Are ZZ plants toxic to cats?
Yes. ZZ plants (Zamioculcas zamiifolia) contain calcium oxalate crystals that cause mouth irritation and GI upset.
If your cat has just eaten zz plants
- Rinse mouth with cool water if tolerated.
- Monitor for drooling, vomiting, and swelling.
- If you can't reach a vet, call ASPCA Animal Poison Control on (888) 426-4435 ($95 consult fee) or Pet Poison Helpline on (855) 764-7661.
- Call your vet if symptoms are significant.
What's the full picture?
ZZ plants are popular low-maintenance houseplants. Like pothos and philodendron, they contain insoluble calcium oxalate crystals.
ZZ plants have a myth attached that they're 'highly poisonous' — in reality their toxicity is comparable to pothos. Still unpleasant for a cat; still worth a vet call.
What calcium oxalate crystals actually do
These microscopic, needle-shaped crystals are the plant's own defense mechanism, released when a leaf is chewed or damaged. In a cat's mouth they cause immediate irritation — drooling, pawing at the mouth, and swelling of the lips or tongue — which is usually unpleasant enough that most cats stop chewing after one bite rather than eating a dangerous amount. This is a very different mechanism from a systemic toxin like the compounds in true lilies, which is why the reaction, while distressing, is rarely life-threatening on its own.
Reducing the risk without giving up the plant
ZZ plants are popular precisely because they tolerate neglect and low light — if you want to keep one in a cat household, placing it somewhere genuinely inaccessible (a high shelf, a room the cat doesn't enter) is more reliable than hoping your cat won't be curious. If your cat is a persistent plant-chewer, it may be simpler to swap it for a confirmed cat-safe houseplant instead.
Symptoms to watch for
Emergency vet treatment for poisoning typically costs $800–$3,000 in the US. Pet insurance covers it — and you can get a quote in under 2 minutes.
As an Amazon Associate and CJ Affiliate we earn from qualifying purchases. Links below are affiliate links.
Cat Owner Essentials
If you love the look but not the risk, pet-safe artificial plants are indistinguishable on a shelf and completely nibble-proof.
Recommended for Cat Households
Related
About this guidance
Every entry on this site is compiled from published US veterinary toxicology sources — AAFP, ASPCA Animal Poison Control Center (ASPCA APCC) references, AVMA-registered practice materials, and peer-reviewed feline medicine literature. Where the evidence is mixed, we err on the cautious side because cats are unusually sensitive to many common substances that are harmless to humans and even to dogs.
This is general information written for US cat owners. It is not personalised veterinary advice for your specific cat, their age, weight, medical history, or the exact exposure you're dealing with. If your cat has eaten something or is unwell, call your vet first. The ASPCA Poison Control on (888) 426-4435 is available 24/7 for a small fee and can tell you whether an emergency visit is needed.
Entries are reviewed and updated as new research emerges. Spotted an error? Let us know — corrections are investigated and applied within 24 hours. For more context on how we work, see about and our full disclaimer.
Last reviewed: · By the Cat Ate It editorial team
Questions owners ask
Are ZZ plants toxic to cats?
Yes. ZZ plants (Zamioculcas zamiifolia) contain calcium oxalate crystals that cause mouth irritation and GI upset.
If your cat has just eaten zz plants
Rinse mouth with cool water if tolerated. Monitor for drooling, vomiting, and swelling. If you can't reach a vet, call ASPCA Animal Poison Control on (888) 426-4435 ($95 consult fee) or Pet Poison Helpline on (855) 764-7661. Call your vet if symptoms are significant. If in doubt, call your vet or ASPCA Animal Poison Control at (888) 426-4435 (24/7, charges apply).