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Curly-Leaf Pondweed in Minnesota Lakes: What You Need to Know

Curly-leaf pondweed is an invasive plant that has spread across many Minnesota lakes. It has curly, wavy leaves and can grow up to 15 feet tall.


This plant can cause significant problems for the environment and recreational activities in our lakes. Curly-leaf pondweed is found in over 700 lakes across Minnesota, including Lake Independence. This widespread presence highlights the importance of management efforts to control and prevent the spread of this invasive plant.

Impact on Minnesota Lakes:


1. Ecological Impact:

Curly-leaf pondweed grows quickly and takes over areas where native plants should be. This reduces the variety of plants and animals in the lake, making it less healthy and balanced.


2. Water Quality:

When curly-leaf pondweed dies off in mid-summer, it releases nutrients into the water. These nutrients can cause algal blooms, which are rapid increases in algae. Algal blooms can make the water green and murky and reduce oxygen levels, which is bad for fish and other aquatic life.


3. Recreational Impact:

Thick mats of curly-leaf pondweed can get tangled in boat propellers, fishing lines, and make swimming unpleasant. It can cover large areas of the lake, making it hard to enjoy activities like boating, fishing, and swimming.


4. Economic Impact:

Managing curly-leaf pondweed can be expensive. The presence of this plant can also lower property values around the lake, as it makes the lake less attractive and enjoyable.


Management Strategies:


1. Mechanical Harvesting:

This involves cutting and removing the plants from the lake. It's like mowing the lawn underwater. While this can help temporarily, it needs to be done regularly to keep the plant under control.


2. Chemical Treatments:

Herbicides can be used to kill curly-leaf pondweed. These chemicals must be applied carefully to avoid harming other plants and animals. Sometimes, multiple applications are needed to be effective.


3. Biological Control:

Scientists are looking into using natural predators, like certain types of insects, to control curly-leaf pondweed. This method is still being researched and is not widely used yet.


4. Preventative Measures:

Preventing the spread of curly-leaf pondweed is crucial. Boat cleaning stations and public education campaigns help make sure boaters clean their equipment to avoid spreading the plant to other lakes.


5. Integrated Management:

Using a combination of methods—mechanical, chemical, biological, and preventative—provides the best chance of controlling curly-leaf pondweed effectively.

Future Directions:


1. Research:

Ongoing research aims to find new and better ways to control curly-leaf pondweed, including developing more effective herbicides and biological control methods.


2. Community Engagement:

Educating the public about the importance of cleaning boats and equipment can help prevent the spread of curly-leaf pondweed to other lakes. Community involvement is crucial for long-term success.


3. Policy Development:

Stronger rules and better enforcement can help limit the impact of curly-leaf pondweed. Policymakers are working to create and implement measures that protect our lakes from invasive species.



Curly-leaf pondweed is a significant problem for Minnesota lakes, affecting the environment, water quality, recreation, and local economies. Managing this invasive plant requires a mix of methods, ongoing research, community involvement, and strong policies to keep our lakes healthy and enjoyable.


For more information, visit the Minnesota Department of Natural Resources (DNR) website at []( or contact the Minnesota DNR Invasive Species Program at or (651) 296-6157.

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The water level of Lake Independence has risen above the slow no-wake level and we are now in a no-wake restriction for the entire lake. Please be mindful of your speed and wake to ensure the safety of all boaters and the protection of the shoreline. Thank you for your cooperation.

2024 Calendar of Events


Saturday February 17


Sunday, March 2

Annual Members Meeting

Camp Ihduhapi

Saturday, April 20, 1:00 PM

4th of July Flotilla - CANCELLED DUE TO WEATHER 

On the Lake!

Thursday, July 4, 1:00 PM

AIS Survey: Starry Stonewort
On the lake

Monday, August 5, 4:00 PM

Trolley Crawl

Maple Park

Sunday, September 15, 1:00 PM

Oktoberfest in September Picnic

Lakeshore Park

Saturday, October 5, 11:30 AM

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