A guide to plants poisonous to your dog
Dogs love to explore our yards (and the neighbors’ as well if given the chance), but some plants growing just steps from your door can be harmful—or even deadly—to them. We had several of these in our yard and weren’t even aware how bad they could be for them! Knowing which plants to avoid will help keep your pup safe.
In this guide, we’ll cover poisonous plants for dogs, what makes them toxic, and safer alternatives you can plant instead.
1. Azaleas & Rhododendrons
Toxin: Grayanotoxins
Even small amounts can cause vomiting, drooling, and potentially life-threatening heart problems.
2. Lily of the Valley
Toxin: Cardiac glycosides
Extremely toxic; can cause vomiting, seizures, and heart failure.
3. Tulips and Hyacinths
Toxin: Alkaloids (in bulbs)
Dogs that dig up and chew bulbs may suffer severe stomach upset and drooling.
4. Foxglove
Toxin: Cardiac glycosides
Ingestion can lead to heart rhythm disturbances and death.
5. Sago Palm
Toxin: Cycasin
One of the most dangerous plants for dogs—just one seed can cause liver failure.
6. Aloe Vera
Though helpful to humans, aloe can cause vomiting, diarrhea, and lethargy in dogs.
7. Autumn Crocus
Toxin: Colchicine
Leads to severe vomiting, diarrhea, and potential organ damage.
8. English Yew
Toxin: Taxines
Can cause tremors, difficulty breathing, and sudden death.
9. Daffodils
Toxin: Lycorine
Bulbs are especially toxic, causing vomiting, diarrhea, and convulsions.
10. Holly
Toxin: Theobromine and caffeine-like compounds
Causes stomach upset and drooling; spiny leaves can also injure the mouth.
How to Keep Your Pup Safe
- Know your plants: Identify plants in your yard and remove any harmful ones.
- Supervise outdoor time: Keep an eye on your pup during yard play.
- Create safe spaces: Designate areas free of hazardous plants for your dog.
Signs Your Dog May Have Eaten a Toxic Plant
- Vomiting or diarrhea
- Drooling or foaming at the mouth
- Lethargy or weakness
- Seizures or collapse
- Difficulty breathing
If you suspect plant poisoning: Call your veterinarian or the Pet Poison Helpline (855-764-7661) immediately.
For more information on hazardous plants, you can go to these sites
ASPCA Toxic and Non-Toxic Plants List
https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants
A complete, searchable database of plants and their toxicity to dogs, cats, and horses.
Pet Poison Helpline – Plants
https://www.petpoisonhelpline.com/pet-owners/seasons/plants/
Veterinarian-reviewed list of poisonous plants with photos and treatment advice.
American Kennel Club – Plants Poisonous to Dogs
https://www.akc.org/expert-advice/health/plants-poisonous-to-dogs/
Easy-to-read guide from the AKC with safety tips and symptom checklists.
National Capital Poison Center – Poisonous Plants
https://www.poison.org/articles/poisonous-plants
General poison information and quick reference charts.
Safe Landscaping Alternatives
Swap risky plants for dog-friendly choices like marigolds, sunflowers, snapdragons, or rosemary. Your yard can stay beautiful without putting your pup at risk.
Keep Your Pup Safe Year-Round
Many of these yard plants that are poisonous to dogs look harmless but can be dangerous if chewed or swallowed. By knowing what to avoid, you can keep your garden pet-friendly and your furry friend healthy.