Which part of the lily is poisonous to cats?

All of it. Petals, leaves, stamen and pollen are all toxic, and so is the water in the vase. A cat can be poisoned by eating a small piece of leaf or petal, by licking a few grains of pollen off its fur while grooming, or by drinking vase water.

How quickly do symptoms appear after a cat eats a lily?

Signs begin within one to three hours: drooling, loss of appetite, lethargy and vomiting. Over the following 12 to 30 hours the cat develops increased urination, dehydration and continued vomiting. If untreated, weakness and collapse follow, with death within three to seven days.

My cat brushed against lily pollen — is that dangerous?

Yes, treat it as an exposure. Cats groom, so pollen on the coat ends up swallowed. Licking a few grains off the fur has been enough to cause fatal kidney failure. Do not wait for symptoms — call a vet or an animal poison control line straight away.

Are Lilies Toxic to Cats? Which Ones Kill and Which Don't

Q: Are lilies toxic to cats?

True lilies — those in the Lilium and Hemerocallis families, including Easter, tiger, day, Asiatic and stargazer lilies — cause acute kidney failure in cats and can be fatal within three days. Plants with 'lily' in the name that are not true lilies, such as peace lily and calla lily, are a different problem: they contain oxalate crystals that cause mouth irritation and vomiting but do not cause kidney failure.

Q: Are lilies dangerous to dogs too?

The kidney toxicity of true lilies is a cat problem. Dogs that eat lilies typically get gastrointestinal upset rather than kidney failure. That difference is why advice written for dogs is not safe to apply to cats.

The word “lily” is attached to a lot of unrelated plants, and the difference between them is the difference between an upset stomach and a dead cat. So the useful question is not whether lilies are toxic, but which lily is in your house.

The Ones That Cause Kidney Failure

True lilies — the genera Lilium and Hemerocallis — damage the cells lining the kidney tubules and cause acute kidney failure in cats. The mechanism is still not understood, but the effect is well documented and it is specific to cats.

True lilies — all highly dangerous to cats

Easter lilyTiger lilyDay lilyAsiatic lilyStargazer lilyRubrum lilyJapanese show lilyWood lily

These turn up constantly in supermarket bouquets and gift arrangements, frequently without a label, which is how most exposures happen. Florists do not warn about it and cat owners rarely think to ask.

The Ones Named “Lily” That Are Not

Several popular houseplants carry the name without being true lilies. They are not harmless, but they do not cause kidney failure — they contain oxalate crystals that irritate the mouth and throat.

Peace lily	Oral irritation, drooling, vomiting — not kidney failure
Calla lily	Oral irritation, drooling, vomiting — not kidney failure
Peruvian lily	Mild stomach upset

A cat that has chewed a peace lily and is drooling and pawing at its mouth needs a vet call, not a panic. A cat that has brushed past an Easter lily needs a vet now. Same word, entirely different situation — which is exactly why identifying the plant is the first thing to do.

How Little It Takes

This is the part that catches people out. The whole plant is toxic — petals, leaves, stamen and pollen — and so is the water in the vase.

Eating a small piece of leaf or petal can be enough. So can licking a few grains of pollen off the fur while grooming, which means a cat that merely walked past an arrangement and brushed the stamens has had an exposure. Drinking vase water counts too. There is no safe way to have true lilies in a house with a cat, including keeping them on a high shelf, because pollen falls.

The Timeline, and Why It Deceives

Signs follow a recognisable sequence:

1–3 hours: drooling, loss of appetite, lethargy, vomiting.
12–30 hours: increased urination, dehydration, continued vomiting and lethargy.
3–7 days: weakness, collapse and death if untreated.

The danger in that sequence is the gap. Early vomiting can settle, and a cat that seems brighter a few hours later looks like a cat that has recovered from something it ate. It has not — the kidney damage is progressing quietly, and by the time the later signs arrive the window for straightforward treatment has largely closed. Apparent improvement after a lily exposure is not reassurance.

What Happens at the Vet

Treatment centres on decontamination if the exposure was recent and aggressive intravenous fluids to protect the kidneys, with bloodwork to track creatinine and urea over the following days. Our page on acute kidney injury in cats covers the diagnosis and treatment side in full, including what the values mean as they change.

What About Dogs?

The kidney toxicity is a cat problem. Dogs that eat true lilies generally get gastrointestinal upset rather than kidney failure. It is worth knowing because general pet advice often blurs the two, and a dog owner's reassuring experience with lilies tells a cat owner nothing useful.

Kidney bloodwork after an exposure?

Upload your cat's results and see creatinine, urea and SDMA explained in plain English, including how to read them across repeat samples while the kidneys recover.

Check My Cat's Results

Frequently Asked Questions