Are gardenias toxic to dogs?

Yes. The ASPCA lists Gardenia jasminoides as toxic to dogs. The toxic compounds are genioposide and gardenoside. Ingestion is generally mild, typically causing gastrointestinal upset rather than life-threatening illness.

What happens if my dog eats a gardenia plant?

Per the ASPCA, dogs that ingest gardenia may develop mild vomiting and/or diarrhea, and hives (skin reaction). Signs are usually mild and self-limiting, but contact your veterinarian if your dog ingests a large amount or shows persistent symptoms, dehydration, or distress.

Are gardenias also dangerous to cats?

Yes. The ASPCA lists gardenia as toxic to cats and horses as well as dogs, with the same toxic principles (genioposide, gardenoside) and similar signs of mild vomiting, diarrhea, and hives.

Are Gardenias Poisonous to Dogs?

Gardenia jasminoides · Rubiaceae

Mildly ToxicAlso toxic to cats

Gardenias are mildly toxic to dogs.

Why it's toxic

The toxic compounds in gardenias:

Genioposide
Gardenoside

Symptoms to watch for

If your dog ate gardenias, watch for:

Mild vomiting
Diarrhea
Hives

What to do if your dog ate it

1Remove your dog's access to the gardenias and check how much may have been eaten.
2Do NOT induce vomiting unless a veterinarian or poison-control expert specifically tells you to.
3Call your veterinarian, the ASPCA Animal Poison Control Center (888) 426-4435, or the Pet Poison Helpline (855) 764-7661 right away.
4Note the amount eaten, the time, and your dog's weight and any symptoms — have this ready for the expert.
5Follow professional guidance and go to the nearest emergency vet if you are advised to.

📞 ASPCA Poison Control (888) 426-4435 📞 Pet Poison Helpline (855) 764-7661

A consultation fee may apply to the Pet Poison Helpline. When in doubt, contact your own veterinarian or nearest emergency clinic.

Frequently asked questions

Are gardenias toxic to dogs?: Yes. The ASPCA lists Gardenia jasminoides as toxic to dogs. The toxic compounds are genioposide and gardenoside. Ingestion is generally mild, typically causing gastrointestinal upset rather than life-threatening illness.
What happens if my dog eats a gardenia plant?: Per the ASPCA, dogs that ingest gardenia may develop mild vomiting and/or diarrhea, and hives (skin reaction). Signs are usually mild and self-limiting, but contact your veterinarian if your dog ingests a large amount or shows persistent symptoms, dehydration, or distress.
Are gardenias also dangerous to cats?: Yes. The ASPCA lists gardenia as toxic to cats and horses as well as dogs, with the same toxic principles (genioposide, gardenoside) and similar signs of mild vomiting, diarrhea, and hives.

Sources

ASPCA Animal Poison Control - Gardenia

Last updated 2026-06-25

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This page is for general educational purposes and is not a substitute for professional veterinary advice. Toxicity can vary with the amount eaten, your dog's size, and individual sensitivity. If you suspect poisoning, contact a veterinarian or poison-control hotline immediately.