Giant reed in large group.

Control Giant Reed

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


Manual/Mechanical Control:

If you are considering how to remove giant reed, physically cutting this plant and digging up the roots can be a somewhat effective method of control. Frequent mowing has sometimes been successful.


Herbicide Control:

There is an option for how to kill giant reed that offers great 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 giant reed,

  • 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.
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