Hydrangea
ToxicContains cyanogenic glycosides releasing cyanide.
Quick Answer: Is Hydrangea Toxic to Dogs or Cats?
Use this short answer first, then read symptoms and what to do next.
Is Hydrangea toxic to dogs?
Yes. Hydrangea is toxic to dogs and should be avoided. Contact a veterinarian if your pet ate it or has symptoms.
Is Hydrangea toxic to cats?
Yes. Hydrangea is toxic to cats and should be avoided. Contact a veterinarian if your pet ate it or has symptoms.
Symptoms to watch for
Vomiting, diarrhea, lethargy, depression, red gums
What should I do now?
Contact vet. Usually not fatal.
Dogs
Unsafe
Cats
Unsafe
Risk level
Toxic
Symptoms
Vomiting, diarrhea, lethargy, depression, red gums
What to do now
Contact vet. Usually not fatal.
Explore Related Safety Hubs
Use these hub pages for broader dog, cat, cleaner, and emergency planning guidance.
Dog Toxicity Guide
Compare Hydrangea with common dog food, plant, medication, and household toxicity risks.
Open hubCat poisoningCat Toxicity Guide
See cat-specific guidance for Hydrangea, plants, cleaners, foods, and medication risks.
Open hubEmergency planningVet Cost Hub
Plan for emergency exams, toxin ingestion care, hospitalization, and insurance decisions.
Open hubSymptoms to Watch For
Vomiting, diarrhea, lethargy, depression, red gums
What to Do
Contact vet. Usually not fatal.
Plan ahead for emergency vet bills
Poisoning, broken bones, and emergency surgery can get expensive quickly. Compare costs and accident coverage before you need it.
Pet Poisoning Emergency Checklist
A one-page checklist for symptoms, product labels, emergency contacts, and what to bring to the clinic.
Clinical References
Quick Answers
Is Hydrangea poisonous to dogs?
Is Hydrangea toxic to cats?
What symptoms can Hydrangea cause in pets?
What should I do if my pet ate Hydrangea?
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