Are Snake plants (mother-in-law's tongue) toxic to cats?
Yes. Snake plants (Sansevieria / Dracaena trifasciata) contain saponins that cause vomiting, diarrhoea, and drooling.
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Content compiled with reference to guidance from the Blue Cross, PDSA, Royal Veterinary College (RVC), Battersea, and Animal PoisonLine. This site does not provide veterinary advice — always consult a vet. Last reviewed: 27 September 2026.
Key facts
- Verdict: No — dangerous to cats. Snake plants (mother-in-law's tongue) should never be given deliberately.
- Category: Houseplant
- Onset: Signs can start 0–6 hours — see the full timeline below.
- If it's already happened: Call your vet now, or the Animal PoisonLine on 01202 509000 (24/7, charges apply) — see the emergency steps below.
If your cat has just eaten snake plants (mother-in-law's tongue)
- Move your cat away from the plant. Remove any chewed leaf material from their mouth if safely possible.
- Don't induce vomiting at home.
- Call your vet — snake plant (Dracaena trifasciata) contains saponins that cause drooling, vomiting, and diarrhoea.
- Monitor for persistent symptoms over the next 12 hours; recurrent vomiting or lethargy warrants a vet visit.
- Take a photo of the plant in case identification is needed at the vet.
What's the full picture?
Snake plant (Dracaena trifasciata, formerly Sansevieria) is a common UK houseplant popular because it tolerates low light and irregular watering.
Saponins in the leaves cause drooling, vomiting, and diarrhoea when chewed. Most cats show only mild signs but some develop persistent GI upset.
Safer alternatives for low-light rooms include spider plants, Boston ferns, and parlour palms — all cat-safe houseplants.
Symptoms to watch for
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Cat owner essentials
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Questions owners ask
How much snake plant would it take to cause real symptoms?
Even a small chewed leaf can trigger drooling from the saponins' irritant effect on the mouth, but meaningful vomiting and diarrhoea generally follow larger ingestions rather than a single incidental bite. Most cats show only mild, self-limiting signs, but persistent vomiting, loss of appetite, or lethargy beyond 24 hours should prompt a vet visit rather than continued home monitoring.
Are there safe low-light houseplant alternatives to snake plant?
Yes — spider plants, Boston ferns, and parlour palms are all considered cat-safe and tolerate similarly low light and irregular watering, making them straightforward swaps if you like the low-maintenance appeal of snake plant but want to remove the risk entirely.
How long do snake plant symptoms take to appear, and how long do they last?
Drooling, vomiting, and diarrhoea typically start within 6 hours of a significant chew. Loss of appetite and lethargy can follow at 6–24 hours in more affected cats. Most mild cases resolve within a day or two with basic supportive care, but persistent vomiting or ongoing loss of appetite beyond 24 hours should prompt a vet visit.
If your cat keeps returning to the wrong plant, a pet-safe plant deterrent spray can break the habit without harm.
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Related
Sources referenced for this guidance
- Veterinary Poisons Information Service (VPIS) — UK clinical toxicology reference used by vets
- International Cat Care — feline-specific clinical guidance
- BSAVA — British Small Animal Veterinary Association reference materials
- Merck Veterinary Manual — professional veterinary reference
About this guidance
Every entry on this site is compiled from published UK veterinary toxicology sources — International Cat Care, Veterinary Poisons Information Service (VPIS) references, RCVS-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 UK 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 Animal PoisonLine on 01202 509000 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 What Can My Cat Eat? editorial team