Author Archives
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What’s the connection between Washington’s fruit crops and tree-of-heaven?
An invasive insect harming grape vines and other crops in the northeastern United States might show up in Washington soon and scientists are using another invasive species to help them detect it early. Tree-of-heaven (Ailanthus altissima), an invasive tree species… Read More ›
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Control weeds in the fall to reduce work next year
In the cool, autumn months after the rains start up again, there is a window of opportunity for controlling many weeds. Digging and even hand-pulling is very effective in the fall when the soil loosens up with the rain and… Read More ›
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Fall is a great time to volunteer at stewardship events
Sure there might be a little rain, but you will warm up quickly working alongside your neighbors planting trees or yanking out invasive weeds. With the cooler temperatures and the return of the rain, the conditions are ideal for planting… Read More ›
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Purple Loosestrife – July 2018 Weed of the Month
Although it is perhaps one of the prettiest noxious weeds, purple loosestrife (Lythrum salicaria), is widely recognized throughout North America as a highly invasive and damaging weed in wetlands and along shorelines. Vigorous perennial roots and rhizomes combined with incredibly… Read More ›
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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 ›
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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 ›
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Poison-hemlock (Conium maculatum) April 2018 Weed of the Month
Poison-hemlock, the toxic cousin of the carrot, is easy to spot in April. Look for the large mounds of bright green, lacy-looking leaves on stout, purple-spotted stems rising up above the grass. It’s important to recognize because poison-hemlock (Conium maculatum)… Read More ›
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King County’s noxious weed program tackles several high priority species in April
King County’s noxious weed specialists have their hands full this month and it isn’t going to get easier anytime soon. Top priority noxious weeds they are focusing on this month include garlic mustard, European coltsfoot, giant hogweed and shiny geranium…. Read More ›
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Make room for trees – pull some weeds!
King County Parks, Green Seattle Partnership and many more organizations are making it easy for everyone to make room for trees and help grow a greener environment for Earth Month! Check out the great list of King County events for… Read More ›
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European coltsfoot (Tussilago farfara) March 2018 Weed of the Month
Just added to the Washington State Noxious Weed List in 2018, European coltsfoot (Tussilago farfara) is still new to many of us in the noxious weed world. However, this interesting species has been used as a medicinal plant in China… Read More ›
