Are Philodendrons Poisonous? What You Must Know

By Sophia Martinez · January 23, 2026

Are Philodendrons Poisonous? Yes, They Are Toxic to Humans and Pets

Philodendrons are popular houseplants known for their lush foliage and easy care, but yes, philodendrons are poisonous. These plants contain calcium oxalate crystals, which can cause severe irritation and swelling in the mouth, throat, and digestive tract if ingested by humans or pets. Symptoms include drooling, vomiting, difficulty swallowing, and oral pain. Immediate medical attention is advised if ingestion occurs.

Why Are Philodendrons Poisonous?

The toxicity of philodendrons comes from microscopic needle-shaped crystals called calcium oxalate raphides, found throughout the plant—especially in the leaves and stems. When chewed or swallowed, these crystals penetrate soft tissues, causing intense burning and inflammation.

Symptoms of Philodendron Poisoning

Burning sensation in the mouth, lips, and tongue
Excessive drooling
Swelling of the mouth and throat
Difficulty swallowing
Nausea and vomiting
Hoarseness or trouble speaking (in severe cases)

Philodendron Toxicity in Pets

Dogs, cats, and other household pets are highly susceptible to philodendron poisoning. Curious animals often chew on accessible plant parts, leading to immediate discomfort and potentially dangerous reactions.

Common Signs in Pets Include:

Pawing at the mouth
Vomiting
Refusal to eat
Depression or lethargy
Labored breathing (rare, in extreme swelling)

Species	Toxic Part	Human Risk Level	Pet Risk Level (Cats/Dogs)	Common Symptoms
Philodendron cordatum	Leaves, stems	Moderate	High	Oral irritation, vomiting
Philodendron bipinnatifidum	Foliage, sap	High	High	Swelling, drooling, dysphagia
Philodendron selloum	All parts	Moderate	High	Mucosal irritation, GI upset
Philodendron gloriosum	Leaves, petioles	Moderate	High	Oral pain, nausea
Philodendron erubescens	Stems, new growth	Moderate	High	Drooling, vomiting

Table data source:1, 2

The table above shows that all common philodendron species pose a high risk to pets and moderate to high risk to humans. While fatalities are rare, the severity of symptoms warrants caution, especially in homes with children or curious animals. Immediate decontamination and veterinary or medical care are critical after exposure.

Safe Handling and Prevention Tips

Despite their toxicity, philodendrons can be safely enjoyed with proper precautions. Here’s how to minimize risks:

For Households with Children:

Place plants out of reach, such as on high shelves or hanging planters
Educate children not to touch or taste houseplants
Wear gloves when pruning to avoid skin irritation from sap
Wash hands thoroughly after handling any part of the plant

For Pet Owners:

Avoid placing philodendrons in areas accessible to pets
Use bitter-tasting deterrent sprays on leaves
Consider non-toxic alternatives like Calathea or Peperomia
Monitor pets closely after introducing new houseplants

What to Do If Poisoning Is Suspected

If you suspect someone has ingested philodendron material, act quickly:

Rinse the mouth gently with water to remove plant particles
Do not induce vomiting unless directed by a medical professional
Contact Poison Control (1-800-222-1222 in the U.S.) or seek emergency care
For pets, call your veterinarian or the ASPCA Animal Poison Control Center (888-426-4435)

Most cases are mild and resolve within 12–24 hours with supportive care, but prompt response reduces complications.

Frequently Asked Questions About Philodendron Toxicity

Are philodendrons poisonous to dogs?

Yes, philodendrons are highly toxic to dogs. Ingestion causes oral irritation, excessive drooling, vomiting, and difficulty swallowing. Seek veterinary help immediately if your dog chews on a philodendron.

Can philodendron cause skin irritation?

Yes, the sap of philodendrons contains calcium oxalate crystals that can cause skin irritation, redness, and dermatitis in sensitive individuals. Always wear gloves when pruning or repotting.

Are there non-toxic houseplants similar to philodendrons?

Yes, several non-toxic plants resemble philodendrons, including Calathea orbifolia, Maranta leuconeura (prayer plant), and certain ferns like Boston fern. These are safer choices for homes with pets or small children.

Is philodendron poisoning life-threatening?

In most cases, philodendron poisoning is not fatal but can cause significant discomfort. Severe swelling of the airway is rare but possible, especially in small children or pets, requiring urgent medical attention.

Can you have philodendrons with cats?

You can, but only if the plant is completely inaccessible. Cats are agile and curious, making them prone to chewing on leaves. For safety, choose cat-safe alternatives like spider plants or Areca palms.