💐Can Dogs Have Hydrangea?
Toxic — Do Not GiveSeverity 5/10
Check hydrangea for your dog
Add your dog's details for a danger level tuned to them.
Why hydrangea is dangerous
A top-five reported toxic-plant exposure in 2025. Leaves and flowers contain cyanide-type compounds.
Signs to watch for
Vomiting, diarrhea, lethargy, low energy
What to do next
Contact your vet if a real amount was eaten.
FAQ
How much hydrangea is dangerous?
Large amounts are needed for serious effects, but GI upset is common.
Can I treat this at home?
A small nibble — watch for vomiting/diarrhea.
When should I call the vet?
Large amounts, or ongoing vomiting and lethargy.
Related plants
Source: ASPCA APCC
This page is a general reference and not a substitute for veterinary advice. If your dog is showing symptoms, contact your veterinarian or an emergency animal hospital.