Is Calla Lily Toxic to Cats?
Short answer: yes, but not the way you might fear. Calla lily (Zantedeschia aethiopica) is toxic to cats — but despite the name, it isn't a true lily, and it doesn't cause the deadly kidney failure that true lilies do. Its toxin is insoluble calcium oxalate, the same mouth-burning mechanism as monstera and pothos. Getting this distinction right matters a lot for how worried to be.
Quick verdict
Toxic? Yes — to cats and dogs (ASPCA-listed), but a different, milder category than true lilies.
How bad? Usually mild to moderate — mouth pain, not organ failure.
Toxic part & why: the whole plant contains insoluble calcium oxalate crystals (raphides).
Calla lily is not a true lily — here's why that matters
This is the single most important fact about calla lily toxicity. Despite the common name, calla lily belongs to the Araceae family (the arum family, alongside peace lily, philodendron, and monstera) — not the genus Lilium, which contains the true lilies that cause fatal kidney failure in cats.
| Calla lily | True lily (Lilium/Hemerocallis) | |
|---|---|---|
| Family | Araceae (arum family) | Liliaceae |
| Toxin | Insoluble calcium oxalate | Unidentified nephrotoxin |
| Main effect | Mouth & throat pain | Acute kidney failure |
| Severity | Mild to moderate | Often fatal without fast treatment |
If you're unsure which one you have, don't guess — the difference between "uncomfortable" and "emergency" is significant. A quick photo through Nature Lenz will confirm the exact species.
Symptoms of calla lily exposure
- Intense oral burning — pawing at the mouth, drooling
- Vomiting and reduced appetite
- Difficulty swallowing
- Swelling of the lips, tongue, or mouth — rare but the true emergency sign for this plant
What to do if your pet ate calla lily
- Rinse their mouth gently with water.
- Offer something cold — milk or cold water eases the burning.
- Call your vet or ASPCA Poison Control at (888) 426-4435 if drooling is heavy, the mouth swells, or vomiting continues.
- Do not induce vomiting unless a vet tells you to.
- Go in immediately for any sign of breathing trouble.
Calla lily, or an actual true lily?
The name overlap causes real confusion in exactly the moment it matters most. Snap a photo and Nature Lenz identifies the exact species and flags toxicity level instantly — free, no paywall.
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The bottom line
Calla lily deserves respect but not panic. It's genuinely toxic and can cause real mouth pain, but it belongs in the same risk category as monstera and pothos — not the same category as true lilies, which are a medical emergency. Know the difference before you decide how urgently to react.
FAQs
Is calla lily as dangerous as a true lily?
No. Calla lily (Zantedeschia) belongs to the Araceae family, not the true lily genus Lilium. It causes painful mouth and throat irritation from calcium oxalate crystals, but it does not cause the acute kidney failure that true lilies do.
Why is calla lily called a "lily" if it's not related to true lilies?
It's a common naming quirk — many unrelated plants share the word "lily" because of similar flower shapes, not botanical relation. Calla lily, peace lily, and lily of the valley are all commonly called lilies but belong to entirely different plant families with different toxins.
Can calla lily kill a cat?
It's very unlikely. The main risk is intense oral pain that usually stops a cat from eating much. The rare serious complication is swelling severe enough to affect breathing, which needs emergency care, not death from organ failure.
What should I do if my cat chewed a calla lily?
Rinse their mouth with water, offer a little milk or cold water to ease the burning, and monitor for a few hours. Call your vet or ASPCA Poison Control at (888) 426-4435 if drooling is heavy, the mouth swells, or vomiting continues.
Are calla lily flowers more dangerous than the leaves?
The calcium oxalate crystals are distributed throughout the plant — leaves, stems, and flowers all carry some risk. There's no part of the plant that's meaningfully safer to chew than another.