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The most dangerous plants for cats
These plants can cause organ failure or death. Any exposure is an emergency:
- Autumn Crocus: bone marrow suppression (days later), death.
- Azaleas: abnormal heart rhythm, tremors, seizures or coma.
- Foxglove: weakness and collapse, death.
- Lilies: increased or decreased urination (12-24 hours), dehydration and acute kidney failure (24-72 hours).
- Lily of the Valley: seizures, collapse and death.
- Oleander: tremors, death.
- Sago Palms: liver failure, seizures and death.
- Yew: very slow or irregular heartbeat, seizures.
Lilies are the number one plant danger for cats. True lilies (Easter, tiger, Asiatic, stargazer) and daylilies cause kidney failure from tiny exposures, including pollen and vase water. Peace lilies and calla lilies are different plants that cause mouth irritation instead.
Common houseplants toxic to cats
Many popular houseplants, including pothos, monstera, philodendron and peace lilies, contain calcium oxalate crystals. They cause immediate mouth pain, drooling and vomiting but rarely serious harm, because pets stop chewing quickly.
Safe plants for cats
Looking for something you can keep without worry? See our list of plants safe for cats, including spider plants, calatheas, Boston ferns, orchids and money trees.
How we rate toxicity
- Non-toxic Listed as non-toxic by the ASPCA. Large amounts may still cause mild stomach upset.
- Mildly toxic Usually causes mouth irritation, drooling, vomiting or diarrhea that resolves with supportive care.
- Toxic Can cause significant illness, especially in larger amounts or from bulbs and tubers. Call a vet.
- Highly toxic Can cause organ failure or death. Emergency care is needed after any exposure.
Looking for dogs? See plants toxic to dogs. For food, see can cats eat…?