Canada thistle (Cirsium arvense) is a wide-spread invasive weed found in all parts of Clackamas County. Unlike many native thistles found in Oregon, Canada thistle can quickly overrun an area and displace native […]
Archive | Weeds
Detecting, controlling, and eradicating invasive plants are topics captured in the Weeds category. Invaders affect wildlife and crop production. In some cases they pose health risks to people and animals.
National Invasive Species Awareness Week: February 22 – 26
National Invasive Species Awareness Week (February 22 -26, 2021) 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 […]
Manage Weeds with our Weed Tool Library!
The Clackamas Soil and Water District WeedWise Program has a Weed Tool Library. This free resource includes shrub and tree removal tools and lake rakes available for use in your weed control project. […]
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 […]
January Invasive Weed of the Month: English Ivy
English ivy (Hedera helix) may conjure up images of cozy, country cottages, but don’t be deceived. This invasive weed can destroy buildings, poison pets, and topple trees. Ivy grows quickly, requires little maintenance, […]
It’s Time to Order Native Plants
Native plants are a great way to beautify your yard, pollinator garden, or hedgerow! While wintertime may seem gloomy, the promise of a new growing season is just around the corner. Now is […]
December Invasive Weed of the Month: English Holly
Green leaves and red berries of English holly English holly (Ilex aquifolium) is a popular evergreen frequently noticed during the month of December when festive decorators “deck the halls with boughs of holly”. […]
Explore our Woody Weed Guide
Woody Weeds of Clackamas County People who work with or manage invasive weeds on their property will be happy to check out a recent WeedWise publication entitled, Woody Weeds of Clackamas County. This […]
November Invasive Weed of the Month: Spurge Laurel
Spurge laurel (Daphne laureola) is neither a spurge nor a laurel, but rather an invasive plant in the Daphne family. This perennial plant has poisonous berries, spreads aggressively in our native forests, and […]
