PlantLegitIs Smooth hydrangea toxic to dogs, cats or kids?
Yes, it can be toxic.
- DogsToxic (ASPCA)
- CatsToxic (ASPCA)
- People & kidsNo poison rating found (NC State Extension)
Sources (6)
- ASPCA plant entry: Hills of Snow (Hydrangea arborescens) – American Society for the Prevention of Cruelty to Animals
- Plants toxic and non-toxic to dogs – ASPCA Animal Poison Control
- Plants toxic and non-toxic to cats – ASPCA Animal Poison Control
- Hydrangea arborescens plant profile, poison fields – NC State Extension Gardener Plant Toolbox
- Poison Help line 1-800-222-1222 – U.S. Health Resources & Services Administration (HRSA)
- Animal Poison Control Center (888) 426-4435 – ASPCA
Think someone ate part of a plant?
- Person or child: call Poison Help 1-800-222-1222 (free, confidential, 24/7; HRSA Poison Help).
- Dog, cat or other pet: call the ASPCA Animal Poison Control Center (888) 426-4435 (24/7; a consultation fee may apply; ASPCA) or your veterinarian.
- Trouble breathing, seizures or collapse: call 911.
Details
ASPCA lists Hills of Snow (Hydrangea arborescens) as toxic to dogs and toxic to cats.
This page summarizes published lists. It is not medical or veterinary advice. Keep plants away from young children and pets, and call the numbers above with any concern. Checked 2026-10-14.