Is it toxic to dogs?
Wisteria
Wisteria spp. · Fabaceae
Also called Chinese wisteria, Japanese wisteria
Toxic to dogs
Severity: Moderate
Yes. The ASPCA lists wisteria as toxic to dogs. The seeds inside the pods are the biggest concern, and they can cause repeated vomiting and diarrhea, sometimes with blood in the vomit.
- Toxic parts
- All parts, Seeds and seed pods (most concentrated)
- Toxic compounds
- Lectin, wisterin glycoside
- Where you’ll find it
- Garden
Signs of poisoning
- Vomiting (sometimes with blood)
- Diarrhea
- Depression
- Dehydration
- Weakness or collapse after a large amount
Why it’s harmful to dogs
Wisteria is the twining, long-lived vine famous for spring flower clusters that hang like purple, blue or white waterfalls. After flowering it sets velvety, bean-like pods full of hard seeds, and that is the part dog owners need to watch.
The ASPCA lists lectin and a glycoside called wisterin as the toxic principles, with vomiting (sometimes bloody), diarrhea and depression as the signs. Pet Poison Helpline says toxic compounds are found throughout the plant but are concentrated in the seeds in the pods. It describes severe vomiting and diarrhea that can lead to dehydration, weakness and collapse.
The risk rises when pods drop onto lawns and patios, where a curious or hungry dog can find them. Because severe vomiting and dehydration are possible, wisteria sits a notch above the milder garden plants. It is not a plant to shrug off if your dog ate a handful of seeds.
If your dog ate wisteria
Take any pods or seeds away from your dog and call your vet or ASPCA Animal Poison Control at (888) 426-4435 or Pet Poison Helpline at (855) 764-7661 (US; fees may apply) promptly, especially if your dog ate pods or seeds. Don't wait for signs to build.
Go to an emergency clinic if your dog vomits blood, keeps vomiting, has bloody diarrhea, or seems weak or collapses. Outside the US, call your local emergency vet. Don't try to make your dog vomit at home. Bring a pod or photo of the plant and note when your dog ate it and roughly how much.
Keeping your dog safe
Pick up fallen pods and seeds as soon as they drop, especially in late summer and fall. Train wisteria up a pergola or wall rather than letting it spill across the lawn, and keep your dog out of the area under mature vines when pods are ripe.
For a fragrant climber with less drama, consider a climbing rose and build a reliable "leave it" on every walk.
Dog-safe alternatives
Frequently asked questions
Which part of wisteria is most dangerous?
Pet Poison Helpline says toxic compounds are found throughout the plant but are concentrated in the seeds in the pea-like pods.
Can wisteria make a dog vomit blood?
The ASPCA lists vomiting, sometimes with blood, among the signs. Treat any bloody vomit as a reason to call your vet or an emergency clinic.
Are all wisteria species toxic?
The ASPCA lists the genus as a whole, so treat Chinese, Japanese and American wisteria alike.
Written from veterinary sources by the Pawsplained editorial team. Not yet reviewed by a veterinarian; this is general information, not a diagnosis or treatment plan. Updated Oct 30, 2026. Editorial policy