Phragmites, also called common reed, is one of the most familiar sights along Delmarva’s marshes, ditches and pond edges. The non-native strain forms dense stands taller than a person, crowds out the native plants that hold a shoreline together and feed wildlife, and closes off the view of the water that owners value most.
Why mowing doesn’t work on its own
Most of the plant is underground. Phragmites spreads through a network of rhizomes, underground stems that store energy and send up new shoots. Mowing or cutting removes the part you can see and leaves that network intact. The stand comes back the next season, often just as thick, and keeps spreading along the shoreline while it does.
Cutting still has its place. It just has to be part of a plan rather than the whole plan.
What actually removes it
Lasting control comes from an integrated plan, carried out over more than one season:
- Site assessment. How big the stand is, what’s growing around it, whether it sits in or beside a tidal wetland, and whether any of the work needs a permit.
- Targeted herbicide application. Using products labeled for use around water, applied to the stand itself, at the time of year when the plant is moving energy down into its roots.
- Mechanical removal. Once the plants have died back, the standing dead material is cut and cleared so the shoreline can recover and new growth is easy to see.
- Follow-up. Checking the site the next season and treating any regrowth before it re-establishes.
Where the reed is gone, the shoreline needs something to hold it. Replanting with native species, or a living shoreline on eroding banks, closes the gap before phragmites or erosion fills it again.
Start with the assessment
Every site is a little different: a backyard pond edge, a community’s stormwater facility and a tidal marsh frontage each call for a different mix of steps. A site assessment tells you how large the job is, what it involves and how long it will take before the shoreline is yours again. More on how we approach this is on our ecological and natural resource solutions page.