Weeds are, unfortunately, a common sight, but it takes a special kind of weed to make the “World’s Top 10 Worst Weeds List.” Field bindweed (Convolvulus arvensis), a non-regulated Class C noxious weed, is one of them. If you’ve ever… Read More ›
Weed Control
County’s program steps in when people need a helping hand to battle tansy ragwort
It’s the first week of August, the days are hot, and there’s one plant on every Noxious Weed Specialist’s mind: tansy ragwort (Senecio jacobaea). This biennial, regulated Class B noxious weed grows throughout King County, especially on open, sunny sites… Read More ›
Stop Noxious Weeds, by Land and by Seeds!
Noxious weeds are sneaky. Each one has its trick for taking over: many spread by seed, while others use stem and root fragments, underground rhizomes, or aboveground runners. Anytime you’re out around a noxious weed, make sure you know how… Read More ›
Weed Control Methods Workshop (July 12) and Other Upcoming Classes
Beating back noxious weeds is often tough, but knowing the best way to control them can make your job a whole lot easier. That’s why the King County Noxious Weed Control Program is offering a free Weed Control Methods Workshop… Read More ›
Himalayan Blackberry – June 2018 Weed of the Month
If Washington ever decided on a state weed, Himalayan blackberry (Rubus armeniacus) would be a strong contender. Some people hate its thorns, some love its berries, but almost everyone has a strong opinion about it. Yet, for all its fame,… Read More ›
Knotweed control classes offered June 20 and June 26
If you have knotweed that you want to control, taking a class might be a good first step. Our riparian team will be teaching two sessions of our popular free workshop on invasive knotweed control on June 20 and June 26…. Read More ›
Invasive weeds that are ripe for action this time of year
All over King County invasive weeds are on the move, growing in parks, gardens, roadsides, and many other places. Now is a perfect time to get outside, enjoy the sun, and eradicate them! Below are some important invasive and noxious… Read More ›
Noxious weeds to watch for in June
If you’ve made it outside on a recent sunny day, you’ve probably noticed the abundance of flowers blooming in gardens, parks, forests, and throughout King County right now. Unfortunately, the noxious weeds are out there, too—many of them bolting, flowering,… Read More ›
Milk Thistle – May 2018 Weed of the Month
If you’ve ever walked barefoot in a field, chances are you’ve felt a thistle: those spiny-leaved plants that prick your feet and make you jump. Left unchecked, they produce purple or pink flowers at stem ends and plenty of seeds…. Read More ›
Noxious weed shiny geranium spreading on Vashon Island and other places in King County
When noxious weed specialists Maria Winkler and Minwook Park drove down a quiet street on Vashon Island earlier this spring, they were alarmed to find a large, dense carpet of shiny geranium lining the road. It wasn’t the first time… Read More ›
