Spatterdock leaves with flower close up on water

Control Spatterdock

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


Manual/Mechanical Control:

If you are considering how to remove spatterdock, physically cutting this plant and digging up the roots can be a somewhat effective method of control. However, physical control is nearly impossible. Spatterdock can re-grow from any seeds or rhizomes remaining in the water.


Herbicide Control:

There are multiple options for how to kill spatterdock that offer great or some control.

  • Liquid 2, 4-D (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants. Most effective on treatment areas larger than a half acre, this allows longer contact-exposure time.
  • Navigate 2, 4-D (for lakes) – granules that are broadcast over the plants.
  • 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 spatterdock,

  • 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.
  • With 2, 4-D, treat when the plants are established and actively growing.
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