Are lilies poisonous to cats?

Updated 2026-07-16 · Not a substitute for professional veterinary care

Deadly, a true emergency

Short answer

Yes, and it is one of the most dangerous plant poisonings there is. True lilies (Lilium and Hemerocallis) can cause fatal kidney failure in cats. Every part is toxic, including the pollen and even the vase water. If your cat has touched a lily, call an emergency vet immediately. Minutes matter.

Why lilies are a life-threatening emergency for cats

True lilies are in a different class from most toxic plants. A cat that bites a leaf or petal, licks pollen off its fur, or drinks water from the vase can develop acute kidney failure within one to three days. Untreated, it is often fatal. There is no part of the plant that is safe.

The most dangerous are Lilium species (Easter, Asiatic, Tiger, Stargazer, Oriental) and Hemerocallis (daylilies). Because cats groom, even brushing past pollen is a real exposure.

Plants that carry the lily name but differ

Some plants called lilies are not true lilies and cause milder signs (mouth irritation) rather than kidney failure, for example peace lily, calla lily, and lily of the valley (which has its own heart risk). Do not rely on the name. If you are unsure which plant it is, treat it as an emergency and let the vet decide.

Signs of lily poisoning

Vomiting and drooling early on
Lethargy and hiding
Loss of appetite
Increased then decreased urination as the kidneys fail
Later, no urine at all

Signs can look like they improve after the first day, which is a false calm while the kidneys are being damaged.

What to do right now

Call an emergency vet immediately. Do not wait for signs. Treatment started within the first hours has by far the best outcome.
Bring the plant or a photo so the vet can confirm the species.
Remove all lilies from any home with a cat. Do not keep them as cut flowers either.

When in doubt, call a vet. This guide is general information for cat owners. It is not veterinary advice, and it is not a substitute for professional veterinary care, diagnosis, or treatment. If your cat is in distress, contact a veterinarian or your nearest emergency clinic straight away.

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Common questions

Can pollen alone poison a cat?

Yes. A cat can get a toxic dose simply by brushing against the flower and grooming the pollen from its fur. This is why lilies and cats cannot safely share a home.

My cat drank the flower water. Is that dangerous?

Yes, the vase water from true lilies is toxic. Call an emergency vet right away.

Which lilies are safe for cats?

No true lily is safe. Some look-alikes named lily are less dangerous, but because misidentification is easy and true lilies are deadly, the safe rule is to keep all lilies out of a cat's home.

Sources

This guide draws on the following veterinary references: