Close up of smooth waterhyssop flowers and leaves.

Control Smooth Waterhyssop

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


Manual/Mechanical Control:

If you are considering how to remove smooth waterhyssop, physically cutting this plant and digging up the roots can be a somewhat effective method of control.


Herbicide Control:

There are multiple options for how to kill smooth waterhyssop that offer great control.

  1. Dibrox (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants, fast acting.
  2. Spritflo (for ponds with no outflow) – liquid that is poured and spreads throughout the entire body of water, offers extended control.
  3. Hydrothol (for lakes) – granules that are broadcast over the plants.


Treatment Tips:

When treating smooth waterhyssop,

  • Treat when the plants are established and actively growing.
  • Spritflo can be used at the first signs of growth.
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