Dogs
Potentially toxicConsulted references classify the plant as toxic or irritating for that pet type.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Sources
dog safety reference
Is Christmas Rose safe for dogs?
Helleborus niger
The Christmas Rose is a perennial flowering plant known for its winter blooms, but it contains cardiac glycosides that are harmful if ingested. It is considered toxic to both cats and dogs.
Black HelleboreChristmas RoseHelleborus niger
- Light
- Partial shade to full shade
- Habit
- Clumping perennial
- Care
- Moderate
Safety status
What this means for your dog
Dogs are at higher risk than cats from Christmas rose simply because they'll chew larger amounts — including roots if they dig the plant up. ASPCA lists it as toxic to dogs; the threat is twofold: a stinging oral irritant (protoanemonin) and cardiac glycosides that can change heart rhythm.
What to watch for
Drooling, lip-smacking, vomiting (sometimes with plant material), diarrhea, abdominal pain, and lethargy. With larger ingestions watch for weakness, slow or irregular heart rate, tremors, and collapse.
Time window
Pet Poison Helpline notes oral and GI signs can begin within an hour; cardiac glycoside effects on heart rhythm and electrolytes can take several hours to manifest. Specific dose-to-onset numbers aren't published.
When to call the vet
Call immediately on suspected ingestion — even moderate doses warrant an ECG and supportive care. ASPCA Animal Poison Control: 888-426-4435.
Sources: ASPCA, Pet Poison Helpline.
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Dogs — concern notes
Common signs
Excessive salivation, vomiting, diarrhea, lethargy, and in severe cases, tremors or heart rate irregularities.
Escalation note
The plant is toxic to dogs and can cause significant gastrointestinal distress and systemic effects. Seek immediate veterinary attention if your dog has consumed any part of this plant.
Safer alternatives
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Source evidence
ASPCA Toxic Plant List
toxicology · 99% reliability
Helleborus niger is listed as toxic to both cats and dogs, containing cardiac glycosides.
Same dog verdict
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