1. Noxious Weed Board

    Mission Statement:It is the mission of the Noxious Weed Board to serve as responsible stewards of Lewis County land and agriculture, and to protect and preserve our ecological resources against the harms of noxious weeds. We endeavor to develop programs that reflect local priorities, meet the needs of county landowners and residents, and carry out the mandate of the Washington State noxious weed law, the RCW 17.10. The county Noxious Weed Control Program provides consultation on weed prevention strategies, educational programming, technical assistance, enforcement actions, and a variety of other resources to help control or eradicate noxious weeds in our …


    Weed Control - Jan. 23, 2019, 4:12 p.m.

  2. Blackberry (Himalayan & Cutleaf)

    Rubus armeniacus & Rubus laciniatus Himalayan Blackberry Himalayan Blackberry Cutleaf Blackberry Cutleaf Blackberry Himalayan Blackberry - A rambling, evergreen, perennial, woody shrub with stout, hook-thorned stems.Leaves: Leaves are palmately compounded with 3-5 leaflets (5 is most common). Leaves have slightly toothed margins.Flowers: Flowers bloom from May-August. Flower clusters generally have between 5-20 flowers that have 5 petals and are white to rose in color.Habitat: Grows in a variety of habitats including forests, roadsides, railroad tracks, logged lands, field margins, and riparian areas.Weed Classification: CWhy is it a Noxious Weed?Himalayan Blackberry is very hard to control after a serious infestation has …


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

  3. Yellowflag Iris

    Iris pseudacorus Yellowflag Iris - A perennial, herbaceous, aquatic plant, growing 2-3 feet in height.Leaves: Basal leaves are sword shaped and larger than the leaves found higher up the stem.Flowers: There can be few or many flowers near the tip of the stems. Flowers are white-dark yellow with purple markings. There are 3 petals and 3 sepals.Habitat: Most commonly found growing in very shallow water or mud. It can also grow along lake shores and slow-moving rivers. It tolerates a variety of conditions.Weed Classification: C SelectWhy is it a Noxious weed?It is an ornamental that has become a nuisance in …


    Weed Control - Oct. 6, 2022, 11:46 a.m.

  4. Lakes - Aquatic Weed Treatments

    Aquatic weeds pose a variety of risks, including flooding, habitat degradation, impeding water flow, decreasing recreational opportunities, and much more. Often forgotten about and less visually obvious to most people, aquatic weeds are frequently going under the radar. It is important for the public to be aware of the presence of aquatic weeds in the water bodies they visit and take measures to prevent their spread!The PlayCleanGo campaign provides excellent information on necessary precautions and procedures that should be taken by all, in order to reduce the spread of aquatic noxious weeds. Stop Aquatic Hitchhikers also offers a variety of …


    Weed Control - Sept. 6, 2022, 12:10 p.m.

  5. 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.

  6. Reed Canary Grass

    Phalaris arundinacea Reed Canarygrass - A highly variable perennial plant, with rhizomes. Grows 3-6 feet in height.Leaves: Leaf blades are flat and smooth. The leaf has a wide connecting point to the stem.Flowers: Flowers bloom from June-July. Densely clustered flowers in panicles. 3 florets per spikelet and only one fertile spikelet. Flowers start out green-purple and change to tan/brown overtime.Habitat: Usually grows where ground is at least somewhat saturated during growing season. Habitats include: roadside ditches, river dikes, shallow marshes, wetlands, and meadows.Weed Classification: CWhy is it a Noxious Weed?A major threat to wetlands due to its aggressive nature. It …


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

  7. 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.

  8. Italian Arum

    Arum italicum Italian Arum - Perennial, herbaceous plant that grows from tubers. Multiple tubers will be produced during growing season.Leaves: Leaves emerge in the fall-winter and will die back in the summer. Leaves are arrowhead-shaped, green, and possibly has cream or silver-gray colored veins and markings. Young leaves are generally more oval in shape.Flowers: Flowers bloom from April-June. Made up of a spathe and spadix, and grow into many red-orange berries in a cluster.Habitat: Normally found in forest understudies, riparian areas, wetlands, old gardens, woodland gardens, and disturbed areas near urban developments.Weed Classification: CWhy is it a Noxious Weed?It is …


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

  9. 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.

  10. Common Catsear

    Hypochaeris radicata Common Catsear - A perennial with a basal rosette of leaves, followed by upright/slightly bent stems that are usually leafless in its second year.Leaves: Leaves are rough and hairy, with lobed or waxy margins. Leaves can be 1.2-13.8 inches long and .2-2.8 inches wide.Flowers: Flowers bloom from May-October. Dandelion-like flowers that are yellow and disc like and are 1-1.5 inches across.Habitat: Common Catsear grows in disturbed areas, such as yards, roadsides, pastures, waste areas, gardens, and seed fields.Weed Classification: CWhy is it a Noxious Weed?It is a potentially poisonous, aggressively spreading plant that invades lawns and lowland pastures. …


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