Yes, lilies are extremely poisonous to cats. True lilies (Lilium species) and day lilies (Hemerocallis species) can cause severe kidney failure in cats, which can be fatal. Even small amounts of any part of the plant—including petals, leaves, pollen, or even the water in a vase—can lead to sudden and irreversible kidney damage. Some of the most toxic lilies to cats include Asiatic lily, Easter lily, Stargazer lily, Tiger lily, and Oriental lily. Other plants with "lily" in their name, like peace lilies and calla lilies, are less toxic but can still cause irritation and vomiting. Immediate veterinary attention is crucial if a cat is suspected to have ingested any part of a lily.
