Problems

Lemongrass Problems: Causes & Quick Fixes

Quick answer

Lemongrass is prone to 52 common issues - each link below is a plant-specific fix guide.

Lemongrass houseplant

Lemongrass problems

Use the guides below to diagnose and fix common issues on Lemongrass. Each problem page explains why it happens on this species and what to do first.

Or use our problem diagnosis tool to narrow down symptoms.

Common problems on Lemongrass

Likely cause: Aug 4, 2023 · Ants can cause damage to the plant by feeding on the leaves and stems, as well as protecting other pests like aphids or scale insects. In this article, we will discuss effective methods to get rid of ants on lemongrass plants

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Aphids

Medium

Likely cause: Jul 17, 2023 · Fortunately, there are several effective methods for getting rid of aphids on lemongrass plants . In this article, we will explore those methods and provide you with a step-by-step guide to ensure the health and vitality of y

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Jul 22, 2024 · Black spots on Lemongrass can often be a sign of fungal infection . Here's how to tackle it: Neem oil acts as a natural fungicide and is gentle on plants. A homemade mixture of baking soda, horticultural oil, or soap can alte

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Low humidity, underwatering, or salt build-up in soil

Quick fix: Water more consistently; flush soil with clear water to remove salt

Full fix guide →

Likely cause: Jul 13, 2023 · Thankfully, there are several effective methods to get rid of caterpillars on your lemongrass plant without resorting to harmful chemicals. This article will guide you through these natural and eco-friendly solutions.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Conclusively, we have deduced that Lemongrass possesses high therapeutic potential due to phytochemicals , such as plant sterols, flavonoids, lignans, carotenoids, terpenoids, saponins, sulfides, and fiber, which play a preventive role in o

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Sep 29, 2025 · Lemongrass is sensitive to temperatures below 40°F (4°C), with frost producing immediate damage. It is a tropical plant, and its cells rupture when ice crystals form within them.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Aug 7, 2025 · A DIY soil mix combines two parts quality potting soil , one part coarse sand or perlite, and one part well-rotted compost. This blend offers balanced drainage, aeration, and nutrient availability for healthy lemongrass .

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Apr 6, 2025 · Wondering what to do with lemongrass leaves ? Discover creative and practical ways to use them in teas, cooking, natural remedies, and DIY home products.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Jul 22, 2024 · Lemongrass leaves curling can be a sign of environmental stressors such as extreme temperatures, inadequate light, improper watering, and low humidity . Regularly inspect your lemongrass for pests and diseases, as these can a

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Jul 22, 2024 · 🌱 Identify root rot early by spotting yellow leaves and wilting in Lemongrass . 💧🚫 Prevent root rot with proper watering, drainage, and environmental control. ️🪴 Treat root rot by trimming roots , repotting, and adjusting lon

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Jan 22, 2026 · Overwatering saturates the soil, displacing oxygen and making roots susceptible to rot and diseases like damping off . Watering from the bottom allows the soil to wick up moisture without disturbing the young plants.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Oct 18, 2025 · As lemongrass grows , it produces new shoots (tillers) from the base, gradually expanding into a wider clump. In containers, this eventually leads to pot-bound conditions where roots circle the container and growth slows.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Downy mildew is a fungal disease that affects many plant species, including lemongrass . It is characterized by the development of fuzzy, grayish-white patches on the leaves, which eventually turn yellow and die.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Jul 22, 2023 · However, like any plant, lemongrass can sometimes experience drooping or wilting leaves , which can be concerning for plant owners. In this article, we will explore the common reasons why your lemongrass plant may be drooping

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Keep the leaves on the plant over winter to protect the stems and trim any dead leaves back in spring. Your plant should grow back well when the weather warms in the next spring.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Lemongrass can start turning brown because of 1) aging, 2), underwatering, 3), overwatering, 4), too little light, 5) too much light, 6) cold temperatures, 7) nitrogen deficiency, 8) pest damage, and 9) plant diseases.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Nov 25, 2025 · Common signs of heat stress in lemongrass include yellowing or browning leaves, reduced growth rates, and a decrease in essential oil production . If you notice these symptoms, adjust your care routine by providing more shade

