If you are wondering, can dogs eat nasturtium, the quick answer is yes. The American Society for the Prevention of Cruelty to Animals (ASPCA) classifies nasturtium as non-toxic to dogs, cats, and horses. An accidental nibble in your garden is highly unlikely to cause a medical emergency.
However, being non-toxic does not mean this bright flower makes a good canine snack. Nasturtiums contain natural mustard oils that give them a spicy, peppery flavor. If your dog eats a large amount of the leaves or petals, they may experience mild stomach discomfort.
Are Nasturtiums Safe for Dogs to Eat?
While the plant is technically safe, different parts carry slightly different levels of irritation for pets. Here is a breakdown of how the various plant parts might affect your dog.
| Plant Part | Digestibility | Potential Canine Risk |
| Flowers (Petals) | Easily digested | Very low risk; mild peppery taste may cause drooling. |
| Leaves | Fibrous | Low risk; harder to break down, can cause minor upset. |
| Stems | Tough and stringy | Mild risk; difficult to chew and digest properly. |
| Seeds | Hard and concentrated | Moderate risk; highly spicy and tough on the stomach. |
The Mild Risk: Peppery Oils and Digestion
Nasturtiums owe their signature bite to mustard oils, specifically a compound called benzyl isothiocyanate. While humans enjoy this spicy kick in summer salads, it can easily irritate a dog’s sensitive stomach.
| Symptom | Description | Urgency Level |
| Drooling | Excessive saliva caused by the spicy flavor. | Low; usually resolves quickly on its own. |
| Lip Smacking | Attempting to clear the peppery taste from the mouth. | Low; offer fresh water to help clear the palate. |
| Mild Vomiting | Rejecting the fibrous plant material. | Moderate; monitor to ensure it stops after one episode. |
| Soft Stool | Minor disruption to normal digestion. | Moderate; should return to normal within 24 hours. |
What to Do If Your Dog Eats Nasturtium
Most dogs will spit out nasturtium after one bite because the spicy flavor acts as a natural deterrent. However, some highly food-driven dogs might swallow enough to make themselves slightly sick.
“While nasturtium is non-toxic, any sudden introduction of novel plant material can cause temporary gastrointestinal upset in dogs.”
Immediate Steps for Pet Owners
If you catch your dog chewing on these bright flowers, gently guide them away from the garden bed. Review this simple action plan to handle the situation calmly.
| Step | Action to Take | Why It Helps |
| 1. Remove the Plant | Take any remaining plant pieces out of their mouth. | Prevents further consumption and stomach irritation. |
| 2. Offer Water | Provide a bowl of cool, fresh water. | Helps wash away the spicy mustard oils and clears the throat. |
| 3. Monitor | Watch for vomiting, diarrhea, or lethargy over 12 hours. | Ensures the stomach upset is mild and passing naturally. |
| 4. Call the Vet | Contact a veterinarian if symptoms are severe or prolonged. | Rules out the possibility that they ate a different, toxic plant. |
The Chemical Makeup of Nasturtiums
Nasturtiums are prized by gardeners for their vitamin C content and natural pest-repelling properties. However, a dog’s digestive system processes these natural chemicals differently than ours does.
| Chemical Compound | Function in the Plant | Effect on Dogs |
| Benzyl Isothiocyanate | Creates a peppery defense mechanism against insects. | Irritates the canine stomach lining in large doses. |
| Vitamin C | Supports plant growth and cellular health. | Unnecessary; dogs naturally synthesize their own Vitamin C. |
| Lutein | A carotenoid pigment that gives flowers their color. | Safe, but provides negligible nutritional benefit for dogs. |
Understanding Garden Safety and Foraging
Dogs explore their environment by tasting things, making garden safety a top priority for pet owners. Nasturtiums are often used as companion plants, meaning they frequently grow next to highly toxic vegetables or flowers.
| Common Companion Plant | Toxicity Status for Dogs | Primary Danger |
| Tomatoes (Leaves/Stems) | Toxic | Contains tomatine, which causes severe stomach upset. |
| Onions and Garlic | Highly Toxic | Destroys red blood cells, leading to severe anemia. |
| Cucumbers | Safe | Non-toxic and safe for dogs to eat as a crunchy snack. |
| Marigolds | Mildly Toxic | Can cause irritation to the mouth and gastrointestinal tract. |
How to Stop Your Dog from Eating Garden Plants
Even safe plants can cause stomach cramps or diarrhea if your dog eats a massive quantity of them. Preventing access to your flowerbeds is the best way to keep their digestive tract happy.
| Prevention Method | How It Works | Best Used For |
| Physical Barriers | Blocks access to garden beds using fencing. | High-energy dogs that love to dig and forage freely. |
| Taste Deterrents | Bitter apple sprays make plants taste terrible. | Dogs that only take occasional, curious test bites. |
| Raised Planters | Elevates the plants above the dog’s eye and nose level. | Small to medium breeds that cannot reach high surfaces. |
You can also apply these practical training methods and environmental changes to curb unwanted foraging behavior completely:
- Keep dogs directly supervised when exploring new or unfamiliar garden areas.
- Teach a strong and reliable “leave it” or “drop it” command.
- Use raised garden beds or physical fencing to keep plants completely out of reach.
- Provide safe, dog-friendly chew toys outdoors to redirect their chewing instinct.
Frequently Asked Questions
Can dogs eat nasturtium flowers?
Yes, the flowers are completely non-toxic to dogs. However, their naturally peppery flavor might cause mild drooling or temporary stomach upset if your dog eats a large amount.
Are nasturtium leaves poisonous to dogs?
No, the leaves are not poisonous and are safely classified as non-toxic by the ASPCA. They contain the same spicy oils as the flowers, which can cause minor digestive irritation.
Why does my dog eat nasturtium plants?
Dogs often eat plants out of curiosity, boredom, or a desire for dietary roughage. Sometimes the unique, pungent smell of the plant encourages them to take a test bite.
Can dogs eat nasturtium seeds?
The seeds are non-toxic but can be difficult for a dog to digest properly. They are particularly spicy and may cause more intense stomach cramping than the soft, easily chewed petals.
What to Remember About Dogs and Nasturtiums
The most important takeaway is that nasturtiums will not poison your dog. If your pet manages to snatch a fallen petal or leaf from the garden, there is absolutely no need to panic. The plant’s natural spiciness usually stops dogs from coming back for a second bite.
Always monitor your dog around outdoor plants and focus on preventing unwanted grazing habits. If you notice severe vomiting or diarrhea after they eat any garden plant, contact your veterinarian promptly to rule out exposure to other toxic garden hazards.