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. Look out for this one! One such menace is Lesser celandine (Ranunculus ficaria) which displaces more desirable plants in lawns, gardens, parks, and […]
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. Look out for this one! One such menace is Lesser celandine (Ranunculus ficaria) which displaces more desirable plants in lawns, gardens, parks, and […]
American Pokeweed The WeedWise program recently received a report of a new invasive weed in our area known as American pokeweed (Phytolacca americana). This observation comes to us from the city of Canby was it has been observed growing along a sidewalk. The affected landowner reported that the pokeweed grew rapidly to establish within one […]
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. Look out for this one! One such menace is Lesser celandine (Ranunculus ficaria) which displaces more desirable plants in lawns, gardens, parks, and […]
We have plenty of thistles growing in our area and landowners across the region are working hard to combat these prickly invaders. While most of the thistles growing in our area are invasive, some of them are actually native. Unfortunately, a recent discovery from eastern Oregon marks the addition of a new invasive thistle to […]
This past season we have seen a rise in the number of Oblong spurge (Euphorbia oblongata) sites appearing in Clackamas County. Oblong spurge is a class A noxious weed in the state of Oregon, and eradication of this species is required across the state. It is known to be highly aggressive and can displace native […]
The WeedWise Program has finalized Best Management Practices for controlling Garlic mustard. Check out this comprehensive guide today.
The WeedWise Program has finalized Best Management Practices for controlling Himalayan blackberry. Check out this comprehensive guide today.
The WeedWise Program has finalized Best Management Practices for controlling English ivy. Check out this comprehensive guide today.
The WeedWise Program has finalized Best Management Practices for controlling Tansy Ragwort. Check out this comprehensive guide today.
Staff Spotlight: Sarah Hamilton, WeedWise Specialist & CWMA Coordinator
Think twice before killing those thistles: Thistle Identification
Himalayan Blackberry BMP Now Available
Tansy Ragwort Poisons Livestock and Neighborly Relationships!
Blessed Milkthistle invading pasture lands.
Newly discovered organic herbicide shown to be safe and effective against all invasive weeds!
April’s Weed of the Month: Garlic Mustard
Combating Invasive Weeds in the Shadow of the Novel Coronavirus
Clackamas SWCD, General Manager Position Announcement: Open Until Filled
The Undesirable Beauty of Lesser Celandine
