Wisteria

Yes, wisteria (Wisteria spp.) is toxic to cats. All parts of the plant can cause harm, but the seeds and pods are particularly dangerous and can lead to significant gastrointestinal upset.

ASPCA-documented signs include vomiting (sometimes bloody), diarrhea, and depression. Pet Poison Helpline expands the cat-specific picture to include severe agitation, aggression, drooling, tremors, and respiratory or cardiovascular depression. Symptoms typically appear within a few hours of ingestion, and severe cases can persist beyond 24 hours.

Remove your cat from the plant immediately and call ASPCA Animal Poison Control (888) 426-4435 or Pet Poison Helpline (855-764-7661) right away — don't wait for symptoms to appear. Never try to induce vomiting in cats at home; hydrogen peroxide is dangerous for cats and should never be given.

Yes — the seeds and pods carry the highest concentration of toxic compounds and are the most likely to cause significant gastrointestinal distress. That said, all parts of the plant are considered toxic, so even a single seed warrants an immediate call to your vet or a poison control hotline.

Yes, wisteria is toxic to dogs. All parts of the plant are considered harmful, but the seeds and pods carry the highest concentration of toxic compounds — lectins and wisterin — and can cause gastrointestinal distress even in small amounts.

The primary signs are vomiting (sometimes bloody), diarrhea, and lethargy. Sustained GI losses can lead to dehydration, and bloody vomiting or unresponsiveness are the highest-severity flags that require immediate in-clinic care rather than a phone consultation.

Remove any remaining plant material from your dog's mouth and reach, then call ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661) before attempting any home treatment. Do not give hydrogen peroxide or try to induce vomiting without speaking to a poison-control specialist first — dose and timing matter and the wrong approach can cause additional harm.

The seeds and pods are the most toxic parts, containing lectins and wisterin that are harmful to dogs. That said, the severity guidance indicates that even one or two seed pods can be enough to warrant veterinary care, so any ingestion — seeds, pods, or other plant material — should be treated as a potential emergency.