Close up of marsh dewflower.

Control Marsh Dewflower

Many people ask how to get rid of marsh dewflower. The following options can be considered for how to control marsh dewflower.


Manual/Mechanical Control:

If you are considering how to remove marsh dewflower, physically cutting this plant and digging up the roots can be a somewhat effective method of control if done before the plant seeds and all fragments are destroyed. However, this is not a suggested method of control because marsh dewflower readily reproduces from an fragments remaining in the area.


Herbicide Control:

There is an option for how to kill marsh dewflower that offers some control.

  1. Cattail and Water Lily Control (Imox + surfactant) (for ponds or lakes) – liquids that are mixed and diluted with water and sprayed over the plants.


Treatment Tips:

When treating marsh dewflower,

  • With Imox or other systemic herbicides, treatment is most effective when the plants are mature or close to full grown. This allows for more plant surface to spray enough mixture on.
    • Treat in late summer to early fall to get better kill of the root systems. At this time, plants are pulling energy into their roots to store for the winter.
  • Imox is not effective on the young plants of marsh dewflower, but it needs to be applied before the plants set seed.
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