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Is Sego Lily toxic to cats?

NO (NON-TOXIC)
Good news, Sego Lily is a cat safe plant! While this plant is non-toxic, it may still irritate your cat's tummy and potentially cause vomitting or diarrhea if ingested.
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Additional Names:Mariposa Lily
Scientific Name:Calochortus gunnisonii
Family:Liliaceae
Detailed Write-up
Author:
Alec
Last Updated:
7/13/25

Is Sego Lily Toxic to Cats?

Cats are one of the most beloved pets globally, and their owners always want to make sure they are safe and healthy. As a result, when people are planning their garden or landscaping, they frequently ask whether a particular plant or flower is dangerous to their cats. One such plant that is frequently asked about is the Sego Lily.

What is Sego Lily?

Sego Lily, botanically known as Calochortus Nuttallii, is a flowering plant native to North America, specifically the Western United States. The Sego Lily, also colloquially called Mariposa Lily, is a member of the Liliaceae family, which includes lilies, onions, garlic, and other plants.

The Sego Lily is a gorgeous plant with delicate purple and white flowers that bloom between May and June. The plant thrives in arid regions, such as Utah and Idaho.

Is Sego Lily Toxic to Cats?

The answer is yes. The Sego Lily is toxic to cats, making cat owners wonder if they should avoid planting or having this plant in their garden or landscaping.

When cats ingest any part of the Sego Lily, it can cause kidney damage and failure. The toxic substance in the Sego Lily is cyclopamine, a naturally occurring compound in the plant. Cyclopamine is a potent molecule that is useful in cancer research and drug discovery. However, it can be lethal to cats if ingested.

Ingestion of Sego Lily causes cats to experience digestive discomfort, nausea, vomiting, and trembling. If left untreated, these symptoms gradually worsen and eventually lead to kidney failure and death. As a result, it is critical to watch out for any unusual behavior in cats, particularly if they've been exposed to the plant.

What Should You Do if Your Cat Ingests Sego Lily?

If your cat has ingested even a small amount of Sego Lily, it is crucial to take them to the vet right away. The veterinarian will perform immediate treatment to help alleviate vomiting symptoms in the cat while also making sure that the kidneys are functioning properly. If needed, they will provide the cat with a specific medication that helps to flush cyclopamine out of the cat's system.

What Are the Safe Alternatives to Sego Lily?

There are many plants and flowers that are safe for cats, and it is essential to choose these plants when designing a cat-friendly garden or landscape. Some of the alternatives to Sego Lily include:

  • Spider Plant
  • African Violet
  • Petunia
  • Boston Fern
  • Lily (Peace Lily, Calla Lily, Asiatic Lily)

These plants are safe and non-toxic to cats and can make for an excellent addition to your garden or home.

Conclusion

The Sego Lily, while a beautiful plant, is toxic to cats, and owners should avoid planting or keeping it in their gardens or landscaping. Cyclopamine, the plant's toxic substance, causes kidney damage and failure in Cats. If your cat ingests even a small amount of the Sego Lily, it is critical to take them to the vet immediately. Fortunately, there are many cat-safe alternatives that you can choose from when designing your garden or landscape. By selecting these, you can ensure that your cat remains healthy and safe.

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