How To Get Rid Of Periwinkle Ground Cover – Restore Your Landscape
We’ve all been there: you plant a little bit of periwinkle for its charming blue flowers, and before you know it, it’s taking over the entire yard. It is frustrating to watch a once-tame plant become an invasive nightmare that chokes out your favorite perennials.
Don’t worry—getting your garden back is entirely possible with the right approach and a little patience. In this guide, I will share the exact steps on how to get rid of periwinkle ground cover so you can reclaim your flower beds and plant what you actually want.
We will cover everything from manual digging techniques to eco-friendly smothering methods that work without harming your soil health. By the end of this article, you’ll have a clear roadmap to a periwinkle-free garden and the confidence to start your next project.
Understanding the Resilience of Vinca Minor
Before we dive into the removal process, it helps to understand what we are up against. Periwinkle, or Vinca minor, is a trailing evergreen vine that spreads through a network of creeping stems called stolons.
These stolons are incredibly efficient at survival because they can root at every single node that touches the ground. This means that if you leave even a small segment of the stem behind, it can potentially regenerate into a brand-new plant.
Furthermore, the leaves of the periwinkle plant have a thick, waxy cuticle. This protective layer makes the plant resistant to many common topical treatments, as liquids simply bead off the surface rather than being absorbed.
To successfully clear this plant, you must be more persistent than its root system. Whether you choose physical labor or natural suppression, the goal is to exhaust the plant’s energy reserves until it can no longer bounce back.
How to Get Rid of Periwinkle Ground Cover Manually
If you have a small to medium-sized patch, the most effective and environmentally friendly way to handle the situation is through manual extraction. This method is labor-intensive but provides immediate results without chemicals.
Start by watering the area thoroughly a day before you plan to work. Moist soil is much looser, which allows the long runners and deep roots to slide out of the earth with less resistance.
Grab a sturdy garden fork or a Hori Hori knife to help loosen the soil around the main clumps. Avoid using a rototiller, as this will chop the vines into hundreds of tiny pieces, each capable of growing back into a new plant.
Work in small sections, roughly three feet by three feet. Gently lift the vines and follow them back to where they enter the soil, ensuring you pull up the entire root crown for every plant you find.
Once you have cleared a section, sift through the top few inches of soil with your fingers or a hand rake. Look for any hidden white roots or dormant nodes that might have snapped off during the initial pull.
Place all the removed plant material in heavy-duty trash bags. Never add periwinkle to your backyard compost pile, as the low heat of home composting is rarely enough to kill the seeds or hardy stem fragments.
Essential Tools for Manual Removal
- Garden Fork: Better than a shovel for lifting roots without cutting them.
- Hand Trowel or Hori Hori: Perfect for precision digging in tight spaces.
- Heavy-Duty Gloves: Protects your hands from hidden debris and soil irritants.
- Kneeling Pad: Your joints will thank you after an hour of focused weeding.
The Smothering Strategy: A No-Dig Approach
For those who have large swaths of periwinkle or simply want to save their backs, sheet mulching is a fantastic alternative. This method uses the power of darkness to starve the plants of the sunlight they need for photosynthesis.
Begin by mowing the periwinkle on the lowest setting possible. This initial physical stress forces the plant to use up stored energy to attempt a recovery, making it more vulnerable to the smothering process.
Next, cover the entire area with a layer of plain brown cardboard or several layers of heavy newspaper. It is vital to overlap the edges by at least six inches to prevent any stray vines from finding a gap to crawl through.
Thoroughly wet the cardboard to help it settle and begin the decomposition process. This also creates a moist environment underneath that encourages beneficial soil organisms to break down the dying plant matter.
Apply a thick layer of organic mulch, such as wood chips or shredded bark, over the top of the cardboard. Aim for a depth of four to five inches to ensure no light reaches the soil surface below.
Patience is key with this method. It typically takes six to twelve months for the periwinkle to completely die off and for the cardboard to break down into the soil, leaving you with a clean slate.
This is a great way to how to get rid of periwinkle ground cover while simultaneously improving your soil’s organic content. By the time the vines are gone, you will have a nutrient-rich bed ready for new plantings.
Using Solarization for Faster Results
If you are working during the heat of the summer, you can use soil solarization to speed up the demise of invasive ground covers. This technique uses trapped heat to “cook” the plants and their root systems.
Clear the area of any large debris and level the ground as much as possible. Water the soil deeply, as moist soil conducts heat much better than dry soil, reaching deeper into the root zone.
Cover the area with a sheet of clear plastic. While many people think black plastic is better, clear plastic actually creates a greenhouse effect that generates much higher temperatures beneath the surface.
Secure the edges of the plastic with heavy stones, bricks, or by burying the edges in a shallow trench. It must be airtight to prevent heat from escaping and to ensure the temperatures reach the necessary levels.
Leave the plastic in place for four to eight weeks during the sunniest part of the year. The extreme heat will kill the periwinkle, along with many weed seeds and soil-borne pathogens that might be lurking.
Monitor the plastic for any tears or holes caused by animals or falling branches. Use heavy-duty tape to seal any punctures immediately, as even a small leak can significantly reduce the effectiveness of the solarization.
