When Kikuyu starts creeping into your lawn, garden beds, or pathways, it rarely stays contained. Because of its aggressive growth habit and deep runner system, removing it is not a one-time job. It requires the right method, proper timing, and consistent follow-up.
At The Turf Man Perth, we deal with Kikuyu invasions across buffalo lawns, couch turf, and landscaped gardens every week. This guide brings together what actually works in Australian conditions, including natural methods, chemical control, and long-term prevention.
Why Kikuyu Grass Is So Difficult to Get Rid Of?
Kikuyu is one of the most invasive warm-season grasses in Australia, and its growth pattern is the main reason it is so hard to control.
It spreads through:
- Underground rhizomes that travel unseen beneath soil and hard edges, allowing it to reappear far from the original patch
- Above-ground stolons that creep across lawns and garden beds, rooting wherever they touch soil
- Seeds that are carried by wind, birds, and even lawn equipment
What makes it more challenging is its ability to go dormant during dry periods and then recover quickly when water returns. This means even when it looks dead, it often is not.
Can You Completely Remove Kikuyu Grass?
The honest answer is that full eradication is possible in isolated areas, but in most residential lawns, it is extremely difficult.
You are usually choosing between:
- Complete removal, which requires repeated effort and strict follow-up
- Ongoing control and suppression, which is more realistic for most homeowners
If Kikuyu already covers a large portion of your lawn, managing it properly is often more practical than trying to eliminate it entirely.
The Most Effective Ways to Get Rid of Kikuyu Grass
1. Glyphosate Spot Spraying
This is the most effective method for killing Kikuyu down to the root system.
- Apply during warm months when the grass is actively growing, as this allows the chemical to travel through the plant more effectively
- Use a brush, sponge applicator, or weed wand instead of spraying broadly, which helps protect nearby plants and turf
- Repeat applications are often required because underground runners can survive the first treatment
This method is best suited for garden beds, edges, and areas where you are not trying to preserve surrounding grass.
2. Manual Removal and Digging
Manual removal works best for smaller infestations or when you want to avoid chemicals.
- Use a spade or fork to loosen the soil deeply so you can follow the runners rather than snapping them
- Remove as much of the root and runner system as possible, since even small fragments can regrow
- Return to the area after a few weeks to remove any new shoots that emerge
This method is time-consuming, but it is one of the most thorough approaches when done correctly.
3. Solarisation Using Black Plastic
Solarisation is a natural method that uses heat and light deprivation to kill Kikuyu.
- Cover the affected area with heavy black plastic or thick weed mat
- Secure it tightly with bricks, timber, or pegs so wind cannot lift it
- Leave it in place for several weeks during hot weather so heat builds underneath and destroys the grass
This method works well for clearing large patches without chemicals, although it requires patience and the right weather conditions.
4. Smothering with Mulch or Cardboard
This is another natural approach, particularly useful in garden beds.
- Lay down cardboard or several layers of newspaper over the Kikuyu
- Cover it with thick mulch to block sunlight and suppress growth
- Monitor the area regularly and remove any runners that manage to push through
While effective in reducing growth, this method usually needs to be combined with other techniques for long-term control.
5. Selective Herbicides in Couch Lawns
If Kikuyu is invading couch turf, selective herbicides can be used for suppression.
- Apply products designed specifically for couch lawns that target invasive grasses
- Expect gradual suppression rather than instant results
- Repeat treatments are typically required to maintain control
This approach is only suitable for couch lawns and does not apply to buffalo or other turf types.
How to Get Rid of Kikuyu Grass Naturally?
Getting rid of Kikuyu grass naturally requires persistence because the plant spreads through deep underground runners that are not easily eliminated. The most effective chemical-free method is solarisation, where you cover the affected area with black plastic for several weeks during hot weather to trap heat and kill both the grass and its root system.
Another approach involves smothering the grass using layers of cardboard or newspaper topped with thick mulch, which blocks sunlight and weakens the plant over time. Manual removal can also work when done thoroughly, but it is important to dig deep enough to remove all rhizomes, as even small fragments can regrow.
Natural control methods are slower than chemical options, but when applied consistently and combined together, they can significantly reduce Kikuyu spread without harming surrounding soil health.
Will Vinegar Kill Kikuyu Grass?
