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 Sweet Marjoram safe for dogs?
Origanum majorana
Marjoram is a popular culinary herb often grown in kitchen gardens or as a potted plant. While widely used in cooking, ingestion of large quantities by pets can lead to gastrointestinal distress.
Knotted MarjoramOriganum hortensisOriganum majoranaSweet Marjoram
- Light
- Full sun
- Habit
- Mounding
- Care
- Low
Safety status
What this means for your dog
Dogs that grab a mouthful of marjoram from a herb pot or garden bed almost always end up with garden-variety digestive upset rather than a serious poisoning. ASPCA flags it as toxic because its essential oils irritate the GI tract, but a few chewed leaves rarely cause more than vomiting or loose stool. Larger ingestions or concentrated marjoram essential oil are a different story.
What to watch for
Vomiting and diarrhea are the headline signs. You may also see drooling, hesitation to eat, or mild belly tenderness. Concerning signs are repeated vomiting beyond a day, blood in stool, severe lethargy, or any neurologic change after essential-oil exposure.
Time window
Signs usually start within 1–4 hours and clear within 12–24 hours with supportive care. Exact dose-response isn't documented for dogs by the cited source.
When to call the vet
Call if vomiting or diarrhea persists past 24 hours, the dog can't keep water down, or you see blood in vomit/stool. Call immediately for any contact with concentrated marjoram or oregano essential oil, especially in small or young dogs.
Sources: ASPCA (no first-aid guidance).
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
Vomiting, diarrhea, and potential gastrointestinal upset.
Escalation note
Ingestion usually results in mild digestive upset. Monitor your pet closely and contact a veterinarian if symptoms persist or if a large quantity was consumed.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
ASPCA Toxic Plant List
toxicology · 99% reliability
Marjoram is listed as toxic to both cats and dogs due to potential gastrointestinal irritation.
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