The inch plant is an invasive weed excellent at smothering other plants in the area and taking over. In addition to this unfortunate quality, it is also toxic to your dog. If you believe your dog came into contact with this plant, contact your veterinarian.

The inch plant is native to a few regions, but is considered invasive in most. It takes over native vegetation very quickly and kills everything out so that it may thrive. While this alone can be frustrating, it is also toxic to your dog. There have not been any reported cases of toxicity from ingestion, but toxicity from coming into contact with the plant. In most cases, dogs will develop contact dermatitis and possibly a secondary infection if not treated properly. Treatment is as simple as oral or topical medication making recovery from toxicity of this plant easy for you and your dog.

Symptoms may vary from case to case. Also, onset of symptoms may also vary. Symptoms may include:

The inch plant is an invasive weed that causes dermatologic irritation when it comes into contact with your dog. This plant belongs to the Commelinaceae family and the genus Tradescantia. The species can be found spelled one of two ways: Tradescantia flumeninsis or Tradescantia fluminensis. It can also be known by the common names of Variegated inch plant and Speedy Henry. This plant spreads very quickly and smothers other native plants in the area. It is considered a plant pest in some regions making it unavailable to purchase or distribute.

The exact name of the irritant from the inch plant plant is unknown. Scientists just know it causes allergic dermatitis in dogs as well as other species when they walk through the plant. Symptoms appear in accidental contact cases as well as when applied on purpose for scientific studies. The inch plant does not necessarily cause a toxic like reaction in dogs, but more of an allergic reaction. There have been no reported cases of ingestion of this plant by a dog, but it can be assumed if it is ingested, he may develop redness, itching, and irritation of the mouth as well.

If you notice your dog’s skin is red or if he is experiencing a lot of scratching or fur loss, take him to the veterinarian. Upon arrival, the veterinarian will begin by performing a physical exam. She will make note of any and all of his symptoms and evaluate his vitals for any abnormalities. 

She may then proceed to take a skin scraping sample from your dog. She will take a scalpel blade and scrape off a thin layer of your dog’s skin to view under the microscope. This will allow her to check for external parasites or bacterial overgrowth, both of which can also cause the dermatologic symptoms. 

The veterinarian may want to do blood work for diagnostics. When a certain white blood cell level (eosinophil level) is elevated, it is indicative of an allergy. By running a complete blood count (CBC), she will get the needed information to see if this is occurring. She may also decide to run a chemistry panel for a basic overview of your pet as a whole to check how his internal organs are functioning, especially if she suspects a toxin is the cause of his symptoms. 

When discussing your dog’s symptoms with the veterinarian, be sure to mention any and all details of what he was doing before his symptoms appeared. For example, if you were out on a walk, tell her; if he was romping around a field with unknown vegetation, tell her. While it may seem like an unimportant detail to you, it may be the key to the proper diagnosis.

If your dog is experiencing a lot of scratching, the veterinarian will prescribe an ointment or tablets as relief. You may need to apply an ointment  two to three times a day, but it has been proven to help. If your dog scratches continuously, he may develop a secondary infection of the skin and will then need antibiotics as well. A buster collar can limit self trauma, as can clipping claws short.

The veterinarian may decide to administer intravenous or subcutaneous fluids to your dog depending on his need. This is more likely if his mouth has been affected and he is not keen to eat or drink. The fluids will ensure he stays hydrated while waiting for his symptoms to subside. If any irritation of the eyes occurs, she may rinse out his eyes or prescribe an ointment or drops for you to apply at home for a few days.

If your dog is scratching excessively and has some sort of skin irritation or rash, go ahead and take him to the veterinarian. If you are able to stop the scratching before it turns into a skin infection, he will heal much quicker and with the least amount of medications possible.

Toxicity of the inch plant may be considered mild. Since toxicity symptoms typically manifest as some form of dermatitis, dogs usually recover well with supportive therapies. If you know you have this plant on your property or know it is located nearby, trying to keep your dog away from it is the best thing for him. If desired, you can remove this plant from your property once you notice it; the sooner the better, since it grows extremely fast.