Are Peace Lilies Poisonous? Key Facts & Safety Tips

By Michael Chen · January 23, 2026

Are Peace Lilies Poisonous? Yes, They Are Toxic to Pets and Humans

Peace lilies (Spathiphyllum spp.) are popular indoor plants prized for their glossy foliage and elegant white blooms. However, yes, peace lilies are poisonous. They contain calcium oxalate crystals, which can cause severe irritation and swelling of the mouth, throat, and digestive tract if ingested by humans or pets. While not usually fatal, exposure can lead to significant discomfort and requires prompt attention.

Why Are Peace Lilies Considered Poisonous?

The toxicity of peace lilies stems from microscopic needle-shaped crystals called calcium oxalate raphides found in all parts of the plant, especially the leaves and stems. When chewed or bitten, these crystals penetrate soft tissues, causing immediate pain and inflammation.

Symptoms of Peace Lily Poisoning

Intense burning sensation in the mouth and tongue
Swelling of lips, tongue, and throat
Excessive drooling
Difficulty swallowing
Nausea, vomiting, or diarrhea
In pets: pawing at the mouth, vocalization due to pain

Is a Peace Lily Dangerous for Cats and Dogs?

Yes, peace lilies pose a serious risk to household pets. Cats and dogs are particularly vulnerable because they may chew on the attractive leaves. The ASPCA lists peace lilies as toxic to both cats and dogs due to their calcium oxalate content.

Species	Toxicity Level	Common Symptoms	Onset Time	Treatment Needed?
Cats	Moderate to Severe	Drooling, vomiting, oral irritation	Minutes	Yes, veterinary care recommended
Dogs	Moderate	Drooling, pawing at mouth, nausea	5–30 minutes	Yes, monitor closely; vet if severe
Humans (Adults)	Mild to Moderate	Oral irritation, difficulty swallowing	Immediate	Rinse mouth; seek medical advice if swelling occurs
Children	Moderate	Pain, vomiting, throat swelling	Immediate	Seek immediate medical help

Table data source:1, 2

The data shows that while symptoms appear rapidly across species, the severity varies. Pets, especially cats, require urgent veterinary evaluation. In children, even small ingestions can lead to airway compromise due to throat swelling.

How to Safely Grow Peace Lilies Indoors

Despite their toxicity, peace lilies remain excellent houseplants when managed responsibly. Follow these best practices to enjoy their beauty without risk:

Safe Placement Tips

Place on high shelves or hanging planters out of reach of pets and toddlers
Avoid placing near pet beds or play areas
Use physical barriers like plant stands with enclosures

Handling and Maintenance Precautions

Wear gloves when pruning or repotting to avoid skin irritation
Wash hands thoroughly after contact
Dispose of cuttings securely where pets cannot access them

What to Do If Poisoning Is Suspected

If you suspect ingestion of peace lily by a person or pet, act quickly:

Rinse the mouth gently with water to remove plant particles
Do not induce vomiting unless directed by a professional
For humans: Call Poison Control (1-800-222-1222) or seek medical help
For pets: Contact your veterinarian or the ASPCA Animal Poison Control Center (888-426-4435)

Early intervention typically leads to full recovery within 12–24 hours with supportive care.

Frequently Asked Questions About Peace Lily Toxicity

Are peace lilies poisonous to cats?

Yes, peace lilies are toxic to cats. Chewing on the leaves releases calcium oxalate crystals that cause intense oral pain, drooling, and vomiting. Immediate veterinary consultation is advised if ingestion occurs.

Can peace lilies harm dogs?

Yes, peace lilies are harmful to dogs. While rarely life-threatening, they can cause significant mouth irritation, nausea, and reluctance to eat. Monitor your dog closely and consult a vet if symptoms persist beyond a few hours.

Is it safe to have a peace lily with babies at home?

Caution is required. Peace lilies are toxic if ingested by infants or toddlers. Keep the plant well out of reach, ideally in rooms inaccessible to young children, and supervise closely during visits to such spaces.

Do peace lilies release toxins into the air?

No, peace lilies do not release airborne toxins. The danger comes only from direct contact or ingestion of plant material. Their air-purifying qualities make them beneficial for indoor air quality when safely placed.

Are there non-toxic alternatives to peace lilies?

Yes, consider non-toxic options like moth orchids (Phalaenopsis), cast iron plant (Aspidistra elatior), or parlor palm (Chamaedorea elegans). These offer similar aesthetics without posing poisoning risks to pets or children.