Plants Toxic to Dogs: Poisonous Houseplants & Garden Plants

These plants are toxic to dogs, grouped from the most dangerous to those that usually cause mild stomach upset. Sago palm is one of the most dangerous: all parts are toxic and it can cause liver failure.

Pet ate a plant? Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.

Frequently asked questions

What plants are most poisonous to dogs?

Among the plants we cover, sago palm, oleander and autumn crocus are rated highly toxic to dogs.

My dog ate a plant. What should I do?

Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435, and bring the plant or a photo.

Ratings come from the ASPCA Animal Poison Control Center and are cited on each plant page. This list covers the plants we have reviewed so far (52); we add more regularly. Last checked: 2026-11-11. See all plants →

Plants Toxic to Dogs

🔴 Highly toxic to dogs (3)

🟠 Toxic to dogs (19)

🟡 Mildly toxic to dogs (6)

Frequently asked questions

What plants are most poisonous to dogs?

My dog ate a plant. What should I do?