Flowers & Plants

Can dogs and cats eat hydrangea?

Short answer on hydrangea: toxic for both dogs and cats. See what to watch for and the veterinary sources behind each answer.

If your pet ate this, contact your veterinarian or the ASPCA Animal Poison Control Center immediately.

One food, two pets

What changes between dogs and cats?

Dogs and cats both have a toxic verdict.

Dogs and cats get the same answer here. Each column below lists its own signs to watch and sources.

Toxic

Hydrangeas are toxic to dogs. Ingestion most often causes vomiting, depression, and diarrhea.

Toxic principle: cyanogenic glycoside

Watch for

Sources

Reviewed 2026-07-28

Toxic

Hydrangeas are toxic to cats. Ingestion most often causes vomiting, depression, and diarrhea.

Toxic principle: cyanogenic glycoside

Watch for

Sources

Reviewed 2026-07-28

Can dogs eat hydrangea?

Hydrangeas are toxic to dogs. Ingestion most often causes vomiting, depression, and diarrhea.

What should I do if my dog ate hydrangea?

Contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 immediately. Do not wait for symptoms to appear before calling.

What symptoms should I watch for with hydrangea and dogs?

vomiting, depression, diarrhea. If you notice any of these, contact your veterinarian.

Can cats eat hydrangea?

Hydrangeas are toxic to cats. Ingestion most often causes vomiting, depression, and diarrhea.

What should I do if my cat ate hydrangea?

Contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 immediately. Do not wait for symptoms to appear before calling.

What symptoms should I watch for with hydrangea and cats?

vomiting, depression, diarrhea. If you notice any of these, contact your veterinarian.

This page is for informational purposes only and is not veterinary advice. Always consult your veterinarian about your pet's diet and health.

Read our methodology for how every verdict is sourced and reviewed.