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”. For many people, the shiny, dark green leaves and red berries of holly are synonymous with the holiday season. This popular plant, however, is not native to Oregon. In fact, […]
My name is Hayden Jorde and I am a WeedWise Technician. I am originally from the southwest and I have spent much of my career working outdoors. To me, the most interesting facets of natural resource work are the interactions between human and natural systems. I have an ungraduated degree from the University of Arizona […]
The Clackamas Soil and Water Conservation District (CSWCD) is looking for qualified contractors to perform invasive weed control and restoration planting on multiple project sites within Clackamas County. Categories of work may include: Manual Site Preparation and Maintenance; Mechanical Site Preparation and Maintenance; Planting; Survey and Monitoring; Aquatic Site Preparation, Maintenance, and Survey and Monitoring; […]
The Scourge of 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 is increasingly being found in Clackamas County. Native to Europe, spurge laurel was introduced in Oregon as […]
The Thorn in Our Side Himalayan blackberry (Rubus armeniacus) tantalizes us with its sweet fruits in the summer and tortures us with its prickly vines all year long. Also known as Armenian Blackberry, this widespread and aggressive weed is native to Armenia and Northern Iran. It is considered an invasive species in many parts of […]
September is the Time to Control Japanese Knotweed Japanese knotweed (Fallopia japonica) has been called a “nightmare” and a “botanical bully,” and is one of the 100 worst global invaders. These characterizations give you a pretty good idea of just how unwelcome this invasive weed is in our community. Japanese knotweed is fast-growing and hardy, […]
Puncturevine (Tribulus terrestris) is aptly named! This invasive weed has spiny seed heads that can easily puncture a bike tire, inflatable raft, animal paw, or footwear. Be on the lookout because it is beginning to make its way into Clackamas County from eastern and southern Oregon. Also known as “goathead”, puncturevine is native to southern […]
Tansy ragwort has long tormented rural landowners who graze livestock. Horses and cows are especially susceptible to this poisonous weed. In open fields, grazing animals will generally avoid eating tansy ragwort, but in heavily infested pastures they may have few other options. Contaminated hay is particularly a problem because it becomes impossible for feeding animals […]
We are very pleased to welcome a new addition to the WeedWise team! The WeedWise program is pleased to announce our newest staff member Makayla Hartness! Makayla joins our team as a new WeedWise Technician. Makayla joins the WeedWise Program’s efforts to manage invasive weeds across Clackamas County, with a focus on protecting natural areas […]
Tansy ragwort (Senecio jacobaea) is an invasive weed with a long and deadly history in the Pacific Northwest. In Oregon, it is designated as a Class B invasive weed. It is believed to have been introduced here in the early 1900s through ballast water from a ship. This plant is native to Europe and Asia […]
