Is Wisteria Toxic to Cats and Dogs?
Yes, wisteria is toxic to both cats and dogs. The American Society for the Prevention of Cruelty to Animals (ASPCA) includes Wisteria spp. on its list of plants that are poisonous to pets. Every part of this popular climbing plant contains toxic compounds, including lectin and wisterin glycoside, which can cause illness if a pet eats them.
While wisteria is known for its beautiful flowers, pet owners should be aware of the risks it poses. Ingestion can lead to serious gastrointestinal upset and other concerning symptoms. It is important to prevent pets from chewing on or swallowing any part of the plant, from the leaves and stems to the flowers and seed pods.
Wisteria: what the ASPCA database lists
| ASPCA entry | Wisteria |
|---|---|
| Other common names | None listed |
| Scientific name | Wisteria spp. |
| Family | Fabaceae |
| Toxic to | Toxic to Dogs, Toxic to Cats, Toxic to Horses |
| Non-toxic to | None listed |
| Toxic principles | Lectin, wisterin glycoside |
| Clinical signs listed | Vomiting (sometimes with blood), diarrhea, depression |
What the ASPCA lists for wisteria
The ASPCA identifies wisteria as toxic to cats, dogs, and horses. The plant belongs to the Fabaceae family. The toxic principles responsible for its effects are listed as lectin and wisterin glycoside. These substances are present throughout the plant.
If a pet consumes wisteria, the ASPCA notes several potential clinical signs. These signs include:
- Vomiting, which may sometimes contain blood
- Diarrhea
- Depression
The severity of these signs can depend on how much of the plant a pet eats. Even a small amount may cause a reaction, so any ingestion should be taken seriously.
What this means for a home with pets
Having wisteria in or around a home requires careful management to protect cats and dogs. Because all parts of the plant are toxic, pets can become ill from chewing on a fallen leaf, a flower, or a seed pod. The drooping flowers and dangling seed pods can be particularly tempting for curious animals to play with or eat.
Puppies and kittens, who often explore the world by mouth, may be at a higher risk of accidental ingestion. Pet owners should be mindful of where wisteria is planted in their yard and whether pets have access to it. It is also important to be cautious with floral arrangements that might include wisteria cuttings, as these are also poisonous.
How to keep cats and dogs and this plant apart
Supervision is key to preventing a pet from eating wisteria. Always monitor dogs when they are outdoors in an area where the plant grows. Keep climbing vines trimmed and out of reach, and regularly clear away any fallen leaves, flowers, or seed pods from the ground.
For cats that go outside, it can be more difficult to control their access to neighborhood plants. Consider creating a safe outdoor enclosure, or catio, that is free of toxic plants. Inside the home, do not bring in wisteria bouquets or cuttings. If you suspect your pet has eaten any part of a wisteria plant, it is best to act quickly and seek professional advice.
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 see your cat or dog eat any part of a wisteria plant or if they show signs like vomiting or diarrhea, call your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 immediately. A consultation fee may apply. Be prepared to tell them what your pet ate, how much you think they consumed, and when it happened. Do not try to treat your pet at home without 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
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- 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.