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Is Philodendron Pertusum toxic to cats?

YES (TOXIC)
Unfortunately, Philodendron Pertusum is toxic and potentially harmful to cats. We recommend you keep your feline friends away from this plant. See the table below for more information.
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Scientific Name:Philodendron spp
Family:Araceae
Toxic Principles:Insoluble calcium oxalates
Clinical Signs:Oral irritation, pain and swelling of mouth, tongue and lips, excessive drooling, vomiting (not horses), difficulty swallowing
If you think your cat may have ingested a poisonous substance, call 888 426 4435 or your local vet
Detailed Write-up
Author:
Alec
Last Updated:
7/13/25

Is Philodendron Pertusum Toxic to Cats?

Potentially hazardous houseplants are a growing concern for cat owners. The internet is rife with articles and forums debating whether one plant or another is toxic to our feline friends. One such plant that often comes up is Philodendron Pertusum, commonly known as split-leaf philodendron or Swiss cheese plant. Let's look at what we know about this plant and its effects on cats.

What Is Philodendron Pertusum?

Philodendron Pertusum is an ornamental plant native to the rainforests of South America. It belongs to the Araceae family, which also includes other popular houseplants such as peace lilies, pothos, and ZZ plants. The distinguishing feature of Philodendron Pertusum is its large, heart-shaped leaves that are deeply incised, giving it a distinctive, Swiss cheese-like appearance.

Why Do Cats Chew on Plants?

Cats are natural explorers and often curious about their environment. They are also nibblers and tend to chew on things they encounter, including plants. This instinctual behavior isn't always harmful, but it can become dangerous if the plant is toxic.

Is Philodendron Pertusum Toxic to Cats?

The short answer is yes; Philodendron Pertusum is toxic to cats. It contains insoluble calcium oxalate crystals that can cause severe irritation and swelling if ingested. These crystals can cause immediate symptoms such as drooling, foaming at the mouth, vomiting, and difficulty swallowing. In severe cases, the swelling can be so severe that it can cause airway blockage, leading to respiratory distress and even death.

What Are the Symptoms of Philodendron Pertusum Poisoning in Cats?

The symptoms of Philodendron Pertusum poisoning in cats can vary and depend on the severity of the exposure. Mild cases can cause irritation of the mouth and tongue, while more severe cases can result in swelling of the airways, making it difficult for the cat to breathe. Symptoms to watch for include:

  • Drooling and foaming at the mouth
  • Vomiting and diarrhea
  • Redness, irritation, and swelling of the mouth and tongue
  • Difficulty swallowing
  • Swelling of the airways, making it difficult to breathe
  • Decreased appetite and lethargy

If you suspect your cat has ingested Philodendron Pertusum or displays any of these symptoms, contact your veterinarian right away.

How to Prevent Philodendron Pertusum Poisoning in Cats?

The best way to prevent Philodendron Pertusum poisoning in cats is to keep the plant out of their reach. Cats are incredibly agile and can climb or jump to access plants placed on high shelves or hanging baskets. It's best to place plants in areas that are inaccessible to cats or to use a deterrent spray or mesh to make them less appealing. If you have a cat that is particularly curious or determined, it's best to avoid having Philodendron Pertusum altogether.

Conclusion

In conclusion, Philodendron Pertusum, also known as split-leaf philodendron or Swiss cheese plant, is toxic to cats. It contains insoluble calcium oxalate crystals that can cause severe irritation and swelling if ingested. It's important to keep this plant out of your cat's reach and to watch for symptoms such as drooling, vomiting, and difficulty breathing if you suspect exposure. If you have any doubts or concerns about your cat's health, always consult your veterinarian.

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