What Is Duckweed?

Blue Jay Barrens Duckweed
Blue Jay Barrens Duckweed from bluejaybarrens.blogspot.com

Often referred to as the “lawn clover” of the aquatic world, duckweed is an aquatic plant that floats on the surface of the water. Duckweed is a very small plant, usually only about 2-4mm in diameter. It is made up of individual leaves, which are connected by very small stems. The leaves can be round or oval, and they have a single root hanging down from the bottom of the plant. Duckweed is a very common plant and can be found in ponds, lakes, rivers, and other bodies of freshwater.

What Are the Benefits of Duckweed?

Duckweed is highly beneficial for aquatic ecosystems. It is a natural filter that helps to keep water clean and healthy by absorbing excess nitrates, phosphates, and other nutrients that can threaten water quality. This makes duckweed an excellent choice for natural water filtration. Additionally, duckweed can provide shade and protection for fish and other aquatic creatures, helping to create a balanced aquatic ecosystem. Duckweed can also be used as a food source for some fish, ducks, and other animals.

How to Control Duckweed Growth

Duckweed can be a nuisance if it grows out of control. Fortunately, there are several ways to keep duckweed growth under control. Mechanical removal is the most common method for controlling duckweed growth. This involves removing the duckweed from the water manually. Another option is to use natural predators such as fish and turtles to consume the duckweed. Finally, chemical treatments such as herbicides can be used to reduce duckweed growth.

How to Use Duckweed for Aquaponics

Duckweed is a great choice for aquaponics systems. It can be used as a natural nutrient filter, and it can also be used to provide food for fish. Duckweed can be grown in the same tank as other plants, and it can also be used as a companion plant to provide additional shade and protection. Additionally, duckweed can be used to provide additional oxygen to the tank, which is important for healthy fish.

How to Grow Duckweed

Duckweed is a very easy plant to grow. It does not require a lot of special care or attention. All that is needed is a warm, sunny location with access to plenty of water. Duckweed can be grown in a pond or even in a large container. The only requirement is that the water temperature should stay between 60-85 degrees Fahrenheit. Duckweed should be planted in the spring or early summer, and it will start to grow quickly.

How to Harvest Duckweed

Duckweed can be harvested easily. The most common method is to simply skim it off the top of the water. Duckweed can also be harvested by hand, by scooping it from the surface of the water. It is important to harvest duckweed regularly, as it can quickly grow out of control if not managed properly.

What to Do With Duckweed

Duckweed has a variety of uses. It can be used as a natural filter for water, as a food source for fish and other animals, and as a companion plant in aquaponics systems. Additionally, duckweed can be used as a fertilizer or a compost additive. Duckweed can also be dried and used as a mulch or to make a tea fertilizer.


Duckweed is a versatile plant with many benefits. It can be used to keep water clean and healthy, provide food for fish and other aquatic creatures, and even as a fertilizer or compost additive. Duckweed is easy to grow and harvest, and is a great addition to any pond or aquaponics system.

Previous Post Next Post