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Lemongrass (Cymbopogon citratus) does best at 21-29°C (70-85°F) and around 50-70% (outdoor) relative humidity. It is frost-tender, so it lives indoors year-round in most of the US and UK and must come in before the first autumn frost.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Leaf Drop

Medium

Likely cause: Jul 22, 2024 · Lemongrass , like any plant, communicates through its leaves . Yellowing leaves often signal a cry for help, possibly due to overwatering or nutrient deficiencies.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Aug 26, 2025 · This study evaluates the phytochemical composition, antimicrobial activity, cytotoxicity, antioxidant potential, and toxicity profile of Cymbopogon citratus ( lemongrass ) leaf extract.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Humidity for lemongrass Lemongrass sits happiest at around 50-70% (outdoor) relative humidity. Loves humidity. The usual low - humidity tell is crisp brown leaf tips and edges while the soil moisture is fine - a sign the air, not the wateri

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Jul 24, 2023 · If you have noticed mold on your lemongrass plant, it is important to take immediate action to prevent it from spreading and harming your plant. In this article, we will discuss some effective methods to get rid of mold on le

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Nov 25, 2025 · The Yellow Mosaic Virus (YMV) is a significant threat to lemongrass plantations worldwide. Symptoms of YMV infection include yellowing or mottling of leaves, stunted growth, and reduced plant yield.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: 5 days ago · The core lemongrass sun requirements dictate that the plant needs full sun to reach its full potential. In gardening terms, this means at least six to eight hours of direct, unfiltered light every single day.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Nov 26, 2025 · Get expert advice on common lemongrass care issues, including overwatering, pests, and nutrient deficiencies. Learn how to troubleshoot and solve problems with your lemongrass plants for a healthier harvest.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Nov 26, 2025 · If left unchecked, overwatering can lead to root rot and kill your lemongrass plant. To address this issue, reduce watering frequency immediately and make sure the pot has proper drainage holes to prevent waterlogged soil.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: May 1, 2025 · Lemongrass is a tropical grass grown primarily as a flavoring for foods and beverages. Here's everything you need to know about growing lemongrass at home.

Quick fix: Follow extension or botanical guidance for Lemongrass plant leaning; adjust care before applying broad treatments.

Full fix guide →

Likely cause: If you’re working with poor soil - whether it’s sandy, compacted, or low in nutrients - you can still cultivate healthy lemongrass plants by improving drainage , amending the soil, and applying consistent care. Here’s a step-by-step guide t

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Powdery Mildew (Erysiphe spp.): Powdery mildew presents as a white powdery substance on the surfaces of lemongrass leaves . Proper air circulation, regular pruning, and applying fungicides are effective measures for preventing and treating

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: May 4, 2025 · Learn this gardening post to know why the lemongrass plant turning purple , what are the main reasons and how to care for the lemongrass plant from this problem.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Dec 7, 2024 · But sometimes, lemongrass leaves can turn an unexpected reddish color, causing concern for plant owners. Red lemongrass leaves often signal an underlying issue that needs attention. Various factors can cause this color change,

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Aug 7, 2025 · Lemongrass roots are fibrous, spreading horizontally to form a dense, shallow network rather than a deep taproot. This root structure anchors the plant securely in the soil and is responsible for absorbing water and nutrients.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Root Rot

Medium

Likely cause: Overwatering in cool or dormant periods

Quick fix: Reduce watering and repot in fresh well-draining mix

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Likely cause: Jul 13, 2023 · However, sometimes you may notice that your lemongrass plant is falling over or leaning to one side, which can be concerning for any plant enthusiast. In this article, we will explore the reasons behind this issue and provide

