For three seasons running, a rotating group of volunteers has spent Saturday mornings pulling Japanese knotweed from the banks of the Millrace River. This year they covered nearly four miles, a record for the effort, and reopened stretches of shoreline that had been swallowed by the fast-spreading plant.
Knotweed is stubborn. It crowds out native willows and sedges, its shallow roots do little to hold soil, and even a fingernail-sized fragment can start a new stand downstream. Clearing it by hand is slow work, and the plant almost always tries to come back.
What comes next
Organizers say the visible progress is encouraging but fragile. Long-term control depends on returning to the same sites year after year until the root network is exhausted.
- Cut stems are bagged rather than composted to prevent regrowth
- Native plugs are planted where the canopy has been reopened
- New volunteers are trained to identify knotweed before the season begins
The group is asking riverfront property owners to report new patches early, when a stand is small enough to handle in a single morning.
Related: Environment · the Millrace riverfront plans
Further reading: about invasive species
