Is Hortensia toxic to cats and dogs?Hydrangea macrophylla
Hortensia is toxic to cats and dogs.
Hortensia contains hydrangin (cyanogenic glycoside). In cats and dogs, contact or ingestion can cause:
- vomiting and diarrhea
- lethargy and weakness
- irregular heartbeat (in severe cases)
- abdominal pain
Pets at home? The app flags toxic plants before you buy — and warns you if you try to add one.Get the app →
Pet-safety information for catalogue plants uses ASPCA reference data where available. It is reference information, not veterinary advice.
What to do if your pet ate it
If you think your cat or dog ate any part of Hortensia, act quickly. Do not wait for symptoms to appear.
- Remove the plant from the pet's reach.
- Call your vet or an emergency animal clinic immediately.
- You can also contact the ASPCA Animal Poison Control Center (available 24/7): a consultation fee may apply.
Do not induce vomiting unless a vet specifically instructs you to — it can make some poisonings worse.
Pet-safe alternatives with similar light
If you love the look of Hortensia but want a plant that's safer around curious cats and dogs, these non-toxic options have similar light needs:
Round-leaf calathea, Prayer plant, Creeping fig. See all pet-safe alternatives →
Keeping pets safe around plants
Even non-toxic plants can cause mild stomach upset if eaten in large quantities. The Botanicaly app tracks your plants and flags toxicity risks — useful when you're building a pet-friendly indoor garden.
AI plant care in your pocket
Identify your Hortensia and build a basic care schedule for free. Pro adds context-first diagnosis, pruning and repotting advice, and watering tuned to your home's light and weather.
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Get the app →Frequently asked questions
Is Hortensia toxic to cats?
Yes — Hortensia, which contains hydrangin (cyanogenic glycoside), is toxic to cats. If your cat chews or ingests any part of the plant, contact your vet or the ASPCA Animal Poison Control Center right away. Symptoms can include drooling, vomiting, and oral irritation.
Is Hortensia toxic to dogs?
Yes — Hortensia, which contains hydrangin (cyanogenic glycoside), is considered toxic to dogs. Contact your vet immediately if your dog eats any part of it. Do not wait for symptoms.
What should I do if my cat ate Hortensia?
Call your vet or an emergency animal clinic immediately. You can also contact the ASPCA Animal Poison Control Center (24/7). Try to bring a piece of the plant or a photo so the vet can identify the species. Do not try to induce vomiting unless instructed by a professional.
Can I keep Hortensia with pets?
Hortensia is toxic to cats and dogs, so it is best kept out of reach — ideally in a room your pets cannot access, or replaced with a non-toxic alternative. See the pet-safe alternatives listed on this page.
