How To Kill Duckweed Naturally In 2023

How To Get Rid Of Duckweed There are only a few ways to get rid of
How To Get Rid Of Duckweed There are only a few ways to get rid of from

Duckweed is a small aquatic plant that grows in still or slow-moving water. It is often found in ponds, lakes, ditches, and even swimming pools. In some areas, duckweed can become a nuisance, as it can quickly take over a water body, blocking out light and oxygen, and preventing other aquatic plants from growing. Fortunately, there are some methods you can use to kill duckweed naturally in 2023.

Create Shade

One of the most effective ways to kill duckweed is to create shade over the area where it is growing. Duckweed thrives in full sun, so if you can provide shade over the affected area, it can help reduce the growth of duckweed in the long term. You can use water-tolerant trees or shrubs to provide shade, or even floating structures such as umbrellas or large pieces of fabric.

Introduce Predators

Introducing creatures that feed on duckweed is another way to control the plant. Common predators include certain types of fish such as grass carp and goldfish, as well as ducks, geese, and turtles. Keep in mind that these creatures may also feed on other aquatic plants, so you must consider the environment before introducing them.

Use Herbicides

Herbicides can be an effective way to control duckweed, although they must be used with caution. There are a number of herbicides available that are designed to target duckweed specifically, so be sure to read the instructions carefully before applying it. Also, keep in mind that herbicides can be harmful to other aquatic plants, so you may want to limit their use to small areas.

Manual Removal

Manual removal is the most labor-intensive method for killing duckweed, but it can be effective. The key is to remove as much of the plant as possible, along with its roots. You can use a net to scoop out the plant, or you can use a rake to remove it from the bottom of the water body. Be sure to dispose of the duckweed properly, as it can still spread if discarded in the wrong place.

Cover the Water

Another way to kill duckweed naturally is to cover the affected area with a tarp or other material that will block out sunlight. This will prevent the plant from getting the sunlight it needs to photosynthesize and grow. This method is most effective when used in combination with other methods such as manual removal or herbicides.

Introduce Beneficial Bacteria

Introducing beneficial bacteria into the water body can help reduce the growth of duckweed. These bacteria feed on the nutrients in the water that would otherwise be used by the duckweed, thus limiting its growth. There are several types of beneficial bacteria available, so be sure to research which one is best for your particular situation.

Limit Fertilizer Use

Finally, be sure to limit the use of fertilizers in the water body, as they can contribute to the growth of duckweed. If you are using fertilizers in the area, be sure to do so in moderation and follow the instructions carefully. Too much fertilizer can cause an overabundance of nutrients in the water, which will encourage the growth of duckweed.


Duckweed can quickly become a nuisance in ponds, lakes, and other water bodies, but there are some methods you can use to kill it naturally in 2023. Creating shade, introducing predators, using herbicides, manually removing the plant, covering the water, introducing beneficial bacteria, and limiting fertilizer use can all help reduce the growth of duckweed in the long run. With the right combination of these methods, you can keep your water body free of duckweed and enjoy a healthy, balanced aquatic environment.

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