spread freely along the ground. Can grow 99 feet and the young plants can anchor to vertical surfaces.Leaves: Dark green, waxy leaves that are alternate along the stem. Young leaves are deeply lobed while older leaves are diamond to oval shaped.Flowers: Flowers bloom from May-June. Only older plants flower and that can take up to 10 years. The flowers are greenish white and form umbrella-like clusters.Habitat: Commonly found in woodlands, forest edges, riparian areas, fields, hedgerows, coastal areas, and disturbed habitats. …


    Weed Control - Oct. 6, 2022, 9:33 a.m.