Is Lemongrass Safe for Dogs? A Vet-Backed Safety Guide

If you've caught your dog snacking on a lemongrass plant in the garden or you're wondering whether that Thai-inspired broth seasoned with lemongrass is safe to share, you're not alone. The question is lemongrass safe for dogs comes up frequently, and the answer is more nuanced than a simple yes or no. The safety depends heavily on the form — fresh plant, dried herb, essential oil, or cooked dish — and the quantity your dog consumes.

In my years working with dog owners on nutrition questions, lemongrass falls into that tricky middle category: not acutely lethal like grapes or xylitol, but not a safe, go-to treat like blueberries either. Here's what you need to know to keep your dog safe.

Can Dogs Eat Lemongrass? Understanding the Toxicity

The ASPCA's toxic plant database classifies lemongrass as mildly to moderately toxic to dogs. The two primary compounds of concern are:

• Cyanogenic glycosides — plant compounds that can release trace amounts of cyanide when metabolized. In the quantities found in lemongrass, cyanide poisoning is extremely rare in dogs, but the compounds still contribute to GI irritation.
• Citral and geraniol (essential oils) — concentrated aromatic compounds that irritate the canine digestive tract and, in the case of essential oil, can cause liver damage, neurological symptoms, and respiratory distress.

The fibrous, tough nature of lemongrass stalks also presents a genuine intestinal blockage risk, particularly for small-breed dogs. A dog that swallows a large piece of raw lemongrass stalk may develop a partial or complete GI obstruction — a surgical emergency that can cost between $2,500 and $7,000 to treat.

How the Form Changes the Risk Level

Lemongrass Form	Risk Level	Key Concern
Fresh raw stalk/leaf	⚠️ Moderate	GI obstruction, vomiting, diarrhea
Dried lemongrass herb	⚠️ Moderate	Concentrated oils, GI upset
Lemongrass essential oil	🚫 HIGH — Do not use	Liver toxicity, neurological signs, respiratory distress
Cooked in broth (stalk removed)	✅ Low	Minimal residual oils if stalk is removed before serving
Finely minced tender inner core (cooked)	⚠️ Low-Moderate	Small amounts tolerated; large amounts cause upset

How Much Lemongrass Can I Give My Dog?

Because lemongrass is not a recommended food for dogs, there is no established "safe" serving size in veterinary nutrition literature. However, if you choose to offer a tiny amount of cooked, finely minced tender lemongrass as a flavoring, the following limits represent the maximum threshold before GI upset becomes likely:

Important: These are not recommended serving sizes — they are upper limits before adverse effects become likely. If your dog has never had lemongrass before, start with roughly half the amount listed and monitor for 24–48 hours for signs of digestive upset (vomiting, diarrhea, loss of appetite, lethargy).

Is Lemongrass Good for Dogs Nutritionally?

Lemongrass does contain several nutrients that are beneficial in human nutrition, but the amounts your dog would consume in a safe serving are nutritionally negligible. For reference, here's what 1 tablespoon (approximately 3 grams) of fresh lemongrass provides, based on USDA FoodData Central values:

The bottom line: The nutrient quantities in a dog-safe serving of lemongrass are too small to provide any meaningful health benefit. If you want to add folate, potassium, or fiber to your dog's diet, far safer and more nutrient-dense options include cooked sweet potato (high in fiber and potassium), spinach (folate-rich), or green beans. There is no nutritional reason to feed lemongrass to your dog, and the risk-to-reward ratio doesn't justify it.

How Should I Prepare Lemongrass for My Dog?

If you've decided to let your dog taste a dish that contains lemongrass — or you want to offer a tiny amount as a novelty — proper preparation is critical to reduce risk:

What Happens If My Dog Eats Too Much Lemongrass?

If your dog raids the garden and chews through several lemongrass stalks, or ingests a significant amount of dried lemongrass or essential oil, watch for these symptoms:

Symptom Severity Breakdown

Severity	Symptoms	Onset Timeline	Action
Mild	Drooling, mild vomiting (1–2 episodes), soft stool, decreased appetite	1–4 hours after ingestion	Monitor at home; offer fresh water; withhold food for 12 hours; call vet if symptoms persist beyond 24 hours
Moderate	Repeated vomiting, diarrhea, abdominal pain (hunched posture, whining when touched), lethargy	2–8 hours after ingestion	Contact your veterinarian for guidance — may need anti-nausea medication or fluids
Severe (Blockage or Essential Oil)	Inability to keep water down, no bowel movements, distended abdomen, tremors, difficulty breathing, collapse	4–24 hours (blockage); 30 min–2 hours (essential oil)	Emergency — go to nearest emergency vet immediately

Related Foods and Plants to Avoid

If you're concerned about lemongrass exposure, be aware of these related plants and products that carry similar or greater risks for dogs:

• Citronella (Cymbopogon nardus) — A close relative of lemongrass in the same genus. Citronella candles, sprays, and plants contain similar essential oils and are toxic to dogs if ingested.
• Lemongrass essential oil in diffusers — Even passive diffusion in the air can irritate a dog's respiratory tract, especially brachycephalic breeds (pugs, French bulldogs, Boston terriers) who already have compromised airways.
• Citrus fruits (lemons, limes) — While the flesh of oranges and tangerines is safe in small amounts, lemon and lime peels, seeds, and leaves contain psoralen and essential oils (limonene, linalool) that cause vomiting, diarrhea, and photosensitivity.
• Garlic and onion — Commonly paired with lemongrass in Southeast Asian cooking. Both are highly toxic to dogs, causing hemolytic anemia. Even small amounts (as little as 15–30 g/kg of onion) can damage red blood cells.
• Other aromatic herbs toxic to dogs — Pennyroyal, tea tree (melaleuca), wintergreen, and pine essential oils are all significantly more dangerous than lemongrass and should never be used around dogs.

Which Dogs Should Never Eat Lemongrass?

Even the small amounts described above should be avoided entirely for these categories of dogs:

• Puppies under 12 months — Their digestive systems are still developing, and their lower body weight makes them more susceptible to toxic effects. A piece that causes mild upset in a 60 lb Labrador could cause significant distress in a 5 lb Chihuahua puppy.
• Senior dogs (over 8–10 years, breed-dependent) — Older dogs often have decreased liver and kidney function, reducing their ability to metabolize and excrete the compounds in lemongrass.
• Dogs with liver disease — Hepatic compromise means the liver cannot efficiently process citral and geraniol, increasing the risk of further damage.
• Dogs with a history of GI obstruction or pica — If your dog has a tendency to swallow non-food items or has had a previous blockage, the fibrous stalk material is a serious risk.
• Dogs with known plant allergies or sensitive stomachs — Dogs with inflammatory bowel disease (IBD), food sensitivities, or chronic pancreatitis should not be introduced to novel, potentially irritating plant material.
• Brachycephalic breeds — Already prone to respiratory issues, these dogs are more vulnerable to the airway-irritating effects of lemongrass's volatile oils.

As always, consult your veterinarian before introducing any new food or herb to your dog's diet, especially if your dog has existing health conditions or is on medication. Your vet can assess your individual dog's risk profile and advise accordingly.

Frequently Asked Questions