Chemical Control: When and How to Use It
Sometimes, despite our best efforts, a periwinkle infestation is simply too large or located in a spot where digging isn’t feasible. In these cases, targeted herbicides can be a necessary tool in your gardening arsenal.
Because of the waxy leaves mentioned earlier, standard herbicides often slide right off. To fix this, use a product that contains a surfactant, or add a few drops of dish soap to your mixture to help the chemical “stick.”
The best time to apply herbicide is in the early spring or late autumn. During these windows, the plant is actively moving nutrients to its roots, which helps pull the chemical down into the entire system.
Look for products containing triclopyr or glyphosate. These are systemic herbicides, meaning they travel through the plant’s vascular system to kill it from the inside out, rather than just burning the leaves.
Always apply chemicals on a calm day with no wind to prevent “drift.” Drift can accidentally kill your prized roses or nearby vegetables, which is a heartbreak every gardener wants to avoid.
Be prepared for multiple applications. Periwinkle is stubborn, and a single spray rarely does the job. Wait for the plant to show signs of new growth before applying a second round of treatment.
Safe Application Practices
- Wear PPE: Always use long sleeves, pants, and chemical-resistant gloves when handling herbicides.
- Read the Label: The manufacturer’s instructions are the law; follow the mixing ratios exactly.
- Protect Waterways: Never apply chemicals near ponds, streams, or storm drains to protect local wildlife.
- Keep Pets Away: Ensure children and pets stay off the treated area until the product has completely dried.
Native Alternatives to Replace Periwinkle
Once you have successfully learned how to get rid of periwinkle ground cover, you are left with a blank canvas. To prevent the invasive vines from returning, it is vital to fill that space with desirable plants.
Choosing native ground covers is a wonderful way to support your local ecosystem. These plants are adapted to your climate and provide essential food and habitat for native pollinators and birds.
Consider Wild Ginger (Asarum canadense) for shady spots. It features beautiful heart-shaped leaves and creates a dense mat that naturally suppresses weeds without becoming an invasive nuisance.
For a splash of color, Creeping Phlox is an excellent choice. It thrives in sunnier locations and produces a carpet of vibrant flowers in the spring, offering a much more diverse aesthetic than periwinkle ever could.
Pennsylvania Sedge is another fantastic option if you want a low-maintenance, grass-like look. It is incredibly hardy and can handle the dry shade that often exists under large established trees.
By planting a variety of species, you create a biodiverse garden that is more resilient to pests and diseases. This “living mulch” will keep your soil healthy and prevent invasive species from gaining a foothold again.
Maintaining a Periwinkle-Free Garden
The battle isn’t quite over once the ground is clear. Periwinkle is a persistent survivor, and you must stay vigilant for at least two growing seasons to ensure it doesn’t make a sneaky comeback.
Walk your garden once a week and look for any telltale green shoots popping up through your new mulch. If you see one, pull it immediately, making sure to get the root attached to it.
Maintain a thick layer of mulch in your garden beds. A three-inch barrier of wood chips or pine needles makes it much harder for any missed root fragments to reach the surface and begin photosynthesizing.
If your neighbor has periwinkle that is creeping toward your property line, consider installing a root barrier. A strip of plastic or metal edging buried six inches deep can stop the stolons from invading your space.
Encourage your neighbors to manage their invasive plants as well. Often, a community-wide effort is the only way to truly keep these aggressive spreaders in check and protect the local natural areas.
Frequently Asked Questions About how to get rid of periwinkle ground cover
Is periwinkle actually considered an invasive species?
In many parts of North America, yes. While it is a popular ornamental plant, it frequently escapes cultivation and enters natural woodlands. Once there, it forms dense mats that prevent native wildflowers and tree seedlings from growing.
Can I kill periwinkle with vinegar or boiling water?
While boiling water and high-strength vinegar can kill the top growth, they rarely reach the deep root system. For a plant as hardy as periwinkle, these methods usually result in the plant growing back within a few weeks.
How long does it take to completely eradicate periwinkle?
If you are using manual removal, you can clear an area in a weekend, but you will need to monitor for regrowth for about a year. Smothering methods typically take a full growing season (6-12 months) to be 100% effective.
Will periwinkle die if I just stop watering it?
Unfortunately, no. Periwinkle is extremely drought-tolerant once established. In many climates, it can survive on natural rainfall alone, even during dry summer months, making active removal necessary.
Conclusion: Reclaim Your Garden Today
Taking the first step to clear out an invasive plant can feel overwhelming, but the rewards are well worth the effort. Imagine a garden filled with diverse, native plants that hum with the sound of bees and butterflies instead of a monoculture of vines.
Remember that persistence is your greatest tool. Whether you choose to dig it out by hand or use the “set it and forget it” method of sheet mulching, you are making a positive change for your home’s landscape and the environment.
Take it one section at a time, celebrate your progress, and don’t be afraid to ask for help if the task feels too big. You have the knowledge and the plan—now it’s time to get your hands in the dirt and reclaim your beautiful garden!
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