Control Flat Stem Pondweed

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

Click here to read more about identifying this plant.

Manual/Mechanical Control:

If you are considering how to remove flat stem pondweed, physically pulling this plant and digging up the roots can be a somewhat effective method of control. However, physical control can be difficult. Flat stem pondweed can re-grow from any roots or seeds remaining in the water.

Herbicide Control:

There are multiple options for how to kill flat stem pondweed 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. Hydrothol (for lakes) – granules that are broadcast over the plants.
3. Dibrox (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants, fast acting. Will offer some control.

Treatment Tips:

When treating flat stem pondweed,

• Spritflo can be used at the first signs of growth.
• With other herbicides, treat when the plants are established and actively growing.