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County Weed Board

The Columbia County Weed Board, located in the County Extension Office, provides information and resources concerning weeds within Columbia County. Regular board meetings are the last  Wednesday of the month. Regular board meetings are held at 137 East Main Street, Dayton WA  99328. Board meetings are not held during the months of July and August.

Weed Board Coordinator, Naedene Shearer

Board Members include

  • Rick Turner, President
  • Josh Bowen, Vice President
  • Bill Warren, Secretary
  • Clayton McKinley, Director
  • Matt Talbott, Director


Mediterranean Sage


Mediterranean sage is a designated as a Class A weed by the Washington State Noxious Weed Control Board. It is an aggressive species that is not palatable and out-competes desirable forage plants in dry pastures and range-lands. Mediterranean sage reproduces by seed and acts like a tumbleweed to disperse its seeds.

The Columbia County Weed Board offers a cost share program for the control of Mediterranean sage in Columbia County.


Mediterranean sage 1
Mediterranean Sage in full bloom

Noxious Weed Disposal

knotweed growing through pavement

When controlling weeds, proper disposal is very important. Depending on the plant species, growth stage, and quantity, disposal methods can vary.

In general, if plants are flowering, cut and bag flowers when possible to prevent seed development and dispersal.  Seal bags and put them in the trash.  If plants are NOT flowering and do not spread vegetatively, the plants may be able to be pulled up by the roots and left on the ground to dry out.

Check out this publication for all the specifics about how to dispose of noxious weeds.

45 gallon lawn trash bag holding seeds

Not sure what kind of plant you have?  Call or stop by the office to have the weed identified before you begin to control it.  Identifying the weed will insure that you are disposing of the weed correctly.

2019 Meeting Dates

January 30, 2019–12:00 p.m.

February 27, 2019–12:00 p.m.

March 27, 2019–7:00 p.m.

April 24, 2019–7:00 p.m.

May 29, 2019–7:00 p.m.

June 26, 2019–7:00 p.m

July–No meeting

August–No meeting

September 25, 2019–7:00 p.m.

October 30, 2019–7:00 p.m.

November 27, 2019–12:00 p.m.

December 18, 2019–12:00 p.m.

Cost sharing for Class “B” Weeds

The Weed Board offers cost sharing for two other Class B weeds other than Yellow Starthistle. Those weeds are Japanese/Bohemian Knotweed and Leafy Spurge.

Knotweed     leafy spurge

Reimbursement for the control of Japanese/Bohemian knotweed and Leafy spurge in 2019 is as follows:

  1. 100% of herbicide cost the first treatment year.
  2. 75% of herbicide cost where treatment is needed the second season.
  3. In year 3 and following years, herbicide cost share will be evaluated on a case by case basis.
  4. Owners/operator is responsible for 100% of application costs.