Is Hosta Toxic to Cats and Dogs?
Yes, hosta plants are toxic to cats and dogs. The American Society for the Prevention of Cruelty to Animals (ASPCA) lists the popular garden plant as harmful to pets if they eat it. This applies to the entire plant, from the leaves to the roots.
Hosta, which also goes by the common names plantain lily and funkia, is a very common feature in shaded gardens. While beautiful, its presence requires caution for households with curious pets that might chew on plants.
Hosta: what the ASPCA database lists
| ASPCA entry | Hosta |
|---|---|
| Other common names | Plantain Lily, Funkia |
| Scientific name | Hosta plataginea |
| Family | Liliaceae |
| Toxic to | Toxic to Dogs, Toxic to Cats, Toxic to Horses |
| Non-toxic to | None listed |
| Toxic principles | Saponins |
| Clinical signs listed | Vomiting, diarrhea, depression. |
What the ASPCA says about hosta
The ASPCA identifies hosta (Hosta plataginea) as being toxic to dogs, cats, and horses. The toxic principles in the plant are identified as saponins. These are naturally occurring chemical compounds that can cause gastrointestinal upset in pets.
If a cat or dog ingests parts of a hosta plant, the saponins can lead to a range of clinical signs. The ASPCA notes the following symptoms associated with hosta poisoning in pets:
- Vomiting
- Diarrhea
- Depression
The severity of these symptoms can depend on various factors, including the individual pet and the amount of plant material consumed. Even a small amount could potentially cause a reaction.
What this means for a home with pets
Having hostas in your yard or home means you must take steps to prevent your pets from accessing them. Cats and dogs explore their environment with their mouths, and a lush, leafy plant can be tempting to chew on out of curiosity or boredom. Puppies and kittens are often particularly at risk due to their inquisitive nature.
The symptoms of vomiting and diarrhea can lead to discomfort and dehydration. Depression in a pet might appear as lethargy, a lack of interest in play, or hiding. Supervising your pets when they are outdoors is a key part of responsible pet ownership, especially if you have potentially toxic plants in your landscaping.
Keeping pets and this plant apart
Preventing your cat or dog from eating hostas is the most effective way to avoid a problem. For outdoor plants, consider using pet-safe fencing or other barriers to create a physical separation between your garden beds and the areas where your pet plays. You might also choose to plant hostas only in parts of your yard that are inaccessible to your animals, such as a fenced-off front yard if your dog only uses the back.
If you bring cut hosta leaves or flowers indoors for arrangements, place them well out of reach of both cats and dogs. Remember that cats can jump onto high surfaces. Always supervise your pet around any new plant or object you bring into your home. Providing plenty of safe chew toys and enrichment can also help redirect a pet’s natural chewing instincts away from household and garden plants.
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 hosta 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 they consumed, and when it happened. Do not wait for symptoms to appear before seeking professional advice.
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.