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Getting rid of lily of the valley flowers can be done with persistence, but it’s a challenge worth tackling if this fragrant plant has taken over your garden.
If you’re looking to get rid of lily of the valley flowers for good, you’ve landed in the right place because these delicate bell-shaped blooms hide a surprisingly aggressive root system.
The key to success when you get rid of lily of the valley flowers lies not in removing the blossoms themselves, but in eliminating the underground rhizomes that keep sending up new shoots.
In this post, we’ll break down why lily of the valley is so stubborn, the most effective ways to get rid of lily of the valley flowers, and the mistakes you’ll want to avoid so this invader doesn’t come back.
Let’s dig in and finally reclaim your flower beds.
Why You Need to Get Rid of Lily of the Valley Flowers Completely
To get rid of lily of the valley flowers permanently, you first need to understand what you’re fighting against.
These lovely white flowers are toxic to pets and humans, so leaving them in place can be a real safety concern for families with curious kids or playful dogs.
Beyond the toxicity, lily of the valley spreads like crazy through a network of underground runners called rhizomes, which can travel several feet in every direction.
Even if you cut down every single flower you see, the rhizomes stay alive underground and will happily send up new lily of the valley flowers next spring.
That’s why simply deadheading or mowing is never enough when you want to get rid of lily of the valley flowers—you have to remove the entire root system.
Understanding this growth habit is the single most important step in your battle against these persistent plants.
1. The Rhizome Problem Behind Lily of the Valley Flowers
The main reason lily of the valley is so hard to get rid of comes down to those fleshy, white rhizomes.
These underground stems store energy and have buds at every node, meaning even a tiny piece left in the soil can regenerate into a full clump.
When you dig up the plant, you might think you’ve got it all, but broken fragments often remain, ready to sprout and produce more lily of the valley flowers.
This is why effective removal requires careful, methodical digging—not a quick yank and a hope.
2. Timing Matters to Get Rid of Lily of the Valley Flowers
The best time to get rid of lily of the valley flowers is in early spring before they bloom, or in late fall after the foliage has died back.
In early spring, the rhizomes are still storing energy to push up flower stalks, so they’re easier to pull out without breaking.
In late fall, the plant is moving energy back down into the roots, which means you can remove more of that stored fuel as you dig.
Avoid tackling this task right after a heavy rain because wet soil makes the rhizomes brittle, and you’ll leave behind more broken pieces.
If you time your attack correctly, you’ll have a much higher chance of permanently getting rid of lily of the valley flowers.
Physical Removal: The Most Reliable Way to Get Rid of Lily of the Valley Flowers
When you need to get rid of lily of the valley flowers, manual removal is the gold standard method for small to medium patches.
It’s labor-intensive, but it doesn’t require chemicals and it works if you’re patient and thorough.
Here’s how to do it right.
1. Dig Deep and Wide Around the Clump
Start by loosening the soil about twelve inches away from the visible cluster of lily of the valley flowers.
Use a garden fork or a shovel to lift the entire root ball, rather than pulling on the stems which will just snap off.
Once you’ve exposed the rhizomes, gently shake off the soil and follow every single runner you can see.
It’s tedious, but chasing those white threads through the dirt is the only way to fully get rid of lily of the valley flowers from that spot.
2. Sift the Soil to Catch Every Piece
After you’ve removed the main clump, go back through the soil with your hands or a hand trowel and sift it carefully.
Look for any small white segments that might be left behind, because each one has the potential to grow into a new patch.
Some gardeners use a mesh screen or a soil sifter to make this easier for larger areas.
Take your time here, because missing just a few fragments means you’ll be back to deal with lily of the valley flowers again next season.
3. Dispose of the Plant Material Off-Site
Never toss dug-up lily of the valley into your compost bin, because the rhizomes can survive composting and spread when you use the compost.
Instead, place all the plant material in a heavy-duty trash bag and seal it tightly.
You can also leave the rhizomes to dry out on a tarp in the hot sun for a week, which kills them before you discard them.
Proper disposal is a crucial step if you want to get rid of lily of the valley flowers without accidentally creating new problem areas.
Chemical Options to Get Rid of Lily of the Valley Flowers
If your patch of lily of the valley is huge, or if physical removal isn’t an option for you, herbicides can help you get rid of lily of the valley flowers.
This approach requires care because lily of the valley is a broadleaf plant, so you’ll need a selective or non-selective herbicide that contains glyphosate.
Glyphosate is systemic, meaning it gets absorbed by the leaves and travels down into the rhizomes, killing the entire plant from the inside out.
1. Apply Herbicide at the Right Stage
For the best results when using chemicals to get rid of lily of the valley flowers, spray in late spring when the foliage is fully expanded but before the flowers fade.
At this stage, the leaves are actively photosynthesizing, which means they’ll pull the herbicide down into the root system more efficiently.
Avoid spraying on windy days to prevent the chemical from drifting onto your other prized plants.
You’ll likely need to reapply a few weeks later to catch any regrowth from stubborn rhizomes.
2. Use the Cut-and-Paint Method
A more targeted way to get rid of lily of the valley flowers with chemicals is to cut each stem close to the ground and immediately paint the cut surface with herbicide.
This method uses less chemical and minimizes the risk of harming nearby plants.
Use a small paintbrush to apply the herbicide directly to the cut stem within seconds of cutting.
This allows the chemical to soak into the rhizome without spraying the surrounding area.
Smothering and Barriers to Prevent Lily of the Valley Flowers
Sometimes, you don’t need to get rid of lily of the valley flowers entirely—you just want to keep them contained to a specific area.
Smothering is a non-chemical technique that works by cutting off sunlight and oxygen to the plant.
Cover the area with several layers of cardboard or thick black plastic, and weigh it down with rocks or mulch.
Leave it in place for at least one full growing season, ideally two, to starve the rhizomes.
Another option is to install a physical barrier, like a plastic edging buried twelve inches deep, around the perimeter of the lily of the valley patch.
This won’t kill existing plants, but it prevents them from spreading into other parts of your garden.
If you combine smothering with careful digging, you can dramatically reduce your lily of the valley population.
So, Can You Fully Get Rid of Lily of the Valley Flowers?
You can fully get rid of lily of the valley flowers, but it requires persistence, thorough digging, and often multiple seasons of follow-up.
The good news is that with the right technique and timing, you can eliminate this beautiful invader from your garden.
Start with physical removal for small patches, use herbicides for larger infestations, and consider smothering if you want a chemical-free approach.
Whichever method you choose, remember that the battle is won by removing every last piece of rhizome.
Check the area regularly for the next year or two, and pull out any new shoots as soon as they appear.
Once you’ve committed to this plan, you’ll finally be free of lily of the valley flowers and can replant the area with something you actually want.
Your garden will thank you for the effort.