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. The very characteristics that made it […]
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.
Happy Holidays Welcome to the holiday edition of the Prickly Thistle. December is the time of year that the WeedWise program shifts gears. In winter months, our work changes dramatically from spending the […]
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 […]
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 […]
A WeedWise Update If you have ever visited the Clackamas SWCD and WeedWise program you know we are busy. District staff are hard at work on a variety of conservation efforts. We work […]
October is the perfect time to manage blackberry on your property. This article explains the mechanical, chemical, and cultural controls needed to eradicate this invasive.
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 […]
Puncturevine (Tribulus terrestris) is aptly named! This invasive weed has spiny seed heads on it that can easily puncture a bike tire, inflatable raft, animal paw, or footwear. Be on the lookout because […]