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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.

Weeds in the news

Weeds sometimes make it to the press. Below are some of the recent (and some of the timeless) news items related to invasive plants.


King County urges landowners to watch for deadly noxious weeds this spring, King County Press Release. April 2, 2015

King County’s noxious weed list has growth spurt with addition of 4 new garden escapees, King County Press Release. Jan 8, 2015.  


Study suggests that climate change will make wetlands more vulnerable to invasive species

A story from California about how big a management problem water hyacinth can be when it gets established 

Australia tries out invasive plant sniffing dogs

Possible new tool in fight against cheatgrass in the intermountain west

A sad Christmas tree story for some shoppers in Hawaii and a cautionary tale about not checking for hitchhikers before transporting materials

Chinese botanists find that over 500 invasive plants have taken root in China, over half of which are from North and South America, including our local native goldenrod

Wayne’s World: Attack of the giant hogweed plant, it’s no joke. Hudson Valley’s, 8/17/2014.  A reminder to watch for this huge garden escapee, and also to avoid introducing a new species without doing your research.

Gardening: Pitch the Lythrum and plant something better.  Pittsburgh Post-Gazette, 8/16/2014.  An excellent gardener’s perspective on why we should not plant purple loosestrife in our gardens in spite of the undeniable attractiveness.  Thank you Carol Papas!

City of Bainbridge Island approves herbicide use to fight noxious weeds.  Bainbridge Island Review, 8/16/2014. The city decided that keeping noxious weeds controlled along public roadways is a crisis that must be addressed.

Getting more bang for your buck with herbicides. Post and Courier, 8/16/2014.  This article is not an endorsement of herbicide use, but rather it is an excellent summary of basic good practices if you do choose to use herbicides to control weeds.  Remember, the label is the law and it also tells you how to use the product so it will work best.

Invasive trees being treated in West Valley., 8/15/2014.  Crack willow, or Salix fragilis, is a non-native willow species that Yakima County is trying to get a handle on.  This is a species I definitely need to learn more about. 

Researchers investigate invasive plants., 8/10/2014.  Investigators are looking at whether native or invasive plants are benefiting more from climate change in Alaska.  Although the results aren’t in yet, it’s great that the research is being done.

Beware of the Giant Hogweed, the invasive plant that can cause burns and blisters. May 12, 2014 

City People's Garden Store first in King County to commit not to sell invasive plants, noxious weeds. King County/City of Seattle Press Release. April 9, 2014.

Climate change and noxious weeds. New research sheds some light on how climate change will affect noxious weeds (hint, the weeds will be happy).  See High Plains Public Radio and All Things Considered for a research project involving the impacts of increased carbon.  See the December 2013 Smithsonian Magazine for a different research project, and a news story about research showing that invasive plants in the waterways of Ireland will likely benefit from climate change.

New DNA tool helps distinguish invasive and native aquatic plants.  A USGS News Release describes how this tool helped pin down when non-native hydrilla was first found in the Potomac River.

Spartina control in the San Francisco Bay Area turns a corner.  A recent story in BayNature describes the painstaking process of restoring the native spartina while eradicating the non-native species and hybrid without harming the endangered clapper rail.

Pesticides and bees. There is a new resource available on how to reduce bee poisoning from pesticides, especially certain insecticides that pose the greatest risk.  The information is summarized in the PNW Insect Management Handbook or you can download the complete publication, How to Reduce Bee Poisoning from Pesticides (PNW 591) (Search for “PNW 591”).

April news wouldn’t be complete without one story like this.  See this HCN Story on a supposed big new invasive animal problem in the west.


The story of clematis:  Guest column Islands' Sounder, December 19, 2013

Noxious Weed Control Board meets Jan. 15 to determine 2014 King County noxious weed list. King County Press Release. December 16, 2013.

How Climate Change is Helping Invasive Species Take Over. Smithsonian, December 2013.
Invasive plants blooming earlier with climate change

Bay Researchers Fight Uphill Battle with Invasive Cordgrass. BayNature, November 21, 2013.
Article outlining the history and Work on controlling Spartina in California by the Invasive Spartina Project. They are working to control Spartina alterniflora and also a hybrid of S. alterniflora with a native species, California cordgrass, S. foliosa. This hybrid has been tough to eradicate.

Reducing Milk Thistle to Zero Density. TechLine Invasive Plant News, September 9, 2013. 
Article in Techline news about milk thistle control efforts on Catalina Islands and their new approach to control with includes early fall applications of Milestone herbicide at 6 fluid ounces per acre (fl oz/A).

