Water primrose

Invasive water primrose is known to grow in the lower Willamette Valley primarily in slow-moving waters and surrounding riparianRiparian areas The land alongside a stream, creek, river, or floodplain zones. It creates masses of persistent roots that spread quickly. Water primrose is a top priority species in the 4-County CWMA boundary and all are encouraged to report any sightings to the Oregon Invasive Species Hotline, www.oregoninvasiveshotline.org.

We have done extensive work to track and control this species in our District.

Read more about tree of heaven and other weeds from the 4-County Cooperative Weed Management Area’s fact sheets.