Policeman’s helmet (Impatiens glandulifera) is an invasive annual which threatens streams and rivers throughout the Pacific Northwest. It is designated as a Class B invasive weed in Oregon. This means that it is […]
Tag Archives | WeedWise
Oregon (and National) Invasive Species Awareness Week Part 2
What’s better that one National Invasive Species Awareness Week for 2020? How about two? National Invasive Species Awareness Week Part 2 (May 16 – 23, 2020) is upon us! Take some time this […]
May Invasive Weed of the Month: Orange Hawkweed
Orange hawkweed (Hieracium aurantiacum) is a fairly new invasive weed in Clackamas County and, with your help, our WeedWise team plans to keep it from becoming a common problem for landowners! A member […]
April Invasive Weed of the Month: Garlic Mustard
Garlic mustard (Alliaria petiolata) is an increasingly invasive weed in our community. Native to central and western Europe, this fast-growing plant commonly invades sites such as parks, trails, roadsides, and streamsides. April is […]
The Undesirable Beauty of Lesser Celandine
Each spring we welcome the return of abundant flowers and cherish them as they lift our spirits. Unfortunately, some of these beautiful plants have proven to be aggressive and, ultimately, highly unwanted. One […]
March Invasive Weed of the Month: Canada Thistle
Canada thistle (Cirsium arvense) is a wide-spread invasive weed found in all parts of Clackamas County. Unlike the many native thistles found in Oregon, Canada thistle can quickly overrun an area and displace […]
It’s National Invasive Species Awareness Week!
National Invasive Species Awareness Week (February 24 -28, 2020) kicks off today! Once a year, folks from around the country take a full week to consider the many impacts that non-native invasive species […]
Weed Equipment Library
The Clackamas Soil and Water District WeedWise Program has a Weed Equipment Library which includes many excellent brands of shrub and tree removal tools and lake rakes available for use in your weed […]
February Invasive Weed of the Month: Scotch Broom
Scotch broom is a wide-spread invasive weed in our community. You have probably noticed large stands of it along our rural roads and highways, in pastures and in forests. Now is a great […]