Microbes Facilitate the Persistence, Spread of Invasive Plant Species by Changing Soil Chemistry
Sep. 26, 2013 -- Invasive species are among the world's greatest threats to native species and biodiversity. Once invasive plants become established, they can alter soil chemistry and shift nutrient cycling in an ecosystem. This can have important impacts not only on plant composition, diversity, and succession within a community, but also in the cycling of critical elements like carbon and nitrogen on a larger, potentially even global, scale.

Hunting? Don't Spread Noxious Weeds in Idaho's Backcountry
Sep. 26, 2013 -- During Idaho’s hunting seasons, thousands of people traverse Idaho’s backcountry. So the threat of spreading noxious weed seeds from infested areas is at a high level, state weed officials warned.

Spartina control in British Columbia gets a boost from Washington’s Spartina program
August 22, 2013 – The WSDA Spartina crew was up in British Columbia this summer, helping to treat spartina populations. This is the first time aquatic herbicide applications have been used in Canada.  Washington has made excellent progress in combating spartina and controlling populations up north will greatly help Washington’s effort to eradicate this tough noxious weed from the beaches and mudflats of Puget Sound and Washington’s coast (see the link above for the video).

Soil scientist suggests fallow tillage to organic farmers
August 21, 2013 -- A soil scientist at Cornell University suggests organic farmers use tillage to control weeds without sacrificing their soil structure. Charles L. Mohler, senior research associate at Cornell's Department of Crop and Soil Sciences, described a technique of fallow tillage as part of a crop rotation approach.

Prehistoric Europeans spiced their cooking (with garlic mustard)
August 21, 2013 -- Europeans had a taste for spicy food at least 6,000 years ago, it seems.  Researchers found evidence for garlic mustard in the residues left on ancient pottery shards discovered in what is now Denmark and Germany. (See link above for the full article).

King County sounding the alarm as harmful weeds begin to grow this spring. King County Press Release. April 2, 2013.

Plant wars kick in when dams come out. Great Lakes Echo. March 8, 2013.
Vegetation management is needed to avoid letting invasive plants get a jump on native plants in midwestern dam removal projects.

Invasive species hitchhiking to west coast on Tsunami debris. Times Colonist. March 8, 2013. 
Concerns about tracking invasive species coming to BC, Washington and Oregon coasts from the 2011 tsunami in Japan.

Invading Species Can Extinguish Native Plants Despite Recent Reports to the Contrary. Science News, January 9, 2013.
Ecologists at the University of Toronto and the Swiss Federal Institute of Technology Zurich (ETH Zurich) have found that, given time, invading exotic plants will likely eliminate native plants growing in the wild despite recent reports to the contrary.


Aggressive ground covers may really be invasive weeds. Oregon, September 13, 2012.
Be careful what you plant: here’s a look at some groundcovers that are invasive and very hard to get rid of.

Meet Seattle’s Newest Invasive Plant. A garlic mustard infestation poses serious threats - and it will cost you. Seattle Magazine, August 2012.
Seattle Magazine writer Roddy Scheer writes about his experiences with garlic mustard and the King County Noxious Weed Program.

Concrete-busting weed can threaten projects. Journal of Commerce, August 29, 2012.
Knotweed catches the attention of the construction industry in British Columbia (and should here as well).

Help stop invasive plants species [in British Columbia] with new app. Kamloops The Daily News, August 24, 2012.
Reporting invasive weeds just got a lot easier in British Columbia with the new Report-a-Weed smart phone app for reporting weeds anywhere in the province.

Nasty alien weeds a growing threat in populated corners of Alaska. Alaska Dispatch, July 10, 2012.
A humorous and sobering view on invasive plants in Alaska from former Alaska Department of Fish and Game wildlife biologist Rick Sinnott.

King County Targets 3 New Invasive Plants. King County DNRP Press Release. March 20, 2012.
County offers free workshops to teach residents and agencies what to look for and how to control noxious and invasive weeds.

Revised Aquatic Noxious Weed Permit issued by Department of Ecology. Mason County Daily News. February 3, 2012.
The State's revised permit is in effect for anyone controlling noxious weeds with herbicides near water.

