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Noxious weeds

King County, Washington

To offer a suggestion or report an error on the King County Noxious Weeds website, please contact Sasha Shaw, education specialist.

Class Schedule

Register for a class

2015 Noxious Weed Control Seminar

Session Dates and Locations

Cost: Free (pre-registration required)
How to sign up: Register online
Credits: WSDA Pesticide License Recertification Credits will be available (see below for number)

Presenters: The 2015 agenda features noxious weed control identification and control information from the county's noxious weed specialists and live weed specimens on display, as well as special guest presentations by Alison Halpern, director of the Washington State Noxious Weed Control Board and Dr. Tim Miller, weed science researcher with WSU Extension.

At all sessions except May 6 (South Session), there will be an additional afternoon workshop featuring a tutorial on using backpack sprayers and a knotweed control and injector training presented by noxious weed program staff. Participants in the knotweed injector training will qualify to borrow the program’s knotweed injectors.  The May 6 South Session will end at 12:30.

Seminar Schedule:

Morning Session (available on all four dates; 5 credits)


Registration, refreshments and self-guided weed quiz


Weed List Updates and New Listed Species, Sasha Shaw, King County Noxious Weed Program


Noxious Weed ID and Control Part One, Noxious Weed Program Staff




Bees and Weed Control: How to Have Both, Alison Halpern, Washington State Noxious Weed Control Board


Research Results from Dr. Tim: Yellow Archangel, Knotweed, Butterfly Bush and Italian Arum, Dr. Tim Miller, WSU Extension




Noxious Weed ID and Control Part Two, King County Noxious Weed Program Staff


LUNCH - Bring your own

Afternoon Session (not available on May 6, will be available on May 13, 20 and June 9; 2 credits)


Backpack Spraying 101: Mixing, Calibrating, Cleaning and Maintenance, King County Noxious Weed Program Staff


Knotweed Control and Injector Training (participants will qualify to borrow the program’s knotweed injectors), King County Noxious Weed Program Staff


The King County Noxious Weed Control Program offers workshops and presentations upon request for community groups, neighborhood councils, vegetation management professionals, volunteer events, garden clubs and a wide range of other groups. Please contact Sasha Shaw if you would like a presentation on invasive plants or noxious weeds for your group, staff or community.

Related information

Related agencies

Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact staff, see the Noxious Weed Control Program Directory, send an email, or call 206-477-WEED (206-477-9333).