Duckweed
Q.

duckweed

kkillg added on May 2, 2016 | Answered

Can I use copper sulfate to kill duckweed in pond water that I irrigate the garden with?

    A.
    A.Answers to this queston: Add Answer
    Downtoearthdigs
    Certified GKH Gardening Expert
    Answered on May 4, 2016

    We do not recommend the use of copper sulfate to kill Duckweed.
    Here is an article with more information.

    https://www.gardeningknowhow.com/plant-problems/weeds/duckweed-control.htm

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