UCSB Scientists Warn Against Invasive Species. Daily Nexus. January 31, 2012.
A recent study led by scientists at UC Santa Barbara's National Center for Ecological Analysis and Synthesis demonstrated how globalization and the demand for drought-resistant plant species threaten to overcome native plants in the United States. Based on these findings, the scientists proposed that bio-imports be screened before entering the U.S.

State revises permit covering treatment of aquatic noxious weeds. Washington Department of Ecology Press Release. January 23, 2012.
The Washington Department of Ecology has revised a permit that protects people and the environment when herbicides are used to curb the spread of noxious weeds growing in wet areas.

Peg Tillery: Knock out knotweed now.  Kitsap Sun. January 31, 2012.
This columnist reminds us to get the ball rolling on knotweed control plans for the year.

Cattle can be trained to eat weeds, control noxious growth in pastures.  Prairie Star. January 4, 2012.
There has been success so far with a pilot program in Montana where cattle were trained to eat Canada thistle. The cattle ate enough of the plants to prevent them from going to seed. In other mentioned cases, cattle also ate musk thistle and spotted knapweed.


Lake Oswego council takes a whack at invasive trees.  Portland Tribune. December 22, 2011.
Oregon’s Lake Oswego’s city council has a new permit process that hopes to encourage the removal of invasive trees. Before, residents had to pay permit fees to remove these trees, now they can get a permit in a free, expedited process.

Danger of dumping yard waste in natural areas. Woodinville Patch. November 9, 2011.
This article explains how weeds can spread from yard waste and the problems invasive weeds cause in forests and parks.

Board classifies perplexing invader as noxious weed. OPB News. November 3, 2011.
The Washington State Noxious Weed Board adds Japanese eelgrass to the noxious weed list to help commercial shellfish growers obtain permission to control it.

Couple are forced to demolish their £300k four-bed home after it was invaded by Japanese knotweed. MailOnline. October 23, 2011.
This story might be a bit alarmist but you have to admit it's also a bit alarming. Knotweed is truly an expensive problem when it gets entrenched like this.

Hard-to-kill 'beach kudzu' threatens sea turtles, native plants. The Post and Courier. October 18, 2011.
Beach vitex is truly a nightmare along the SE United States coast but it sounds like funding cuts may undermine the progress that has been made.

Dirt Road Maintenance Spreads Invasive Plants. Discovery News. August 9, 2011
Routine roadwork on rural roads may be aiding the rapid spread of invasive species according to a new study. Road graders used in the study sometimes carried seeds more than 200 times farther than the seeds can spread on their own. The findings suggest that, for the sake of the environment, maintenance crews might want to consider altering the timing or techniques they use to keep dirt and gravel roads in shape.

Lake Osoyoos Milfoil Border Battles
Lake weeds always pose challenges since there are no clear boundaries for aquatic weeds and everything else the water carries. On Lake Osoyoos it is even more challenging since the Canadian-US border runs right through the lake. Here are two stories on this situation from different perspectives.

Advice Column from a California Invasive Plant Activist
This article offers a host of great ideas about how to deal with invasive plants. Even if some of the species are not familiar here, the principles and methods are much the same for our weeds.

Food for Thought on Nature
Not really news, and only indirectly about weeds, but a heartfelt and thought-provoking essay inspired by my favorite local park.

County leads fight against foreign invaders on Snoqualmie River. SnoValley
It's a tough battle, but we are making progress against knotweed on the upper forks of the Snoqualmie River.

Misidentification of poison-hemlock can be deadly. Nisqually Valley News.
Timely reminder to watch for and remove poison-hemlock before it is mistaken for something edible.

Seeing yellow; tackling the invasive Scotch broom, North Kitsap Herald, Kitsap Week.
Erin Jennings answers the question on many people's mind these days - what's up with all that Scotch broom along the highways and why isn't anyone doing anything about it?

County seeks weed warriors, SnoValley Star.
To bolster the campaign, county officials want residents to help find locations of non-native plants. So the county is holding a series of workshops beginning in late May and running through July. Invasive, or noxious, weeds are not native to the region, and can cause ecological and economic damage.

Invasive spartina has been nearly eradicated from state's shorelines, Kitsap Sun.
This is great news for Washington. Spartina, an invasive plant that once threatened shellfish beds and saltwater marshes throughout Western Washington, has been nearly wiped out in this state.

Issaquah residents can learn to tackle noxious weeds, Issaquah Press
The least-wanted list includes plants, such as garlic mustard. ... The county's Noxious Weed Program is offering a free class on invasive and noxious weeds ...

