The origins of the Weed Smackdown date back to plans to remove the Marmot dam, which came down in 2007.  This historic event prompted area agencies and partners to work together to restore salmon habitat in the Sandy River. For the first time in nearly a century, salmon could now swim freely from the mouth back up to the headwaters to spawn.  The Sandy River Watershed Council and the Weedwise Program at the Clackamas Soil and Water Conservation District (CSWCD) are working to protect these investments by ensuring noxious weeds don’t take over the habitat that has been restored.

Watershed Council staff survey for a “dirty dozen” list of noxious weed invaders, species qualifying for “Early Detection and Rapid Response” (EDRR) status.  EDRR programs are based on the premise that more recent invasions can be controlled whereas more established invasive plants like English ivy, Himalayan blackberry, and Scotch broom are too widespread for regional control.  On the list of high priority weeds for early detection and treatment is Policeman’s helmet, a deceptively enticing garden escapee.

This streamside invader grows up to ten feet tall, producing white to purple flowers atop reddish stems throughout the summer.  Exploding pods disperse thousands of seeds per plant up to 15 feet, aiding its spread and sending seeds downstream.  Where it takes hold, Policeman’s helmet can dominate other native forest plants, degrading critical river habitat.