# How to Get Rid of Lalang Permanently | GrassCutting.my > Lalang regrows from underground rhizomes — cutting alone won URL: https://grasscutting.my/guide/how-to-get-rid-of-lalang-permanently/ Last-Modified: 2026-06-11 Landed homeowners in Petaling Jaya frequently face a frustrating battle with aggressive, fast-growing weeds. The real issue is that most people only treat the visible leaves while ignoring the massive underground root system. We see this directly at GrassCutting.my, where our teams have managed overgrown lawns across PJ and Damansara since 2018. Learning how to get rid of lalang requires a strategic approach rather than just a sharp mower blade. This relentless grass can quickly trigger complaints from neighbours and heavy local council fines if left unchecked. Our goal here is to examine the weed’s biology, break down a proven systemic treatment plan, and set realistic expectations. ## Why Lalang Is So Persistent _Imperata cylindrica_ is one of the most persistent weeds in Malaysia because of its massive underground rhizome network. These subterranean stems can grow up to 1 metre deep into the Selangor soil. We frequently encounter properties where the cut leaves are gone, but the roots remain completely unfazed. New blades will simply push up within a matter of weeks. This biological resilience is the fundamental problem with trying to clear the plant by cutting alone. We have found several reasons why this weed survives standard maintenance: - **Deep Root Systems:** The rhizomes store massive amounts of energy below the mower blade line. - **Fire Resistance:** The root network actually thrives after a surface fire. - **Rapid Regrowth:** A single hectare can produce up to 6 metric tons of new rhizome mass quickly. - **Chemical Defence:** The plant releases chemicals that suppress the growth of competing native grasses. We typically rely on selective herbicide spraying [/weed-control-racun-spray/ →](/weed-control-racun-spray/) applied correctly to reach the hidden roots. That requirement demands a very specific, systemic action plan. A proper chemical application translocates through the plant tissue to completely destroy the deep rhizome network. Before any spraying, our heavy-duty vacant land service [/vacant-land/ →](/vacant-land/) clears the visible overgrowth to effectively prepare the site. Durable control means the deep rhizomes have to die too. ## The Right Approach: How to Get Rid of Lalang Our permanent lalang control always follows a strict, multi-step sequence. First, cut the visible growth down to the ground. This initial step is not the kill, but rather crucial site preparation. We recommend using proven glyphosate-based formulas, like Roundup 41% or Ecomax, which are highly effective in Malaysia — our explainer on what selective herbicide (racun) spraying is [/guide/what-is-selective-herbicide-racun-spraying/ →](/guide/what-is-selective-herbicide-racun-spraying/) covers how these work. You then apply this systemic herbicide so the surviving leaves can absorb and translocate it. The active ingredient travels deep into the 1-metre root system. Our teams wait two to three weeks for the systemic action to completely starve the plant. You must then repeat the spray on any stubborn new shoots that appear. This targeted follow-up ensures no small fragments survive the initial chemical application. ![Cleared ground where lalang was treated and removed](/images/content/cleared-ground-where-lalang-was-treated-and-remove.webp) ### The Long-Term Treatment Timeline We consider permanent removal to mean two to three rounds of systemic spraying over a six to twelve-month period. The first round knocks back the main rhizome network significantly. The second round catches the isolated root fragments that managed to survive. We use a third round, if needed, to handle any seedlings that emerged from the soil seed bank. New seeds can also easily blow in from neighbouring Damansara properties. Consistency is the absolute secret to keeping the land completely clear. ## Repeat Treatment Schedule We always emphasise that timing your applications correctly is just as important as the chemicals you use. A structured schedule prevents the root system from recovering between sprays. This typical protocol spans several months to ensure total eradication. | Round | Timing | Action | | --- | --- | --- | | 1 | Initial | Cut visible growth, then spray surviving leaves | | 2 | 6-8 weeks later | Spot-spray any new shoots from rhizome fragments | | 3 | 4-6 months later | Catch any late emergence; reassess | | Ongoing | Annual or bi-annual | Watch for re-establishment from neighbouring lots | ![Lalang rhizome root system spreading underground](/images/content/lalang-rhizome-root-system-diagram-underground-spr.webp) We structure these specific intervals to hit the plant exactly when it is most vulnerable. Sticking to this exact timeline prevents the weed from regenerating its energy stores. Homeowners who skip the second round often see the grass return at full strength within a few months. ## Why Cutting Alone Doesn’t Work We regularly see property owners try to control the issue by aggressive, repeat cutting. The theory assumes that if the leaves never get to mature, the rhizomes will eventually starve. In practice, this completely fails in Selangor’s tropical climate. Our crews inspect lawns in PJ where the grass stays alive indefinitely, just shorter. The growth rate is fast enough that even fortnightly cuts leave the rhizomes with ample photosynthesis. The extensive root network simply waits below the surface for you to miss a week. We consider systemic spraying to be the only durable answer for boundary fence infestations. Mowing-only lawn care never solves the problem because the plant waits for the next gap. It will reappear almost overnight once the cutting stops. ### The Legal Risks of Unmaintained Land Our clients are often surprised by the serious legal consequences of relying on failed cutting methods. Local authorities are cracking down heavily on unmaintained vacant lots. In 2026, the Petaling Jaya City Council (MBPJ) expanded its i-Sekat system to issue heavy penalties. > “Property owners with outstanding grass-cutting arrears or overgrown vacant lots can now be blocked from renewing business licences and accessing city services.” We always recommend eliminating the liability entirely rather than just trimming it. This strict council enforcement means a fast-growing weed can quickly escalate into a massive administrative headache. Ignoring the root cause will eventually cost you far more than a simple herbicide treatment. ## What Reasonable Expectations Look Like We know the term “permanent” definitely needs a realistic qualifier in tropical landscaping. Even after a successful three-round treatment, the grass can easily re-establish from windblown seeds. These adjacent overgrown spaces are extremely common in Petaling Jaya and Damansara. Our maintenance strategy always includes periodic monitoring and targeted spot-spraying as needed. Realistic expectations mean planning for twelve to eighteen months of solid control after a thorough initial treatment. This approach keeps the borders of your property safe. ### Building a Defensive Strategy We strongly advise customers to add a quarterly spray-only visit on top of their recurring cutting plan [/recurring/ →](/recurring/) . For homeowners surrounded by undeveloped land, this is the most durable answer for proactive prevention. A dedicated spraying schedule provides an excellent defensive barrier. Our primary goal is to catch those new arrivals before they ever have a chance to establish deep roots. Total eradication is a journey rather than a single event. A single mature plant can release thousands of seeds into the wind during the dry season. ## Conclusion We want to help you solve this persistent problem once and for all. Mastering how to get rid of lalang takes patience, the right systemic products, and a consistent schedule. Surface cutting will only drain your budget and leave the massive root system completely intact. Our team is always ready to step in and protect your landscape investment. Take a walk around your property lines this week to inspect for any early signs of re-emergence. Schedule a targeted herbicide application immediately if you spot any new shoots. ## Frequently Asked Questions Why does lalang keep growing back? Lalang spreads from underground rhizomes, so cutting tops it but doesn't kill it. The rhizomes regenerate the plant within weeks, often denser than before. Can you kill lalang for good? Systemic spraying plus repeat treatment suppresses the roots over time. 'Permanent' takes 2-3 rounds; ongoing watch is still needed because seeds blow in from nearby lots. Will burning lalang kill it? No — burning kills the leaves but the rhizomes survive. Lalang actually regrows aggressively after fire, which is why it dominates land disturbed by burning.