Water lettuce bright green in group close up

Control Water Lettuce

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


Manual/Mechanical Control:

If you are considering how to remove water lettuce, physically raking or seining this plant can be an effective method of control.


Herbicide Control:

There are multiple options for how to kill water lettuce that offer great control.

  1. Dibrox (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants, fast-acting.
  2. Semera or Flumigard + surfactant (for ponds or lakes) – granules that are dissolved and mixed or liquids that are mixed and diluted with water and sprayed over the plants (early morning is best), fast acting.


When treating water lettuce,

  • Treat when the plants are established and actively growing.
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