Pet safety
Is White Horehoundtoxic to cats & dogs?
Marrubium vulgare
Quick verdict — at a glance
- Toxic to cats?
- No — non-toxic
- Toxic to dogs?
- No — non-toxic
- ASPCA classification
- Pet-safe · botanical name Marrubium vulgare
Is white horehound safe for cats and dogs?
Yes — ASPCA non-toxic to both cats and dogs. White Horehound is a sensible choice for a pet household; a curious nibble will not poison anyone. This classification follows the ASPCA Toxic and Non-Toxic Plant List, the most widely used reference for companion-animal plant safety in the US and the standard most UK vets cite as well. Marrubium vulgare is not listed as toxic to cats, dogs, or horses by ASPCA and is generally considered non-toxic to pets. However, the plant's bitter marrubiin content may cause mild gastrointestinal upset (vomiting, diarrhea) if consumed in large quantities. It is safe to grow in pet-accessible gardens.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | No | Pet-safe |
| Dogs | No | Pet-safe |
What happens if a pet eats white horehound?
Because white horehound is non-toxic, a curious nibble will not poison a cat or dog. That said, no plant is meant to be eaten: a large quantity of any foliage can still cause mild, short-lived stomach upset or vomiting simply through fibre and volume. Persistent vomiting, diarrhoea, or lethargy after eating any plant is always worth a call to your vet, because the reaction may be to soil, fertiliser, or a pesticide rather than the plant itself.
What to do if your pet ate white horehound
- Remove any plant material from your pet's mouth and move white horehound out of reach.
- Note how much was eaten and when, and watch for drooling, vomiting, or lethargy.
- Do not induce vomiting unless a vet or poison-control specialist instructs you to.
- Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice.
- Bring a leaf or photo of white horehound to the appointment so it can be treated correctly.
This page is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide rather than the plant. If you are worried, always contact a vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.
White Horehound and pets — frequently asked questions
Is white horehound toxic to cats?
White Horehound (Marrubium vulgare) is non-toxic to cats according to the ASPCA. Marrubium vulgare is not listed as toxic to cats, dogs, or horses by ASPCA and is generally considered non-toxic to pets. However, the plant's bitter marrubiin content may cause mild gastrointestinal upset (vomiting, diarrhea) if consumed in large quantities. It is safe to grow in pet-accessible gardens. It is a sensible pick for a cat household, though no plant should be a regular snack.
Is white horehound toxic to dogs?
Per the ASPCA, White Horehound (Marrubium vulgare) is non-toxic to dogs. Dogs that gulp large amounts of any foliage can still get a mild, brief stomach upset, so discourage grazing even on a non-toxic plant.
What happens if my pet eats white horehound?
Because white horehound is non-toxic, a curious nibble will not poison a cat or dog. That said, no plant is meant to be eaten: a large quantity of any foliage can still cause mild, short-lived stomach upset or vomiting simply through fibre and volume. Persistent vomiting, diarrhoea, or lethargy after eating any plant is always worth a call to your vet, because the reaction may be to soil, fertiliser, or a pesticide rather than the plant itself.
What should I do if my cat or dog ate white horehound?
Stay calm. Remove any remaining plant material from your pet's mouth and take the plant away so they cannot eat more. Note roughly how much was eaten and when. Do not make your pet vomit unless a vet or poison-control specialist tells you to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice. Bringing a photo or a leaf of white horehound to the appointment helps the vet treat it correctly.
Which other plants are safe for cats and dogs?
Reliable non-toxic houseplants on the ASPCA list include spider plant, areca palm, calathea, peperomia, and most true ferns. You can browse Growli's full pet-safety library to check any plant before you buy it, and every entry cites the ASPCA classification it is based on.
Full white horehound care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete white horehound care guide, or browse the full pet-safe plant library to check another plant before you buy it.