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: In a flower bed it makes a nice, green leafy companion to small flowers such as pansies. It is also more tolerant of hot weather than curly parsley (which can struggle during the peak of summer) and is frost tolerant.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Jul 24, 2023 · pH Levels: Lemongrass prefers slightly acidic to neutral soil with a pH range of 6.0 to 7.5 . Testing your soil’s pH levels can help determine if any adjustments are necessary. If the soil is too acidic, adding lime can raise

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Nov 25, 2025 · Learn how to identify, prevent, and control lemongrass spider mite infestations using organic and chemical methods, plus essential preventative measures.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Nov 26, 2025 · Keep an eye out for signs of stunted growth , such as slower-than-usual height gain or a lack of new growth. This could be indicative of nutrient deficiencies, pests, or diseases affecting the plant’s development.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Sep 25, 2024 · Scorched Leaves : In hot climates, intense afternoon sun can scorch the leaves . Provide some shade during the hottest part of the day. Sunburn : Newly planted lemongrass may be susceptible to sunburn if transplanted directly

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Oct 18, 2025 · Several factors can cause thin stalks : insufficient nitrogen, inadequate sunlight, inconsistent watering, or the plant being too young. Ensure you’re fertilizing regularly, providing full sun, and being patient-stalks thicke

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Thrips

Medium

Likely cause: Jul 26, 2023 · Fortunately, there are several effective methods to get rid of thrips and protect your lemongrass plant. In this article, we will explore these methods in detail.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Are you searching for Lemongrass Leaves png hd images or vector? Choose from 50+ Lemongrass Leaves graphic resources and download in the form of PNG, EPS, AI or PSD.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Mar 30, 2026 · Lemongrass , with its vibrant green stalks and invigorating citrusy aroma, is a relatively easy herb to grow, but even this resilient plant can suffer if its watering needs aren’t met.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

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Likely cause: Mar 18, 2026 · Lemongrass (Cymbopogon citratus) evolved in tropical and subtropical environments where moisture is abundant and consistent. A 2023 study published in Plants tested four ornamental grass species under water deficit conditions

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Jun 29, 2023 · Powdery mildew is a fungal disease characterized by a white powdery growth on the surface of leaves and stems. It can cause leaf distortion and stunted growth if left untreated.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Jul 22, 2024 · Less Susceptible Pests: While it's a tough cookie, lemongrass may still occasionally attract aphids and whiteflies , but it's less likely to be troubled by soil-dwelling pests like nematodes due to its strong root system.

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Wilting

Medium

Likely cause: May 5, 2026 · Lemongrass usually wilts because the clump is too dry, too wet, cold-stressed, rootbound, or starting to rot at the base after staying soggy. Wilting lemongrass means the blades are losing support because the roots or crown ar

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Nov 25, 2025 · One of the most notable benefits of using lemongrass for wind protection is its ability to withstand strong gusts and reduce the impact of flying debris. The herb’s sturdy stems can absorb shock waves from powerful winds , pr

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: If you’re working with poor soil - whether it’s sandy, compacted, or low in nutrients - you can still cultivate healthy lemongrass plants by improving drainage, amending the soil , and applying consistent care. Here’s a step-by-step guide t

Quick fix: Confirm diagnosis on your Lemongrass, then address the most likely care or pest factor described in current extension guidance.

Full fix guide →

Likely cause: Nutrient deficiency or overwatering

Quick fix: Feed with balanced liquid fertiliser; check watering consistency

Full fix guide →

Frequently asked questions

How often should I water Lemongrass?

Water every 1–3 days in hot weather, keeping soil consistently moist. Reduce to every 5–7 days in cool months. Do not allow to dry out at root level during active growth. In practice, water every 2–3 days in summer; every 5–7 days in cooler months. Water when the top 3–4 cm is dry. Regular watering throughout India’s growing season; reduce in winter.

What light does Lemongrass need?

Lemongrass grows best in full sun - 6+ hours of direct sunlight daily.

Is Lemongrass toxic to pets?

