Are Chrysanthemums toxic to cats?
Yes. Chrysanthemums contain pyrethrins, which cause drooling, vomiting, and neurological signs. Usually not fatal but genuinely unpleasant.
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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. Chrysanthemums should never be given deliberately.
- Category: Toxic garden plant
- 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 chrysanthemums
- Move your cat away from any remaining chrysanthemum. Do not try to make them vomit at home — this is dangerous in cats and rarely works.
- Note how much was eaten and when, and keep the packaging or a photo of the plant/substance if you can.
- Call your vet immediately, even out of hours. Tell them your cat's weight, what they ate, and when.
- If you can't reach your vet, call Animal PoisonLine (01202 509000) — paid triage, 24/7 for guidance. They can advise on urgency and route you to emergency care.
What's the full picture?
Chrysanthemums (garden mums) contain pyrethrins — the same compounds used in some insecticides. Cats are particularly sensitive to pyrethrins.
Ingestion usually causes a self-limiting gastrointestinal upset, but larger amounts can cause tremors and neurological signs.
Symptoms to watch for
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Cat owner essentials
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Questions owners ask
Is chrysanthemum poisoning usually serious, or does it settle on its own?
Most cases are self-limiting gastrointestinal upset — drooling, vomiting, and diarrhoea within the first 6 hours — that resolve with basic supportive care. Larger ingestions can progress to tremors and uncoordinated movement between 6 and 24 hours, since pyrethrins affect the nervous system, so while chrysanthemums are less acutely dangerous than cardiac-toxin plants like oleander or foxglove, a cat showing neurological signs still needs a vet visit rather than home monitoring.
Are chrysanthemums as risky as the insecticides that contain pyrethrins?
The concentration in the whole plant is much lower than in a concentrated pyrethrin-based insecticide spray, so a nibbled leaf or petal is a milder exposure than direct insecticide contact. That said, cats are particularly sensitive to pyrethrins as a class, so don't assume 'it's just a flower' — monitor closely and call your vet if symptoms go beyond mild, brief GI upset.
Are there safe alternatives to chrysanthemums for autumn garden colour?
Michaelmas daisies (asters) and ornamental cabbages are generally considered lower-risk options for similar seasonal colour in a border, though as with any plant, it's worth checking a current toxic-plant list for the specific variety before planting near a cat's outdoor territory.
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