Is Coleus Toxic to Cats and Dogs?
Yes, coleus plants are toxic to cats and dogs. The American Society for the Prevention of Cruelty to Animals (ASPCA) lists this plant as toxic to both species, as well as to horses. The plant contains essential oils that are irritating to pets and can cause adverse reactions if any part of the plant is eaten.
Coleus is a common name for a wide variety of plants, and the ASPCA specifies Coleus ampoinicus in its database. This plant is also known by many other names, including Indian Borage, Spanish Thyme, and Bread and Butter Plant. Because common names can be confusing, it is a good practice to confirm a plant’s toxicity with a veterinarian before bringing it into a home with pets.
Coleus: what the ASPCA database lists
| ASPCA entry | Coleus |
|---|---|
| Other common names | Indian Borage, Bread and Butter Plant, Spanish Thyme, East Indian Thyme, Stinging Thyme, Country Boarage; many others |
| Scientific name | Coleus ampoinicus |
| Family | Labiatae |
| Toxic to | Toxic to Dogs, Toxic to Cats, Toxic to Horses |
| Non-toxic to | None listed |
| Toxic principles | Essential Oils |
| Clinical signs listed | Vomiting, diarrhea, depression, anorexia, occasionally bloody diarrhea or vomiting |
What the ASPCA says about coleus
The ASPCA identifies the toxic principles in coleus as essential oils. Ingestion of these oils can lead to several clinical signs in cats and dogs. Pet owners should watch for symptoms such as vomiting and diarrhea. In some cases, the vomiting or diarrhea may contain blood.
Other signs listed by the ASPCA include depression and anorexia, which is a loss of appetite. A pet that has eaten coleus may appear lethargic or refuse to eat its normal food. The severity of the symptoms can depend on various factors, including how much of the plant a pet consumes.
What coleus toxicity means in a home with pets
The presence of a toxic plant like coleus requires careful management in a household with cats or dogs. Pets, especially younger ones, may chew on plants out of curiosity or boredom. Even a small amount of a toxic plant can cause a reaction. The essential oils in coleus can cause significant gastrointestinal upset, leading to discomfort for the animal and concern for the owner.
Recognizing the signs of plant poisoning is key. Symptoms like vomiting, diarrhea, or a sudden change in a pet’s behavior or appetite after potential exposure to a plant should be taken seriously. It is always safest to assume any new plant could be a risk until you have confirmed it is non-toxic to your animals.
Keeping pets and this plant safely apart
The most effective way to prevent coleus poisoning is to ensure pets cannot access the plant. For indoor plants, this means placing them on high shelves, in hanging baskets, or in rooms that are completely off-limits to pets. For outdoor gardens, consider using pet-safe fencing or planting coleus in areas your pets do not visit. Supervision is very important when pets are in areas where toxic plants are grown.
It is also wise to provide pets with safe and appropriate chew toys and enrichment activities. This can help redirect their natural chewing instincts away from household plants. Always read the labels on any plant you bring home and be aware of both its common and scientific names to accurately check its safety profile for pets.
When to call your vet
If your pet chewed or ate part of this plant, call your veterinarian or an animal poison control line. Note which plant and which part, how much may be gone and when, and take a photo or a piece of the plant with you.
If you suspect your cat or dog has eaten any part of a coleus plant, contact your veterinarian or the ASPCA Animal Poison Control Center immediately. Be prepared to tell them what your pet ate, how much you think was ingested, and when it happened. Do not attempt to induce vomiting or provide any home remedies without direct professional guidance.
Emergency signs: go now
- Collapse, fainting or severe weakness
- Seizures, tremors or trouble standing
- Trouble breathing or blue, gray or very pale gums
- Repeated vomiting or retching, or a swollen, painful belly
- Any known contact with a substance listed as toxic, even before signs appear
Book an appointment soon
- Vomiting or diarrhea that lasts or keeps coming back
- Not eating or drinking, or drinking much more than usual
- Drooling, pawing at the mouth or a swollen face
- Lethargy, hiding or acting unlike themselves
ASPCA Animal Poison Control Center: (888) 426-4435 (a consultation fee may apply). Your own vet or nearest emergency clinic is always a good first call.
Sources
Last checked October 21, 2026. Listings and guidance can change; your veterinarian knows your pet’s health history.