About the Program

Since the spring of 2010, the Pierce Conservation District has been leading knotweed eradication efforts within both the Nisqually and South Prairie Creek Watersheds.

Knotweed can affect the health of an ecosystem by competing with and crowding out native vegetation, reducing nutrient inputs which can negatively affect aquatic food webs, contributing to erosion of lands, and destroying prime habitat for local fish and wildlife. Since knotweed's primary form of distribution is through root and stem fragmentation, the flowing waters of rivers, creeks and streams serve as prime candidates for its dispersal.