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Getting rid of lily pads in your lake starts with understanding that these aquatic plants thrive in shallow, nutrient-rich water.
If you’ve been staring at a green carpet spreading across your shoreline, you already know how quickly lily pads can take over.
Lily pads in your lake aren’t just an eyesore; they choke out sunlight, reduce oxygen levels, and make swimming or boating a hassle.
Thankfully, there are several proven strategies to kill lily pads and keep them from coming back.
In this post, we’ll break down the most effective ways to get rid of lily pads in your lake, from natural methods to chemical treatments.
Let’s dive in.
Why You Need To Get Rid Of Lily Pads In Your Lake
Before you start removal, it’s worth understanding why lily pads in your lake become such a problem in the first place.
These plants spread through thick rhizomes buried in the mud, and each pad can produce dozens of new shoots.
When left unchecked, lily pads in your lake can cover up to 40% of the water’s surface in a single season.
That dense mat blocks sunlight from reaching submerged plants, which then die and decay, robbing the water of oxygen.
Low oxygen leads to fish kills and foul smells, so getting rid of lily pads isn’t just about looks.
It’s about restoring balance to the entire aquatic ecosystem.
1. Manual Removal Of Lily Pads
The most straightforward way to get rid of lily pads in your lake is by pulling them out by hand.
This works best for small areas or when lily pads are just beginning to establish.
You’ll need a rake, a weed cutter, or a specialized aquatic weed harvester to grab the stems and roots.
The trick is to remove the entire rhizome, not just the pad on top.
If you leave any part of the root buried in the sediment, the lily pads will regrow within weeks.
For best results, tackle manual removal in early spring when the roots are weaker and before the pads have spread.
2. Cutting And Mowing Lily Pads
If you have a larger lake, you can get rid of lily pads in your lake using a mechanical cutter or a lake mower.
These tools slice the stems below the waterline, which temporarily clears the surface.
However, cutting alone rarely kills the plant because the rhizomes stay alive underground.
You’ll need to cut repeatedly every two to three weeks throughout the growing season.
This method is best used as a maintenance strategy alongside other removal techniques.
When you mow lily pads, be sure to remove the cut debris from the water so it doesn’t decompose and add nutrients back into the lake.
Natural Ways To Get Rid Of Lily Pads In Your Lake
If you prefer eco-friendly options, there are several natural methods to get rid of lily pads in your lake without chemicals.
1. Reduce Nutrient Runoff
Lily pads grow aggressively because lakes are rich in phosphorus and nitrogen from fertilizers, animal waste, and soil erosion.
By limiting nutrient inputs, you can slow lily pad growth dramatically.
Create a buffer zone of native plants around your shoreline to absorb runoff before it hits the water.
You should also avoid using lawn fertilizers near the lake, and keep grass clippings out of the water.
2. Introduce Grass Carp
Grass carp are a type of fish that eat aquatic vegetation, including lily pads.
Stocking grass carp can help you get rid of lily pads in your lake over time.
However, these fish don’t target lily pads exclusively, and they may eat beneficial plants first.
You’ll also need a permit in most states to stock grass carp, and they can only be used in enclosed lakes.
It’s a slow but chemical-free approach that requires patience.
3. Dye Or Shade The Water
Lily pads need sunlight to photosynthesize and grow new shoots.
Applying a lake dye that tints the water blue or black can reduce light penetration to the lakebed.
This won’t kill existing lily pads right away, but it will prevent new ones from sprouting.
Combine dye treatments with cutting or manual removal to stress the plants enough to die back.
Just remember that dyes are a preventive measure, not a quick fix.
Chemical Control For Lily Pads In Your Lake
When manual and natural methods fail, herbicide treatments are the most effective way to get rid of lily pads in your lake.
1. Systemic Herbicides
Systemic herbicides like glyphosate are absorbed through the leaves and travel down to the rhizomes.
This kills the entire plant, including the roots, so lily pads don’t regrow quickly.
You’ll apply the herbicide directly to the exposed pads on a sunny, windless day.
Make sure the water temperature is above 60°F for the best absorption.
Always check your state regulations because you may need a permit to use aquatic herbicides.
2. Contact Herbicides For Quick Results
Contact herbicides like diquat kill only the parts of the plant they touch.
They work fast, often within days, clearing the surface of lily pads.
However, they don’t kill the rhizomes, so lily pads will return within a few weeks.
Use contact herbicides for spot treatments, then follow up with manual removal or systemic products.
Best Time To Treat Lily Pads In Your Lake
Timing is everything when you want to get rid of lily pads in your lake.
The optimal window is late spring to early summer, when lily pads are actively growing but haven’t yet flowered.
At this stage, the plants are sending energy down to their roots, which makes systemic herbicides work better.
Avoid treating during hot summer months because the heat can stress fish and reduce oxygen levels.
Also, don’t treat all lily pads at once; it’s better to treat one-third of the coverage every two weeks.
This prevents a massive die-off that could deplete oxygen and harm your fish population.
So, How Do You Get Rid Of Lily Pads In Your Lake?
You can get rid of lily pads in your lake by combining manual removal, natural deterrents, and properly timed herbicides.
No single method works perfectly on its own, so a layered approach gives you the best chance of long-term control.
Start by cutting or pulling the visible pads, then reduce nutrients to slow regrowth.
If needed, apply a systemic herbicide in late spring to kill the roots deep in the mud.
Stay consistent with maintenance throughout the season because lily pads are persistent.
With the right strategy, you’ll reclaim your lake and enjoy open water again.
Hope this guide gives you a clear path to getting rid of lily pads in your lake for good.