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Is philodendron toxic to cats?

Also called: heartleaf philodendron, philodendrons, Cordatum, Sweetheart Plant, Philodendron hederaceum

Toxic

Its crystals irritate the mouth and stomach, causing drooling and vomiting.

Yes. Philodendrons are toxic to cats. They contain crystals that cause mouth pain and swelling, heavy drooling and vomiting.

Signs to watch for

  • Mouth irritation, pain and swelling of the mouth, tongue and lips, heavy drooling, vomiting and difficulty swallowing.

Sources

  • Toxic and Non-toxic Plants: Heartleaf PhilodendronASPCA Animal Poison Control · Read 9 October 2026
    Toxicity: Toxic to Dogs, Toxic to Cats, Toxic to Horses
    Clinical Signs: Oral irritation, pain and swelling of mouth, tongue and lips, excessive drooling, vomiting (not horses), difficulty swallowing
  • Top 10 toxic household plants for petsVCA Animal Hospitals · Read 9 October 2026
    If ingested, this plant can cause burns to the mouth, excessive drooling and vomiting.
  • Top 11 Poisonous PlantsPet Poison Helpline · Read 9 October 2026
    These plants contain insoluble calcium oxalate crystals that can be very irritating to the mouth and gastrointestinal tract.
  • Household Items Toxic To KittensVCA Animal Hospitals · Read 9 October 2026
    Other poisonous plants include sago palm, philodendron, English ivy, cyclamen, pothos and chrysanthemum.
  • Cats and poisonsInternational Cat Care · Read 9 October 2026
    If you’re concerned your cat has come into contact with any of the substances listed, contact your veterinary team immediately

Information from ASPCA Animal Poison Control, VCA Animal Hospitals, Pet Poison Helpline and International Cat CareSources checked 9 October 2026

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