King County offers free workshops to help residents tackle tough noxious weeds, PNW Local News
King County is hunting for the state's top invasive and noxious weed targets, and wants to help County property owners find and control these rogue invaders ...

Woodinville Weed Alert: Remove These Non-Native Plants For Your Garden and the Environment,
Noxious weeds are non‐native plants that, once established, are highly destructive, competitive and difficult to control. They have economic and ecological impacts and are very difficult to manage once they get established.

Today’s garden plants can be tomorrow’s invasives, High Country News
Western states have been at war with weeds for more than a century. State weed programs, however, tend to focus on plants that hamper agriculture and ranching. Rogue garden plants, typically perennials that farmers can easily vanquish through tilling, primarily threaten wildlands -- less-familiar ground for state agriculture agencies.

Lake Sammamish level concerns homeowners, Issaquah Press
King County environmental managers plan to tackle the high water level in Lake Sammamish, after aquatic weeds and sediment clogged the outlet from the lake to the Sammamish River.

Weed warriors declare saltcedar vanquished, Jackson Hole News&Guide
Member organizations of the weed management association launched an aggressive Early ... “'Eradicate' is a word we don't get to use much in invasive species ...

Scotch broom, that pesky noxious weed, carries an economic cost, The Olympian
Any plant, no matter how beautiful, can turn into a noxious weed, an invasive species, if it is left to flourish in an area where it cannot be controlled. ...

Help eliminate Scotch broom, Siuslaw News
Scotch broom is classified as a “B-rated” noxious weed by the Oregon Department of ... and residents to seek its help to eradicate this invasive plant.

Daily home & garden tip: Weed profile -- Scotch broom is beautiful but invasive,
The extremely invasive perennial has pushed out native species and upset the ... Control: Pull out young plants by hand. Larger shrubs might need to be cut

Lack of funds not deterring weed control in Jefferson County, Peninsula Daily
“It's the same plant that killed Socrates.” The state mandates that each county fund a noxious-weed control program. Dixon, a Jefferson County employee

Rocky Mountain Elk Foundation Announces Grants for Oregon Habitat,
Fire suppression and noxious weed infestations are slowly altering the composition of ... treat 800 acres of weeds and invasive plants in Monument area of ...  

Olympic National Park growing nature's 'defenders' for Elwha River restoration. This experiment in large scale restoration includes a plan for keeping invasive plants at bay. This is great news because this issue is all too often left until the problem is already there. Prevention is much cheaper and it sounds like they will be making every effort to stay ahead of the weeds. It will be worth watching to see what works and what doesn’t.

Killer weed invades farms, grazing lands, and national parks. O.K. this story is from Kenya, but I couldn’t resist the dramatic headline. The weed in question is from Central America, so not very likely to be a threat in our colder climate. Still, it is an interesting look at how similar the issues and impacts are globally with noxious weeds.    

Building an outdoor classroom in McKinleyville: Land trust, Dow's Prairie effort explores seasonal wetland for education. In McKinleyville, California school children are taking part in a restoration project called the Dow’s Prairie Schoolyard Habitat Program. The program, funded by grants, teaches the school children all about a wetland that they are working to help restore. Restoration work includes removing invasive plants we deal with here including Scotch broom and blackberry. Involving schools that are close to restoration projects may be something many of your are doing already or could be something to try in the future.

Grazing Arizona: Goats vs. Mesa weeds, Round 2. This article talks about goats being used in Arizona to control weeds including saltcedar. There is a nice video here if you are interested in watching the goats in action, along with how and why they are being used in this area.


WEED WARRIORS: Grant to help council fight invasive weeds in the Truckee River watershed. Invasive weed control in Tahoe gets a financial boost.

BLM announces decision on weeds (Ed Note: removed link as of 8/7/2014). Oregon’s BLM office announces an expansion of herbicide use for weed control efforts to include all invasive weeds as well as other vegetation management activities.      

Idaho man builds career out of aquatic species removal after home lake is threatened. In more news from Lake Tahoe, a local homeowner and expert diver makes it his personal mission to fight back against milfoil in the lake.

Foreign plants, animals conquering native species. In this article from Kentucky, the names of the invasives are different, but the story is familiar. It is interesting also to read about one of the unintended consequences of the ornamental plantings in their Olmsted parks.

