Are lilies poisonous to cats?
Yes. Some lilies are among the most dangerous plants a cat can meet. True lilies (the genus Lilium, such as Easter, Stargazer, Asiatic and tiger lilies) and daylilies (Hemerocallis) can cause fatal kidney failure in cats. A small bite of a leaf or petal, pollen licked off the fur, or a drink of vase water can be enough. If your cat may have had any contact, call a vet or animal poison control immediately; do not wait for symptoms.
If it has just happened
- Call your vet or an emergency vet now. Early treatment greatly improves the outlook; the FDA says that if treatment is delayed by 18 hours or more, the cat will generally have irreversible kidney failure.
- Take the plant, or a photo of it, with you so the vet can tell which type of lily it is. Make sure the cat cannot reach it again.
- If there is pollen on the fur, stop the cat grooming it off if you safely can, and tell the vet.
- Do not try home remedies or wait to see if the cat seems ill. Cats can look normal in the early hours.
Which lilies are dangerous to cats?
The kidney damaging lilies belong to two groups:
- True lilies (Lilium): including Easter lily, Stargazer lily, Asiatic lilies, tiger lily and many hybrids used in bouquets. UC Davis notes that Easter, Stargazer and Asiatic lilies seem to be the most hazardous, but treat every Lilium as dangerous.
- Daylilies (Hemerocallis): common garden plants that also cause kidney failure in cats.
Some plants called "lilies" are not true lilies but are still harmful in other ways:
| Plant | Risk to cats |
|---|---|
| Easter, Stargazer, Asiatic, tiger and other true lilies | Kidney failure; can be fatal |
| Daylilies | Kidney failure; can be fatal |
| Lily of the valley | Not a true lily, but affects the heart: irregular heartbeat and low blood pressure (UC Davis) |
| Peace lily, calla lily | Do not cause kidney failure, but can irritate the mouth and stomach (UC Davis) |
Because it is easy to misidentify plants, and florists' bouquets often include lilies, the safest rule for any home with cats is simple: no lilies indoors, and none in the garden if your cat goes outside. Cornell's advice is the same: keep these plants away from cats entirely.
How much lily is toxic?
Very little. According to the FDA, every part of the plant is toxic: stem, leaves, flowers, pollen and even the water in the vase. Eating a small piece of a leaf or petal, licking a few pollen grains off the fur while grooming, or drinking vase water can lead to fatal kidney failure in under three days. The toxin itself has still not been identified, and it only affects cats; dogs that eat lilies may get an upset stomach but do not develop kidney failure.
Symptoms of lily poisoning in cats
The FDA describes a typical timeline:
| Time after exposure | What you may see |
|---|---|
| 0 to 12 hours | Less active, drooling, vomiting, loss of appetite |
| 12 to 24 hours | Signs of kidney damage: peeing more, dehydration |
| 24 to 72 hours | Kidney failure, which is fatal without treatment |
Early signs can fade, which can falsely reassure owners. That is why any suspected exposure should go straight to a vet, with or without symptoms.
How vets treat it
Treatment aims to stop absorption and protect the kidneys before damage sets in. It typically involves making the cat vomit if exposure was very recent, giving activated charcoal, and intravenous fluids for a couple of days with blood tests to monitor kidney values. The key point from every source is the same: the sooner treatment starts, the better the outlook.
Lilies and the holidays
Lilies are popular in Easter displays, Mother's Day and sympathy bouquets, which is why Cornell runs seasonal reminders about them. If you receive a bouquet, check it for lilies before bringing it in, and tell friends and family that you have cats. Many florists will make lily free arrangements on request.
Lily FAQ
Are all lilies poisonous to cats?
True lilies (Lilium) and daylilies (Hemerocallis) cause kidney failure in cats. Peace lilies and calla lilies are not true lilies and do not cause kidney failure, but can irritate the mouth and stomach. Lily of the valley affects the heart. The safest approach is to keep all of them away from cats.
Can lily pollen kill a cat?
Yes. The FDA says licking a few pollen grains off the fur while grooming can cause fatal kidney failure.
Is lily vase water dangerous to cats?
Yes. Water from a vase holding lilies can poison a cat, according to the FDA and UC Davis.
How long after eating a lily will a cat show symptoms?
Early signs such as vomiting, drooling, low energy and not eating usually start within 0 to 12 hours; kidney damage follows at 12 to 24 hours and kidney failure within 24 to 72 hours. Go to a vet immediately rather than waiting for signs.
Sources
- US FDA: Lovely Lilies and Curious Cats: A Dangerous Combination
- UC Davis School of Veterinary Medicine: Lily Toxicity in Cats
- Cornell Feline Health Center: Easter Peril: Look Out for Lilies and Other Items
- Cornell Feline Health Center: Common Cat Hazards
- ASPCA: Lily (toxic and non toxic plants)
- Pet Poison Helpline: Lilies
General education, not veterinary advice. If you are worried about your cat, contact your veterinarian; in an emergency, go to the nearest emergency vet.