If you have a thriving herb garden or love ordering takeout with fragrant herbs, you might find yourself wondering, can dogs eat lemongrass? The short answer is no, dogs should not eat this plant. While a quick nibble of a single leaf is rarely a medical emergency, lemongrass is considered toxic to canines and can cause uncomfortable digestive issues.
The primary danger comes from the specific natural compounds found within the plant’s stalks and leaves. Whether your dog is grazing in the backyard or trying to snatch a piece of food dropped from the kitchen counter, it is important to keep lemongrass out of their reach and understand what to do if they accidentally ingest it.
Why Is Lemongrass Toxic to Dogs?
The American Society for the Prevention of Cruelty to Animals (ASPCA) classifies lemongrass as toxic to dogs, cats, and horses. The plant contains cyanogenic glycosides and natural essential oils that a dog’s digestive system cannot properly process.
When a dog chews and digests the fibrous stalks or leaves, these compounds are released into their system. While a massive amount of the plant must be consumed to cause severe cyanogenic poisoning, even small amounts of the raw plant can easily trigger severe stomach upset.
Here is a breakdown of the specific risks associated with different forms of the plant:
| Lemongrass Form | Toxicity Level | Primary Hazard |
| Fresh Leaves | Mild to Moderate | Fibrous texture causes stomach irritation; contains toxic glycosides. |
| Thick Stalks | Moderate | Choking hazard, potential intestinal blockage, and chemical toxicity. |
| Dried Herb | Mild to Moderate | Concentrated oils can still cause vomiting and diarrhea. |
| Essential Oil | Severe | Highly concentrated; can cause liver damage and neurological issues. |
What Happens If a Dog Eats Lemongrass?
If your dog manages to eat a portion of this grassy herb, their reaction will depend heavily on their size, their individual sensitivity, and the amount they consumed. Most dogs will experience localized gastrointestinal distress.
Because the leaves are highly fibrous and tough, they can also act as a physical irritant to the stomach lining, prompting the body to forcefully expel the plant material.
Watch for these common symptoms if you suspect your dog has been grazing on this plant:
| Symptom | Typical Onset | Severity Level |
| Drooling / Smacking Lips | Within 1-2 hours | Mild (Signs of nausea) |
| Vomiting | Within 2-6 hours | Moderate (Body attempting to clear toxins) |
| Diarrhea | Within 6-12 hours | Moderate |
| Lethargy / Weakness | Within 4-12 hours | Moderate to Severe |
| Abdominal Pain | Within 2-6 hours | Moderate |
The Extreme Danger of Lemongrass Essential Oil
While the live plant is mildly to moderately toxic, lemongrass essential oil is a completely different story. Essential oils are volatile, highly concentrated extracts that amplify the plant’s toxic properties to a dangerous degree.
Dogs lack a specific liver enzyme needed to effectively metabolize and break down many essential oils. Ingesting even a few drops of lemongrass essential oil, or absorbing it through the skin, can lead to severe toxicity.
This comparison shows why the oil is vastly more dangerous than the fresh plant:
| Feature | Fresh Lemongrass Plant | Lemongrass Essential Oil |
| Concentration | Low natural concentration of oils. | 100% pure, highly concentrated extract. |
| Volume Required for Toxicity | Large quantities of stalks or leaves. | Just a few drops. |
| Primary Symptoms | Upset stomach, vomiting, diarrhea. | Liver damage, central nervous system depression, tremors. |
| Veterinary Urgency | Monitor closely; call vet if symptoms appear. | Immediate emergency veterinary intervention required. |
What to Do If Your Dog Ate Lemongrass
If you catch your dog eating this herb, stay calm and assess the situation. Panicking will only stress your pet, but acting quickly will help you manage any potential health fallout.
Do not attempt to induce vomiting at home using hydrogen peroxide or salt unless a veterinary professional explicitly instructs you to do so.
Follow this practical action plan based on the type of exposure:
| Type of Exposure | Recommended Action |
| A single bite of a leaf | Remove the plant. Monitor the dog for 24 hours for signs of stomach upset. |
| Multiple stalks or a large amount | Call your veterinarian or an animal poison control center for guidance. |
| Food cooked with lemongrass | Call the vet immediately. (These foods often contain highly toxic onions or garlic). |
| Essential oil ingestion/skin contact | Go to the nearest emergency veterinary clinic immediately. |
Why Dogs Try to Eat Lemongrass
Dogs are naturally curious omnivores, and many have a behavioral instinct to graze on grass. Because lemongrass grows in tall, grass-like clumps, dogs may mistake it for common lawn grass.
Some dogs graze when they have an upset stomach, while others simply enjoy the texture, the strong citrus scent, or the boredom-busting activity of shredding plants.
If your dog loves to graze, consider cultivating safer, dog-friendly plants in your garden instead:
| Plant Type | Safety Status for Dogs | Notes |
| Lemongrass | Unsafe | Causes GI upset; contains cyanogenic glycosides. |
| Common Lawn Grass | Generally Safe | Safe if untreated by pesticides, herbicides, or fertilizers. |
| Catnip / Cat Grass | Safe | Safe for dogs to nibble in moderation. |
| Spider Plant | Safe | Non-toxic, though eating too much can cause mild vomiting. |
| Aloe Vera | Unsafe | Contains saponins that cause vomiting, diarrhea, and lethargy. |
Keeping Your Dog Safe in the Garden
Environmental management is the most effective way to prevent accidental ingestion. If you want to grow this herb for your own culinary use, you must ensure your dog cannot access it.
Place potted lemongrass on sturdy, elevated plant stands out of your dog’s reach, or utilize heavy-duty garden fencing to block access to in-ground garden beds.
Always supervise your dog when they are in the yard, especially if they are a puppy or a known plant-chewer. If you use essential oils indoors, keep diffusers in rooms your dog cannot access, and never leave oil bottles on low tables.
Frequently Asked Questions
Can dogs eat food cooked with lemongrass?
No. Human foods prepared with this herb, such as Thai curries, soups, or marinades, are extremely dangerous for dogs. These dishes almost always contain heavy amounts of onions, garlic, excess fat, and high sodium, which are highly toxic and can cause life-threatening red blood cell damage or pancreatitis.
Will a small bite of lemongrass hurt my dog?
A single, small nibble of a leaf is unlikely to cause severe poisoning in a healthy adult dog. However, it may still cause a bout of mild nausea or a single episode of vomiting due to the fibrous texture and mild toxins.
Is the smell of lemongrass safe for dogs?
The natural scent of the growing plant is generally safe for dogs to sniff. However, diffusing concentrated lemongrass essential oil in a poorly ventilated room can irritate a dog’s sensitive respiratory tract, and oil droplets landing on their fur can be ingested when they groom themselves.
What to Remember About Lemongrass and Dogs
The most important takeaway is that dogs and lemongrass do not mix safely. While a tiny bite of a fresh leaf in the garden might only result in a minor stomach ache, the plant contains compounds that are toxic to canines, and the stalks pose a physical choking risk.
Always keep the plant fenced off in your yard, never share human food seasoned with it, and treat lemongrass essential oil as a household poison. If your dog ingests a large amount of the plant, or any amount of the essential oil, contact your veterinarian promptly for professional guidance.