Is Cats Safe?
Is Hydrangea Safe for Cats?
No — Hydrangea is toxic to cats.
Hydrangea (Hydrangea arborescens) is toxic to cats due to a cyanogenic glycoside it contains. Exposure typically causes gastrointestinal disturbance rather than severe cyanide intoxication. If your cat has contacted this plant, contact your vet promptly.
| Scientific name | Hydrangea arborescens |
|---|---|
| Family | Hydrangeaceae |
| Category | Plants |
| Toxic principle | Cyanogenic glycoside |
| Also known as | Hills of Snow, Hortensia, Seven Bark |
Signs to watch for in cats
- Vomiting
- Depression
- Diarrhea. Cyanide intoxication is rare - usually produces more of a gastrointestinal disturbance
If your cat may have been exposed to Hydrangea:
- Don't wait for symptoms; don't induce vomiting unless a professional tells you to.
- Note what and how much, and take any packaging with you.
- Call your vet or a 24/7 line now — Pet Poison Helpline 855-764-7661 · ASPCA 888-426-4435.
Cat-safe alternatives
Browse all Plants for cats · or check another item.
Frequently asked questions
Is Hydrangea toxic to cats?
Yes. Hydrangea is reported toxic to cats by ASPCA Animal Poison Control. Keep it away from your cat.
What are the symptoms if a cat is exposed to Hydrangea?
Reported signs include: Vomiting, Depression, Diarrhea. Cyanide intoxication is rare - usually produces more of a gastrointestinal disturbance.
What makes Hydrangea toxic to cats?
The harmful component reported for Hydrangea is Cyanogenic glycoside. Cats metabolise many such compounds poorly, so even small exposures can cause problems.
How much Hydrangea is dangerous to cats?
There is no established "safe" amount — sensitivity varies by cat, and small exposures can still cause signs. Treat any exposure as potentially serious rather than waiting to see how much was involved.
What should I do if my cat ate Hydrangea?
Contact your vet or a 24/7 animal poison line right away: Pet Poison Helpline (855-764-7661) or ASPCA Animal Poison Control (888-426-4435).