Poisonous plants and flowers for dogs
Many houseplants, garden plants and plants you meet on walks are toxic to dogs, from a simple mouth irritant to a heart poison. The right reflex fits in one sentence: the moment a plant is swallowed, call the vet or an animal poison centre, without waiting for symptoms and without ever inducing vomiting.
Why your dog tastes plants
A dog explores the world with his mouth: he tastes, he swallows fast, often before you can react. Bright berries draw him in, and a bulb looks just like an onion to a dog who loves to dig. The trap is that several poisons act silently: with sago palm, autumn crocus or grapes, he can seem perfectly normal for hours while the liver, kidneys or heart are already suffering. You cannot rely on his instinct to sort out what is dangerous: it is up to the environment and to training to protect him.
The part matters. For many species the poison is concentrated in the seeds, the bulb, the root or the sap, not in the rest of the plant. And drying changes nothing: yew needles after a hedge trim, or a wilted bunch of lily of the valley, stay toxic.
The plants to know, ranked by severity
These levels guide your vigilance, they never replace the vet's advice, who alone can judge the real situation (species, part swallowed, quantity and the dog's weight).
Life-threatening (can kill, sometimes in small amounts)
Serious to moderate toxicity (keep away and watch closely)
Bad reputation, in fact barely dangerous for dogs
This list is not exhaustive. Faced with an unknown plant that has been chewed, treat it as a risk.
If your dog has touched or swallowed a plant
Your priority is not to treat him yourself, but to call quickly and gather the right information.
Call straight away
Your vet, the emergency clinic or an animal poison centre (in the UK, the Animal PoisonLine or your vet out-of-hours service), without waiting for symptoms.
Do not induce vomiting yourself
Depending on the plant, it is useless or dangerous. No milk, no oil, no "home remedy": it is the vet who decides.
Note the right information
Which plant, which part (bulb, berries, leaves), the estimated quantity and the time it was eaten.
Bring a clue
A fragment or a photo of the plant helps a great deal to identify it.
The signs vary with the plant. At any sign after contact or ingestion, you call.
Keep an eye out
- Heavy drooling, the dog shakes his head
- Irritation or pain in the mouth
- A single, isolated bout of vomiting
It is getting worse
- Repeated vomiting or diarrhoea, sometimes with blood
- Dullness, trembling
- Wobbly, unsteady walk
Life-threatening emergency
- Weakness or heart rhythm disorders (oleander, yew, lily of the valley)
- Seizures
- Collapse or loss of consciousness
Sudden weakness, heart rhythm disorders, seizures or collapse after a swallowed plant: this is a life-threatening emergency.
Do this right now
- Call the vet or an animal poison centre on the way
- Keep the dog calm, without giving him anything to swallow
- Bring a fragment or a photo of the plant
The assistant never replaces a vet. When in doubt, call.
Prevention: three habits that protect
At home
- Take stock of your potted plants and put the most dangerous ones (sago palm, dieffenbachia, oleander in a tub) out of reach.
- Keep bouquets and vase water (lily of the valley, foxglove) up high.
- In the dog's spaces, prefer plants known to be safe (spider plant, calathea, Boston fern).
In the garden
- Spot and remove oleander, yew, rhododendron, castor bean and spring bulbs.
- Pick up acorns, chestnuts, berries and pruning waste.
- Close off access to the compost and to spent brewing grains.
On walks
- Watch for bright berries and fleshy dug-up roots at the water's edge.
- Work on "leave it" and a solid no-scavenging cue: it is the most reliable barrier.
- Faced with an unknown plant that has been chewed, treat it as a risk and ask the vet or a poison centre for advice.
- Animal Poison Control Center (APCC), plant toxicology database, ASPCA
- Veterinary toxicology: plants and toxins in dogs, Merck Veterinary Manual
- Poison list (plants toxic to dogs), Pet Poison Helpline
- Veterinary poison centres (CNITV Lyon, CAPAE-Ouest Nantes / Oniris), Centres antipoison animaux français
To go further
Frequently asked questions
Which plants are toxic to dogs?
The most serious attack the heart, the nerves, the liver or the kidneys: oleander, yew, sago palm (false sago), castor bean, lily of the valley, autumn crocus, aconite, rhododendron. To these add very common irritants such as dieffenbachia or philodendron. The part matters: seeds, bulb and sap concentrate the poison. Faced with an unknown plant, treat it as a risk.
Is lily of the valley toxic to dogs?
Yes. Lily of the valley (Convallaria majalis) is cardiotoxic for dogs as for cats, and the whole plant counts, including the vase water. At the slightest ingestion, call the vet or a poison centre without waiting for symptoms, and do not induce vomiting.
Oleander: what danger for dogs?
Oleander (Nerium oleander) is one of the most dangerous plants: the whole plant, dried leaves included, attacks the heart, and a few leaves can be enough. Keep it out of reach. In case of ingestion, it is an emergency: call at once, even before the first signs.
Which houseplants are dangerous for dogs?
The sago palm (false sago, often sold as a palm) is the most serious (liver). Also very widespread, the Araceae (dieffenbachia, philodendron, pothos, monstera) burn the mouth the moment he chews them. Place them up high; on the safe side, the spider plant or the calathea are good choices.
My dog has eaten a tulip or daffodil bulb, what should I do?
The bulb is the most toxic part: a dog digs it up thinking it is an onion. Intense vomiting is possible, and a large bulb can cause a blockage. Do not induce vomiting, call the vet and note the time and the quantity swallowed.
Are lilies dangerous for dogs?
True lilies are mainly a danger for cats (devastating kidney failure, even from a trace). In dogs, they usually cause only mild digestive upset. Watch out for lily of the valley, which really is cardiotoxic for dogs.
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