Green My Ballard: Upper Golden Gardens, Ballard’s backyard wilderness. Closer to home, this story is all about the great invasive weed control work being done in one of Seattle’s really great forest remnants.

Noxious Weeds Take Note: Your days are numbered. If only the weeds could read, they would be shaking in their roots.

It's a scary time to be a weed. Communities around the country band together to fight back against invasive weeds. Wall Street Journal, September 29, 2010.

Root out trouble: Noxious weeds grow quickly, choke out native plants. Eco-consumer Tom Watson alerts readers to the problems of noxious and invasive weeds like knotweed and giant hogweed. Seattle Times, July 29, 2010.

Attack of the giant hogweed? Hogwash. The Globe and Mail, July 23, 2010.

Nasty weeds know no bounds - Noxious: Invasive plants can take over, even kill people. Tacoma News Tribune, July 14, 2010. [Ed. Note: the link to this article is no longer active and has been removed.]

King County fights invasive weed threatening Snoqualmie Valley., May 5, 2010.

Snoqualmie Valley forests at risk from aggressive invasive weed garlic mustard., April 23, 2010.

Park officials fighting largest noxious weed growth in Bellevue., April 7, 2010.

Harnessing the power of bugs for profit., April 5, 2010.

King County Noxious Weed Program helping Bellevue fight tough forest invader. Discovery of the largest garlic mustard site in Bellevue jump starts the county's noxious weed season. King County DNRP Newsroom. March 30, 2010.        

Mortgages refused over invasive weed. March 13, 2010.

Montana noxious weed list is restructured. Montana State University News, March 12, 2010.

Under quarantine: Ivy, butterfly bush, Scotch broom and their cultivars face tough new state rules., March 2, 2010.

Oregon bans sale of English ivy, butterfly bushes. The Oregonian, February 10, 2010.

Invasive Plants Are Beneficiaries of Climate Change in Thoreau's Woods. ScienceDaily, February 3, 2010.

Group helps rid Kodiak of invasive plants. Kodiak Daily Mirror, February 3, 2010.

Invasive species threat growing globally, experts warn., January 22, 2010.        

Invasive species and climate change work together to threaten biodiversity. Guardian Environment Network, January 5, 2010.


Cowlitz County gets a boost in their weed-fighting budget Weed assessment increase will allow this county to continue to battle noxious weeds. The Daily News Online, December 26, 2009.

Volunteers battle holly and ivy in local forests. Non-profits and volunteers struggle to fight English holly and ivy in parks and forests in the Seattle area. KOMO News, December 20, 2009. [Ed. Note: the link to this article is no longer active and has been removed.]

Brazilian weed infestation might be beaten. Thurston County Noxious Weed Board believes they may have eliminated Brazilian elodea from the Chehalis River after 10 years of removal. The Olympian, October 6, 2009. [Ed. Note: the link to this article is no longer active and has been removed.]

County is after milk thistle. Enumclaw residents are asked to watch for this aggressive Class A thistle that is infesting farms on the Plateau. Enumclaw Courier-Herald, June 16, 2009.

'Super weed' taking strong hold in Utah. Big, bad phragmites is getting worse. It looks like the plants toxins are getting stronger thanks to increased UV light and fertilizer run off., June 8, 2009.

Boom Times for Scotch Broom Blooms. Kitsap County Noxious Weed Program struggles to keep up with bumber broom season, tansy ragwort and other noxious weeds. Kitsap Sun, June 3, 2009.

It’s a noxious task, but someone’s got to control weeds . Outdoor enthusiasts are called to action (and to become educated) to fight weeds impacting wildlife and natural areas. Spokesman-Review, May 28, 2009.

Klahanie's natural areas registered as wildlife sanctuary . A local success story of invasive weed control and community stewardship leading to improved habitat and protection for wildlife. Issaquah Press, May 26, 2009.

The Hungry Gardener tackles weeds . Helpful tips for weed control in home vegetable gardens. JS Online, May 26, 2009.

So far, no more garlic mustard weed found. The search is on for more sites, but so far garlic mustard has been nipped in the bud on the Olympic Peninsula (see first story below). Peninsula Daily News, May 26, 2008.

Invasive weed found in Port Angeles probably first on Peninsula . A scary discovery considering that garlic mustard has never been seen on the Olympic Peninsula before. Peninsula Daily News, May 18, 2009.  

