Plants / Marjoram / dogs

Is Marjoram toxic to dogs?

Marjoram (Origanum majorana) is toxic to dogs (S1 Caution): the ASPCA lists gastrointestinal irritants, with vomiting and diarrhea.

  • TOXINGastrointestinal irritants
  • WHAT TO EXPECTVomiting and diarrhea
  • CALL THE VETContact your vet if vomiting or diarrhea persists or worsens after Marjoram ingestion.
S0S1S2S3S4

Symptoms

SIGN
Vomiting and diarrhea

If your dog just ate it

S1 PROTOCOL
1
Move Marjoram (Origanum majorana) out of your dog's reach. Watch for vomiting and diarrhea. Contact your vet if signs persist or worsen.
2
When to call the vet: Contact your vet if vomiting or diarrhea persists or worsens after Marjoram ingestion.
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Care at a glance

Lightdirect
Waterevery 5–9 days
Humiditymedium
Difficulty●○○

FAQ

Is marjoram toxic to dogs?

Yes, for Origanum majorana: S1 Caution. The ASPCA Marjoram entry lists "Gastrointestinal irritants" and "Vomiting and diarrhea". The toxicity line reads "Toxic to Dogs, Toxic to Cats". Move Marjoram out of your dog's reach and contact your vet if signs persist or worsen.

Which plant does this marjoram verdict cover?

Origanum majorana. The ASPCA Marjoram entry gives that scientific name. Additional names are Knotted Marjoram and Pot Marjoram. The family is Lamiaceae. Oregano is Origanum vulgare hirtum. That page is not this verdict. Check the scientific name on the tag.

What signs does the Marjoram entry list?

The clinical-signs field reads "Vomiting and diarrhea". The toxic-principles field reads "Gastrointestinal irritants". The toxicity line reads "Toxic to Dogs, Toxic to Cats". It does not list horses. Move the plant out of reach and contact your vet if signs persist or worsen.

Is marjoram toxic to cats?

Yes, for Origanum majorana: S1 Caution. The ASPCA Marjoram entry lists "Gastrointestinal irritants" and "Vomiting and diarrhea". The toxicity line reads "Toxic to Dogs, Toxic to Cats". Move Marjoram out of your cat's reach and contact your vet if signs persist or worsen.

CITE THIS PAGE

Verdapaw Plant × Pet Safety Index, verdapaw.com/plants/marjoram, reviewed 2026-11-06