Is Hydrangea Toxic to Dogs?

Yes — Hydrangea is mildly toxic to dogs

Hydrangeas contain small amounts of cyanogenic glycosides but serious poisoning is rare — pets would need to eat very large quantities. The bitter taste deters most animals from eating enough to cause serious harm.

Symptoms in Dogs

If your dog eats Hydrangea, watch for these symptoms (onset: 2-6 hours):

  • Vomiting
  • Diarrhea
  • Lethargy
  • Depression

What To Do

Monitor at home for mild cases. Large ingestion is unlikely due to bitter taste. See vet if symptoms persist.

Dog-Safe Alternatives to Hydrangea

✓ Sunflower ✓ Rose ✓ Snapdragon

Quick Facts

Hydrangea macrophylla

Yes (mild)

Cyanogenic glycosides (hydrangin)

leaves, flower buds

Sources: ASPCA Animal Poison Control Center, Pet Poison Helpline. View full Hydrangea toxicity profile.