Control Spatterdock

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

Click here to read more about identifying this plant.

Manual/Mechanical Control:

If you are considering how to remove spatterdock, physically cutting this plant and digging up the massive rhizomes 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.

1. Spritflo (for ponds with no outflow) – liquid that is poured and spreads throughout the entire body of water, offers extended control.
2. Liquid 2, 4-D (for ponds or lakes) – liquid that is diluted with water and sprayed directly on and over the plants. Most effective on treatment areas larger than a half acre, this allows longer contact exposure time.
3. Navigate 2, 4-D (for ponds or lakes) – granules that are broadcast over the plants. Most effective on treatment areas larger than a half acre, this allows longer contact exposure time.
4. Cattail and Water Lily Control (Imox + surfactant) (for ponds or lakes) – liquids that are mixed and diluted with water and sprayed directly on the plants. Will be absorbed only through the leaves and will offer some control.

Treatment Tips:

When treating spatterdock,

• Spritflo can be used at the first signs of growth.
• 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 and will pull more of the herbicide to the roots as well.
• With 2, 4-D, treat when the plants are established and actively growing. 2, 4-D options generally do not impact root systems with early season treatment. May require multiple treatments in the spring or summer to completely control spatterdock down to the roots.