How To Get Rid Of Lilies In A Pond

You can get rid of lilies in a pond, but it takes patience and a solid plan.
 
If you’ve been wondering how to get rid of lilies in a pond without harming your fish or the overall ecosystem, you’re in the right place.
 
Pond lilies, especially water lilies and lily pads, can quickly take over the surface, blocking sunlight and stealing oxygen from the water.
 
In this post, we’ll cover how to get rid of lilies in a pond using physical, biological, and chemical methods, plus some prevention tips to keep them from coming back.
 
Let’s dive in and tackle those lilies head-on.
 

Why Getting Rid of Lilies in a Pond Is So Important

Getting rid of lilies in a pond isn’t just about looks, it’s about the health of your entire water garden.
 
When lilies in a pond multiply unchecked, they form a dense mat on the water’s surface.
 
This mat blocks sunlight from reaching submerged plants, and those plants die off, which leads to a buildup of decaying organic matter.
 
That decay process consumes oxygen, and low oxygen levels can stress or even kill your fish.
 
So, if you want to know how to get rid of lilies in a pond for good, you’re really protecting the whole aquatic food chain.
 
Let’s break down the most effective strategies for removing lilies from a pond.
 

1. Hand Pulling Is the Most Direct Way to Get Rid of Lilies in a Pond

Hand pulling is exactly what it sounds like, and it’s the most straightforward answer to how to get rid of lilies in a pond.
 
You grab the lily stems near the base and pull up the entire root system.
 
This works best for small ponds or early infestations before the lilies have established deep rhizomes.
 
The trick is to remove every piece of root, because lilies in a pond can regrow from even a small fragment of rhizome left behind.
 
You’ll want to wear gloves and use a rake or a specialized weed remover tool to help you get a better grip.
 
Set aside a few hours over a weekend and make it a regular chore, since new lilies can sprout from seeds already in the mud.
 
For larger areas, you might need to repeat this process multiple times throughout the season.
 

2. Cut Them Repeatedly to Weaken Lilies in a Pond

If pulling isn’t practical because the lilies are too widespread, cutting is your next best physical method.
 
You can use a pond weed cutter, a sharp scythe, or even a lawn mower set on low for shallow areas.
 
When you cut lilies in a pond, you’re forcing the plant to use up its stored energy to regrow leaves and flowers.
 
Do this every two weeks, and the roots will eventually starve and die.
 
The downside is that cut lily pieces will float and start decomposing, so you’ll need to remove them with a net or a skimmer right away.
 
Never leave cut lilies in a pond, because the rotting vegetation will drop oxygen levels even faster than the living lilies.
 
This method alone can take a full season, but it’s safe for fish and beneficial insects.
 

Biological Controls to Get Rid of Lilies in a Pond Naturally

If you prefer a hands-off approach, you can use biological controls to get rid of lilies in a pond.
 
This means introducing creatures that naturally eat or disturb the lilies.
 
One of the most popular options is the triploid grass carp, a sterile fish that loves to munch on aquatic vegetation.
 
Grass carp can be very effective at controlling lilies in a pond, but they need to be stocked at the right density.
 
You’ll also need a permit in many states, so check with your local wildlife agency before buying them.
 
Another biological option is to encourage ducks or geese to visit your pond, as they’ll happily nibble on young lily shoots.
 
However, large waterfowl can also dig up your other pond plants, so this is a bit of a trade-off.
 
Finally, adding beneficial bacteria to the water helps speed up the decomposition of organic matter, which can reduce the nutrient-rich mud that lilies in a pond love to grow in.
 
This won’t directly remove established lilies, but it prevents new ones from taking root as easily.
 

1. Grass Carp as a Long-Term Solution for Lilies in a Pond

Grass carp are the most reliable biological method when you’re serious about how to get rid of lilies in a pond permanently.
 
They feed on the tender young leaves and shoots, and over time, they can strip a pond of most of its vegetation.
 
You’ll need to stock roughly 5 to 10 grass carp per acre, depending on how dense the lily coverage is.
 
Remember that grass carp grow large, so they need a pond that’s at least half an acre to thrive.
 
If your pond is too small, the carp won’t survive, and they’ll be unable to get rid of lilies in a pond for you.
 
Also, grass carp won’t starve themselves, so they may start eating your prized ornamental plants once the lilies are gone.
 

Chemical Herbicides to Get Rid of Lilies in a Pond Fast

When physical and biological methods aren’t enough, you can turn to aquatic herbicides to get rid of lilies in a pond quickly.
 
These chemicals are specially formulated for water use, and they kill the lilies by disrupting their cell function.
 
The most common active ingredients are glyphosate, diquat, and fluridone, and each works a little differently.
 
Glyphosate is sprayed on the lily leaves above the water, and it travels down to the roots to kill the whole plant.
 
Diquat works fast on contact, but it only kills the parts of the lily it touches, so regrowth is likely.
 
Fluridone is a low-dose, whole-lake treatment that slowly kills all aquatic plants, so use it with caution.
 

1. How to Apply Herbicides for Lilies in a Pond

When applying any herbicide to get rid of lilies in a pond, always read the label first, and follow the dosage instructions to the letter.
 
You’ll want to treat small, 10- to 20-foot chunks of the pond at a time, with two-week breaks between treatments.
 
This staggered approach prevents the sudden die-off of too many lilies in a pond, which could cause a dangerous oxygen crash.
 
Add a surfactant to the mix, as it helps the chemical stick to the waxy surface of the lily pads.
 
And be sure to remove the dead lily material after they wilt, otherwise, the decaying plants will release nutrients that fuel the next algal bloom.
 
If you’re unsure about which product to use, contact your local agricultural extension office for recommendations tailored to your state.
 

Preventing Lilies in a Pond From Coming Back

The best way to get rid of lilies in a pond is to stop them from returning in the first place.
 
Once you clear the lilies, you’ll want to reduce the nutrients that feed them, mainly phosphorus and nitrogen.
 
You can do this by installing a fountain or aerator, which keeps the water moving and makes it harder for lilies to root.
 
Also, try to maintain a buffer of native plants around the pond’s edge, as they absorb excess runoff from your lawn or garden.
 
If you have a heavy clay soil, consider lining the pond or adding a layer of sand on the bottom to bury lily rhizomes.
 
Finally, you can introduce underwater grasses that compete with lilies in a pond for light and nutrients, giving the lilies less room to spread.
 
With a little upkeep, you can enjoy a clear, open-water pond without the constant battle against lily pads.
 

So, How to Get Rid of Lilies in a Pond?

You can get rid of lilies in a pond through hand pulling, repeated cutting, grass carp, or aquatic herbicides.
 
But the best approach is to combine a couple of these methods, like pulling in the spring and cutting all summer long.
 
Always remove the dead plant material, and treat the water to reduce nutrient levels so the lilies don’t just grow right back.
 
Getting rid of lilies in a pond takes time and consistent effort, but it’s absolutely doable with the right strategy.
 
Now you have the knowledge to clear your pond and keep it healthy for your fish, your plants, and your own enjoyment.
 
Happy pond keeping, and may your water stay lily-free for good.