Curly-leaf pondweed is a submerged perennial that resembles many native pondweeds. Care must be taken to correctly identify this species. Rigid, reddish-green, oblong leaves have distinct, finely toothed, wavy edges. The plant’s flat, reddish-brown stem grows in water depths from one to 16 feet. Most reproduction is from winter buds, called turions.
Confirmed observations of Curly-leaf pondweed submitted to the NYS Invasive Species Database. For more information, visit iMapInvasives
Curly-leaf pondweed is tolerant of low light and low water temperatures and invades shallow as well as deep water.
Threats & Impacts:
New plants form under ice cover during late winter, making curly-leaf pondweed one of the first plants to emerge in early summer. Plant die-offs in midsummer may cause a critical loss of oxygen.
Control methods for curly-leaf pondweed include physical, mechanical, or chemical techniques. There are many native look-alike pondweeds. Please confirm identification before beginning any management program.