Southern naiad, najas guadalupensis, produces many small leaves along the plant stem. This weed is also known as bushy pondweed. It is confused with sago pondweed. Southern naiad leaves are arranged in whorls while sago pondweed leaves are arranged oppositely in sheaths. Southern naiad leaves are only 1” long, while sago pondweed leaves can vary from 1-6”. Southern naiad leaves get gradually smaller as they get to the tip of the stem. Stems can grow to 2 feet long.
Where does Southern Naiad grow?
You can find American southern naiad growing throughout the United States. It can grow in water depths up to 15 feet deep, if water is clear.
How does naiad spread?
Southern naiad dies back each year and repopulates from seed. It spreads easily by fragmentation.
Is Southern Naiad good or bad for my pond?
Naiad provides provides habitat for young fish and invertebrates. Because this aquatic plant can easily spread through fragmentation, close management is recommended.
Natural Management Options
Early season application of Pond Dye can limit pond weed growth. Dye must be applied before growth begins and maintained throughout the year to be effective.
Grass carp can be used to control pondweed growth. Grass carp can eat 2-3 times their own body weight in vegetation per day!
Chemical Management Options
Sonar provides a long term management solution for naiad. Sonar reacts slowly, taking 30-60 days for results. However, this treatment successfully kills to the roots. The entire pond must be treated for success. This treatment option is only for ponds with little or no flow coming into the pond. Sonar AS, Sonar RTU, and Sonar One are all available options
Duckweed Destroyer is a great fast-acting, broad spectrum treatment option. This is a great choice if there are multiple weed species needing controlled. Duckweed Destroyer is also great for ponds that have algae and submerged weeds growing in the same area.