Is Marjoram Toxic to Dogs?

⚠️ Mildly ToxicSeverity: Mild

✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit

⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.

Marjoram is mildly toxic to dogs. Eating the herb causes vomiting and diarrhea from its essential oils; the dried spice is equally capable of this.

Also known as: Sweet Marjoram, Knotted Marjoram, Origanum majorana · Origanum majorana

What makes it toxic

Carvacrol and terpinene essential oils that irritate the stomach and intestinal lining in quantity.

Warning signs to watch for

Drooling, vomiting, diarrhea and mild abdominal discomfort within hours of eating leaves or seasoning.

What to do if your dog eats it

Offer water, remove access and monitor. Contact your vet if GI signs persist beyond a day.

Common questions

Can I season homemade dog food with marjoram?

Best to skip it. Small amounts probably cause nothing, but dogs gain nothing from it and concentrated spice adds GI risk for no benefit.

My dog ate a pizza crust with marjoram seasoning — is that bad?

The herb is a mild concern; onion and garlic in the toppings or sauce are the real danger. Call your vet if those were present.

More plants checked for dogs

Pothos☠️ ToxicYes, pothos is toxic to dogs. Chewing any part of the vine releases calcium oxalate crystals tha Aloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to dogs. The skin and latex layer of the leaf contain co Spider Plant✅ Non-ToxicNo, spider plants are non-toxic to dogs. A dog that nibbles the arching leaves is not at risk of Easter Lily⚠️ Mildly ToxicEaster lilies are only mildly toxic to dogs — they usually cause stomach upset, not the fatal ki Sago Palm☠️ ToxicYes — sago palm is severely toxic to dogs, with a documented fatality rate around 50% when untre Boston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to dogs. Chewing a frond will not poison your dog.

This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.