Is Lemongrass Toxic to Cats and Dogs?
Yes, lemongrass is toxic to cats and dogs. According to the ASPCA, the entire plant, known scientifically as Cymbopogon citratus, contains compounds that can be harmful to pets if they ingest it.
While many cats and dogs are attracted to the grassy leaves, eating the plant can lead to uncomfortable side effects. The primary concern is gastrointestinal upset. The risk applies to both the fresh plant and dried forms used in cooking or teas. It is safest to keep lemongrass away from pets.
Lemongrass: what the ASPCA database lists
| ASPCA entry | Lemon Grass |
|---|---|
| Other common names | Oil Grass |
| Scientific name | Cymbopogon citratus |
| Family | Poaceae |
| Toxic to | Toxic to Dogs, Toxic to Cats, Toxic to Horses |
| Non-toxic to | None listed |
| Toxic principles | Essential oils, cyanogenic glycosides |
| Clinical signs listed | Dogs, cats: Stomach upset; Horses: difficulty breathing, weakness, death (rare) |
What the ASPCA lists for lemongrass toxicity
The American Society for the Prevention of Cruelty to Animals (ASPCA) lists lemongrass, also known as oil grass, as toxic to dogs, cats, and horses. The toxicity comes from its essential oils and cyanogenic glycosides. These compounds are found throughout the plant.
When a cat or dog chews on or eats lemongrass, these substances can irritate their digestive system. The most common clinical sign of lemongrass poisoning in cats and dogs is stomach upset. If a pet ingests a large amount of the plant, the effects could be more serious.
What this means in a home with pets
If you have pets, it is best to avoid growing lemongrass in your home or garden in areas they can access. Cats, in particular, may be drawn to nibbling on its long, grass-like leaves. Even a small amount can be enough to cause a negative reaction. Keep dried lemongrass, such as that used for culinary purposes, stored securely in sealed containers inside a pantry or cabinet that your pet cannot open.
The strong scent of lemongrass essential oil is also used in many household products like candles, diffusers, and cleaning sprays. The concentrated oils in these products can be more potent than the plant itself. Always read ingredient labels on household products and keep any items containing lemongrass essential oil out of your pet’s reach. Do not apply essential oils directly to a pet’s skin or fur.
Keeping your cats and dogs and this plant apart
Supervision is key to preventing a pet from eating something they should not. If you choose to keep lemongrass, make sure it is physically inaccessible to your animals. Placing it on a high shelf or in a separate room with a closed door can work for some pets, but determined cats may still find a way to reach it.
- For indoor plants, consider placing them in a room that your pets do not use.
- In a garden, you might use pet-safe fencing or netting to create a barrier around the plant.
- Always supervise your pets when they are outdoors in an area where lemongrass or other potentially toxic plants might be growing.
- Provide safe alternatives for your pet to chew on, such as appropriate pet toys or cat-safe grasses, to redirect their attention.
By taking these simple precautions, you can help ensure your pet does not ingest any part of the lemongrass plant.
When to call your vet
If your pet chewed or ate part of this plant, call your veterinarian or an animal poison control line. Note which plant and which part, how much may be gone and when, and take a photo or a piece of the plant with you.
If you suspect your pet has eaten any amount of lemongrass, call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 for guidance. A consultation fee may apply. Be prepared to tell the professional what part of the plant and how much your pet consumed, as well as the time of ingestion. Keep any packaging for reference. Do not try to induce vomiting or give any home remedies unless specifically instructed to do so by a veterinary professional.
Emergency signs: go now
- Collapse, fainting or severe weakness
- Seizures, tremors or trouble standing
- Trouble breathing or blue, gray or very pale gums
- Repeated vomiting or retching, or a swollen, painful belly
- Any known contact with a substance listed as toxic, even before signs appear
Book an appointment soon
- Vomiting or diarrhea that lasts or keeps coming back
- Not eating or drinking, or drinking much more than usual
- Drooling, pawing at the mouth or a swollen face
- Lethargy, hiding or acting unlike themselves
ASPCA Animal Poison Control Center: (888) 426-4435 (a consultation fee may apply). Your own vet or nearest emergency clinic is always a good first call.
Sources
Last checked October 21, 2026. Listings and guidance can change; your veterinarian knows your pet’s health history.