Vinegar can damage Kikuyu grass, but it does not provide a permanent solution. When applied, vinegar burns the leaves on contact, which can make the grass appear dead within a short period. However, this effect is only superficial because vinegar does not penetrate deeply enough to destroy the underground rhizomes and runners that allow Kikuyu to regenerate. As a result, the grass often grows back within a few weeks, especially during active growing seasons. Vinegar may be useful for controlling very small patches or surface growth, but it should be used with caution around other plants and should not be relied on as a long-term method for complete Kikuyu removal.
How to Get Rid of Kikuyu Grass from Buffalo Lawns?
Removing Kikuyu grass from buffalo lawns is particularly challenging because there are no fully selective herbicides that can eliminate Kikuyu without also damaging buffalo turf. The most effective method is careful spot treatment using a non-selective herbicide such as glyphosate, applied directly onto the Kikuyu leaves with a brush or applicator to minimise contact with the surrounding lawn.
Timing also plays an important role, as treating during cooler periods when buffalo grass is less active can help reduce stress and visible damage. This process requires patience and precision, as even small amounts of herbicide can spread within the plant and affect nearby grass, making controlled application essential for maintaining the overall health of the lawn.
How to Get Rid of Kikuyu Grass in Couch Lawns?
Couch lawns offer a better opportunity to control Kikuyu grass because selective herbicides can be used to suppress it without completely harming the couch turf. These herbicides work gradually by targeting Kikuyu growth while allowing the couch grass to recover and fill in the gaps.
In addition to chemical treatment, maintaining a strong and dense couch lawn through regular mowing, proper fertilisation, and consistent watering helps reduce the chances of Kikuyu re-establishing itself. Over time, a healthy couch lawn can outcompete Kikuyu, but ongoing monitoring and repeat treatments are usually necessary to keep the invasion under control.
How to Get Rid of Kikuyu Grass in Garden Beds?
Kikuyu grass in garden beds requires a combined approach that focuses on both removal and prevention. The first step is to remove all visible grass along with its roots and runners, ensuring that no fragments are left behind in the soil. Once cleared, installing physical barriers such as edging at a depth of at least 10 to 15 centimetres helps prevent underground runners from re-entering the area. Adding a thick layer of mulch or establishing dense ground cover plants further reduces the chances of Kikuyu regrowth by limiting access to sunlight and open soil. Regular inspection is essential, as early removal of new shoots prevents the grass from re-establishing and spreading again.
Long-Term Prevention Tips That Actually Work
Once you remove Kikuyu, keeping it out is just as important.
- Install edging or barriers around lawns and garden beds to block underground runners
- Maintain a dense, healthy lawn that can compete against invasive grasses
- Clean lawn equipment regularly to avoid spreading runners and seeds
- Inspect edges and fence lines weekly, as this is where Kikuyu usually enters first
Common Mistakes to Avoid
- Pulling Kikuyu without removing the roots, which leads to rapid regrowth
- Using vinegar as a sole solution and expecting permanent results
- Ignoring small patches, which quickly spread into larger infestations
- Cultivating the soil without removing runners, which can actually spread the problem further
Final Thoughts
Kikuyu grass is relentless, and that is exactly why it works so well as a lawn in some situations. However, when it spreads into areas where it is not wanted, controlling it requires a clear strategy and ongoing effort.
Whether you choose chemical control, natural methods, or a combination of both, long-term success comes down to consistency and a clear understanding of how Kikuyu grows and spreads beneath the surface.
At The Turf Man Perth, we always recommend focusing not just on removal, but also on building a lawn or garden system that prevents Kikuyu from returning. If you are dealing with a persistent invasion or want expert guidance tailored to your lawn type, you can get in touch with our team for professional advice and practical solutions that actually work in Perth conditions.
FAQs
How to get rid of Kikuyu grass in Australia effectively?
The most effective approach is a combination of glyphosate spot treatment, manual removal, and ongoing monitoring, especially during the growing season.
How to get rid of Kikuyu grass naturally without chemicals?
Solarisation, smothering with mulch, and repeated manual removal are the most reliable natural methods, although they require time and consistency.
Will vinegar kill Kikuyu grass permanently?
No, vinegar only damages the surface growth and does not kill the root system, so the grass usually grows back.
What kills Kikuyu grass but not other plants?
There are very few options that selectively kill Kikuyu without affecting other plants, especially in mixed lawns or garden beds. In couch lawns, some selective herbicides can suppress Kikuyu while allowing couch grass to survive, but in most other situations, careful spot application of non-selective herbicides or manual removal is required to avoid damage to surrounding plants.
How long does it take to remove Kikuyu grass completely?
It can take several weeks to months depending on the size of the infestation and the method used, with ongoing maintenance required to prevent regrowth.
