Spotted water hemlock in a forest.

Control Spotted Water Hemlock

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


Manual/Mechanical Control:

If you are considering how to remove spotted water hemlock, physically plowing or mowing the area and digging up the roots can be an effective method of control.


Herbicide Control:

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

  1. Liquid 2, 4-D (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants. Most effective on treatment areas larger than a half-acre, this allows longer contact exposure time.


Treatment Tips:

When treating spotted water hemlock,

  • Treat when the plants are established and actively growing.
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