The 9 Most Toxic Outdoor Plants for Dogs (That Might Be in Your Yard Right Now)
As the weather (finally) warms up and you begin to spend more time outside, outdoor safety is always important to keep in mind, and this includes making sure your dog is safe as well. In addition to keeping your furry friend hydrated and preventing them from overheating, you'll also want to know about potential toxic plants that are a medical emergency if ingested by your pup. Some of these plants are actually quite common, and it's vital that you make sure your doggie doesn't consume them.
And if there's a chance your dog may have access to these plants and may accidentally ingest one, knowing what to do to keep your pet safe and healthy is absolutely essential. A little preparedness goes a long way and can help make you feel more equipped to handle the worst-case scenario if it does occur. Accidents do happen, and reacting appropriately (and quickly) is key.
To get more information on the most toxic plants for dogs, we talked to Dr. Jordyn Zoul, a Georgia-based veterinarian at Seaside Veterinary Hospital on St. Simons Island and a vet advisor to pet nutrition and wellness company Spot & Tango. Learn more about each plant, including the symptoms of toxicity, what to do if your dog eats a toxic plant and what each plant looks like.
Why Are Some Plants Toxic to Dogs?
"Most common yard plants aren't terribly toxic to dogs, but technically, enough of anything can be toxic," Dr. Zoul says. "At the very least, eating a large amount of any plant is likely to cause gastrointestinal upset like diarrhea or vomiting. Some plants, however, can cause much more severe signs and should be considered a medical emergency."
Toxic Outdoor Plants for Dogs
These are the nine outdoor plants that are most toxic for dogs.
1. Azaleas
First up is azaleas. These flowers are incredibly toxic to dogs. According to ASPCA Pet Health Insurance, a dog that has eaten azaleas may experience a number of symptoms, including vomiting, diarrhea, a drop in blood pressure, weakness, cardiac failure, coma or even death. Dr. Zoul says that the consumption of azaleas should be treated as a medical emergency.
2. Tulips
Next up? Tulips. Tulips are a beloved flower, but they're actually highly toxic to doggies. "Tulips, with the bulb being the most toxic part, can cause serious GI signs and lethargy," Dr. Zoul says.
Related: Dog Mom Issues Warning After Losing Beloved Spaniel to a Common Spring Flower
3. Daffodils
Another common plant that is toxic for dogs to consume is the daffodil. "Daffodils at a high enough dose can cause convulsions and have cardiovascular effects," Dr. Zoul says.
4. Calla Lily
Another highly toxic plant for dogs is the calla lily. Despite being a beautiful bloom, the calla lily may cause oral irritation, a burning tongue and lips, excessive drooling, vomiting or difficult swallowing in dogs.
5. Eucalyptus
Your dog should also avoid eating eucalyptus, as this plant may cause excessive drooling, vomiting, diarrhea, depression and weakness, according to the ASPCA Pet Health Insurance website.
6. Iris
Iris flowers are fully toxic to dogs, but the most toxic portion is the underground stem (called the rhizomes). These are the most potent part of the iris. If consumed, your dog may vomit, drool, feel lethargic or have diarrhea.
7. Sago Palm
Sago palms are one of the most toxic plants for dogs. This is another one that should be considered a medical emergency if consumed, according to Dr. Zoul. All portions of this plant are toxic, but especially its seeds. Even consuming one seed may result in poisoning or even death, according to petMD.
8. Hydrangeas
As beautiful as hydrangeas are, they may cause toxicity in your pup. According to Garden State Veterinary Specialists, common symptoms of hydrangea poisoning include vomiting, diarrhea, low energy and decreased appetite. Other possible symptoms include excessive drooling and stomach discomfort. For serious cases, your dog may experience breathing trouble, weakness or confusion.
9. Daisy
A very common garden flower is the daisy, but it is toxic to dogs. "Daisies and hyacinth are common yard plants that can cause not only GI upset, but also tremoring or incoordination," Dr. Zoul says.
What to Do Immediately If Your Dog Ingests a Toxic Plant in Your Yard
"Don't wait for symptoms to appear. Call your veterinarian or the ASPCA Animal Poison Control Center right away," Dr. Zoul says. "If you can, bring a photo or sample of the plant so it can be identified quickly. Time matters with plant toxicities; the sooner you act, the more treatment options are available. The ASPCA's toxic plant database is also a reliable resource for checking any specific variety."
The most important thing to do is to act fast if your pet has consumed a toxic plant. Don't hesitate, and don't worry about "overreacting." It's always better to be safe than sorry so you can get your dog the help and support they may need.
Related: 5 Common Houseplants That Are Actually ‘Hidden Dangers' for Your Pets, Say Vets
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This story was originally published May 26, 2026 at 9:55 PM.