Blue flag at water's edge with bridge in background.

Control Blue Flag

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


Manual/Mechanical Control:

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


Herbicide Control:

There is an option for how to kill blue flag that offers some control.

  1. Dibrox (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants, fast acting.


Treatment Tips:

When treating blue flag,

  • Treat when the plants are established and actively growing.
Recommended Products