Lemongrass is toxic to cats, dogs, rabbits, horses, turtles, and tortoises. Keep out of reach of curious pets and choose pet-safe alternatives for accessible spots.

How do I propagate Lemongrass?

Propagate Lemongrass from healthy stem or root divisions during active growth.

What soil is best for Lemongrass?

Use rich potting mix with 15 % perlite and 10 % compost or worm castings. Moisture-retaining but well-draining. pH 6.0–7.5. A good mix includes 50% potting mix, 30% compost, 20% coarse sand. Good drainage with moisture retention.

What humidity does Lemongrass need?

Lemongrass prefers moderate to high (50–80%); naturally suited to tropical Indian climate. Normal household humidity is usually fine.

When should I repot Lemongrass?

Repot Lemongrass every 1–2 years; lemongrass grows vigorously and fills pots quickly, ideally in spring. Signs it needs a bigger pot: clump bursting out of pot, very rapid drying after watering.

How this Lemongrass problems guide is reviewed?

Editorial policyReview board

Written by · Reviewed by LeafyPixels Review Board · Updated June 17, 2026

This Lemongrass problems problem guide was researched and written by . Problems symptoms on Lemongrass, lookalike causes, and step-by-step fixes are cross-checked against extension pest, disease, and care references before publication.

We prioritize sources that hold up under scrutiny:

  • University cooperative extension bulletins and fact sheets (Penn State, Clemson, UMD, NC State, and similar programs)
  • Botanical garden and horticultural society publications
  • Peer-reviewed plant science and veterinary toxicology references where pet safety matters (including ASPCA Animal Poison Control)
  • Established reference works on indoor plant culture

The LeafyPixels editorial team then reviews the draft for clarity, step-by-step usefulness, and fit with real apartment and home conditions-not ideal greenhouse setups. When guidance changes materially, we update the page and note the revision date.


Sources used

  1. **five to seven days** (n.d.) Insect Control Insecticidal Soap. [Online]. Available at: https://extension.colostate.edu/resource/insect-control-insecticidal-soap/ (Accessed: 17 June 2026).
  2. *Chilo suppressalis* lists lemongrass among grass hosts (2025) Chilo Suppressalis V1. [Online]. Available at: https://caps.ceris.purdue.edu/wp-content/uploads/2025/07/Chilo-suppressalis_v1.pdf (Accessed: 17 June 2026).
  3. *Chilotrea* stem borers (n.d.) Lem007. [Online]. Available at: https://nhb.gov.in/bulletin_files/aromatic/lemongrass/lem007.pdf (Accessed: 17 June 2026).
  4. 6 to 8 hours of full sun (n.d.) Lemongrass. [Online]. Available at: https://www.almanac.com/plant/lemongrass/ (Accessed: 17 June 2026).
  5. anthocyanins (n.d.) Why Do Leaves Turn Red Home Garden Series. [Online]. Available at: https://pubs.extension.wsu.edu/product/why-do-leaves-turn-red-home-garden-series/ (Accessed: 17 June 2026).
  6. aphids concentrate on soft new growth (n.d.) Online resource. [Online]. Available at: https://hgic.clemson.edu/?s=aphids (Accessed: 17 June 2026).
  7. aphids prefer (2019) Aaaahhhh Aphids. [Online]. Available at: https://blogs.ifas.ufl.edu/pascoco/2019/02/15/aaaahhhh-aphids/ (Accessed: 17 June 2026).
  8. Aphids prefer new, tender growth (n.d.) Aphids. [Online]. Available at: https://extension.umn.edu/yard-and-garden-insects/aphids (Accessed: 17 June 2026).
  9. ASPCA lists lemongrass (*Cymbopogon citratus*) as toxic to cats, dogs, and horses (n.d.) Lemon Grass. [Online]. Available at: https://www.aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/lemon-grass (Accessed: 17 June 2026).
  10. Australasian Plant Disease Notes (n.d.) DN07039. [Online]. Available at: https://doi.org/10.1071/DN07039 (Accessed: 17 June 2026).