Invading garlic mustard marches on beloved Columbia gorge flora (The Oregonian, April 26, 2009)

Why Invasive Plants Take Over (USDA-ARS News & Events, April 30, 2009)

King County's noxious weed list growing (King County Press Release, February 3, 2009) [Ed. Note: the link to this article is no longer active and has been removed.]

Web site would help state track invasive plants (Seattle Times, January 16, 2009)

Scientist names top 5 invasive plants threatening Southern forests in 2009 (, January 12, 2009)


New local threat revealed (Yellow Floating-Heart in the Siskiyou National Forest) (Mail Tribune, December 13, 2008)    

Groups band together in fight against weeds (Sammamish Review, December 9, 2008)

Climate Change Opens New Avenue For Spread Of Invasive Plants (Science Daily, November 30, 2008)

Lakeshore residents remove invasive plants (Sammamish Review, November 18, 2008)

Butterfly bush: The state adds cultivars to the list of harmful invaders (The Oregonian, November 17, 2008)

Nature Conservancy uses high-tech plane to eliminate invasive weeds (KHNL-NBC, November 12, 2008)

Preventing weeds beneath the bird feeder (Christian Science Monitor, October 29, 2008)

Got Weeds? These Sheep Will Make House Calls (The New York Times, October 26, 2008)

Know what's invasive and what's banned when deciding what to plant (The Seattle Times, October 26, 2008)

A superweed spreading throughout the UK could be brought under control by introducing plant-eating predators from Japan, scientists believe (BBC News, October 13, 2008)

Plant Seeds Hitch Rides on Traveling Shoes (The New York Times, October 10, 2008)

Boaters face fine for spreading milfoil (, September 11, 2008)        

Can Weeds Help Solve the Climate Crisis? (New York Times Magazine, June 29, 2008)

Hunt is on for noxious weeds in King County (King County Press Release, May 2, 2008) [Ed. Note: the link to this article is no longer active and has been removed.]

Fighting one exotic species with another: Purple loosestrife is target of beetles (The Boston Globe, April 27, 2008)

War Against Noxious Weeds Likely to Heat Up (Kitsap Sun, April 7, 2008)

Bainbridge Island Students Dig In to Get the Weeds Out (The Kitsap Sun, March 6, 2008)

USDA Awards More Than $4 Million in Weedy and Invasive Species Grants (USDA-CSREES Newsroom, March 3, 2008)   


Horses Disperse Alien Plants Along Recreational Trails (ScienceDaily, November 26, 2007)

Invasive Plant Secretes Acid To Kill Nearby Plants And Spread (Science Daily, October 15, 2007)

Getting to the bottom of lakes (Seattle Times, Southeast King County News, October 14, 2007)

Toxic plants sold without warning (The Sydney Morning Herald, September 16, 2007)

Man dies after getting entangled in milfoil (Seattle P-I, August 26, 2007)

Plant invaders enjoy life in the fast lane (New Scientist, August 5, 2007)    

EPA facing lawsuits over pesticide rules (Seattle Times, January 2, 2007)


Ann's Organic Garden: Destroy tansy ragwort before it can multiply (Ann Lovejoy, Seattle P-I, August 5, 2006)

King County in a race against the clock to stop the spread of toxic tansy ragwort (King County Press Release, July 18, 2006) [Ed. Note: the link to this article is no longer active and has been removed.]

Before you begin spraying, know how weed killers do their job (Seattle Times, July 15, 2006)

King County encourages landowners to get a jump on noxious weeds (2006 Start of Weed Season Press Release) (King County Press Release, May 1, 2006) [Ed. Note: the link to this article is no longer active and has been removed.]


Noxious -- or obnoxious -- county orders landowners to off invasive weeds (Seattle P-I, July 25, 2005)    


Milfoil in Spring Lake (Seattle P-I, July 29, 2003)

Black velvet bliss — and major thorn: blackberry a double-edged fruit (The Seattle Times, August 26, 2002)

You will need Acrobat Viewer to read the following articles:

Noxious Weed Threatens Local Gardens, Parks (KIRO 7 TV, May 12, 2003)

Garlic mustard, highly invasive noxious weed spotted in Seattle's parks and neighborhoods; County seeks help to identify and eradicate (King County Press Release, May 8, 2003)

Scot's Broom - Northwest Garden News (May 1, 2003)

Giant Hogweed - Northwest Garden News (March 4, 2003)

Ivy - Northwest Garden News (February 4, 2003)

Weeds - Northwest Garden News (January 10, 2003)

KC weed news archive

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).