Poisonous Plants To Dogs

Share this and help other dog parents to be aware

Share on facebook
Share on twitter

The more you look, the more poisonous plants to dogs you find! Did you know that daffodil bulbs can cause your dog to vomit? If Rex decides to have a chomp, they could make him feel nauseous, or even increase his heart rate. The beautiful Bergenia in the corner could cause his tongue to swell and block his air way. Fortunately, nature has its own way of repelling your dog from these nasties. So thankfully, incidents of dogs poisoned by plants are fairly low.

Most dogs won’t eat plants that are poisonous to them.

That said, it does pay to be vigilant in the autumn months when bulbs are planted. The more curious dogs do have a habit of digging them up. Attention should also be paid in spring when the bulbs flower.

If you’re not sure about a particular flower or plant, use your mobile to search a picture with Google Lens.

Below is a list of some of the poisonous plants to dogs. There are photos to help you identify them, and a list of possible symptoms to look out for.       
THIS IS NOT A COMPLETE LIST by any means – So please be wary when your dog is around plants.

If your dog chews or eats any of these plants, please seek veterinary help immediately or call the Poison Line. 

poisonous plants to dogs

Aconitum napellus

Monkshood, Wolfsbane and Aconite

  • Abdominal pain
  • Frothing at mouth
  • Heart arrhythmias
  • Numbness
  • Paralysis
  • Seizures
  • Shallow breathing
  • Tremors
  • Vomiting
  • Weakness

Amaryllis bulbs

Hippeastrum

The leaves, stems and bulbs contain phenanthridine alkaloids which can cause:

  • Drooling
  • Vomiting
  • Hypotension (drop in blood pressure)
  • Respiratory depression
  • Abdominal discomfort
poisonous plants to dogs

Asparagus fern

Asparagus Densiflorus or Asparagus Setaceus

  • Vomiting
  • Diarrhoea
  • Abdominal pain
  • Dermal irritatio

Azalea

Ericaceae, Rhododendron, Grayanotoxin

All parts of the plant are poisonous, and just a small ingestion can result in poisoning.

  • Drooling
  • Vomiting
  • Diarrhoea
  • Abdominal pain
  • Inappetence
  • Abnormal heart rate
  • Heart arrhythmias, weakness, hypotension
  • Depression
  • Tremors
  • Transient blindness
  • Seizures
  • Coma
poisonous plants to dogs
poisonous plants to dogs

Bergenia Crassifolia

Elephant Ears

The Bergenia can cause swelling of the tongue. This can cause blockage of the air way leading to death.

  • Burning irritation and swelling of the mouth and throat.

Bluebells

Hyacinthoides Non-Scripta

Bluebell plants and bulbs contain scillarens. Chemicals that reduce the heart rate.

  • Vomiting
  • Diarrhoea
  • Lethargy
  • Disorientation
poisonous plants to dogs

Prevention is better than cure

Hopefully, your dog knows the basic commands such as “NO” and “LEAVE IT.” Obeying these commands might prevent a costly trip to the vet, in more ways than one.

After Preening your garden make sure to sweep up and dispose of flower heads and plant leaves.  Keep an eagle eye on your dog when walking in parks and woodlands too.

Poisonous Plants to dogs

Castor Bean

Ricinus communis

A single seed from this plant can kill a dog.

  • Seizures
  • Coordination problems
  • Vision dullness,
  • Fever
  • Abnormal thirst
  • Rapid heartbeat
  • Sweating
  • Irritation of the mouth
  • Excessive salivation
  • Loss of appetite

Colchicum autumnale

Autumn Crocus, Meadow Saffron or Naked Lady

  • Drooling
  • Vomiting
  • Gastrointestinal bleeding
  • Bloody diarrhea
  • Liver and kidney damage
  • Respiratory failure
  • Seizures
  • Death. 
poisonous plants to dogs

cyclamen

Autumn Crocus, Meadow Saffron or Naked Lady

Cyclamen contains irritating saponins. If any part of the plant, particularly the tubers or roots are chewed or ingested they can cause:

  • Drooling,
  • Vomiting
  • Diarrhoea
  • Abnormal heart rate & rhythm
  • Seizures
  • Death.

Daffodil bulbs

Narcissus

Daffodil poisoning is caused by the flowers, stems, and leaves. The Daffodils contain lycorine, an alkaloid with strong emetic properties. The most concentrated amount of lycorine is found in the bulbs.

  • Drooling
  • Nausea
  • Vomiting
  • Diarrhea
  • Increased heart rate
  • Abdominal pain
  • Abnormal breathing
  • Cardiac arrhythmias
poisonous plants to dogs
poisonous plants to dogs

Delphiniums

Larkspur

The leaves, stems and bulbs contain phenanthridine alkaloids

  • Drooling
  • Vomiting
  • Hypotension (drop in blood pressure)
  • Respiratory depression
  • Abdominal discomfort

Dog's Mercury

Mecurialis perennis

Dog’s Mercury is a highly toxic plant found in woodlands, particularly beech and oak and in shady places, like dense hedgerows.

  • Jaundice
  • Diarrhoea
  • Vomiting
  • Death

Foxgloves

Digitalis Purpurea

Foxglove contains naturally occurring poisons. Specifically, cardenolides or bufadienolides, which affect the heart.

All parts of Foxgloves are highly toxic to dogs.

  • Weakness / Collapse
  • Drooling
  • Nausea
  • Abdominal pain
  • Frequent urination
  • Vomiting / Diarrhea
  • Dilated pupils
  • Tremors / Seizures
  • Cardiac arrhythmias
  • Slowed pulse
  • Death

Hemlock

Conium maculatum

Water hemlock contains the toxins cicutoxin and cicutol. Although all parts of the plant are poisonous, the highest concentration of toxins are found in the roots.

These toxins affect the neurons in the brain as well as the central nervous system.

  • Nervousness
  • Drooling
  • Muscle twitching
  • Dilated pupils
  • Rapid breathing and heart rate
  • Tremors
  • Seizures
  • Coma
  • Death
poisonous plants to dogs

Hyacinth

Hyacinthus Orientalis

Hyacinths contain allergenic lactones and other similar alkaloids and are severely toxic.

  • Intense vomiting
  • Increased heart rate
  • Diarrhoea (occassionally with blood)
  • Depression 
  • Tremors

Hydrangea

Hydrangea macrophylla

This shrub contains cyanogenic glycosides, with higher concentrations found in the leaves and flowers.

  • Lethargy
  • Vomiting
  • Diarrhoea

Ivy

Hedera Helix - Sweetheart, Glacier, Needlepoint and Branching Ivy

The foliage is more toxic than the berries, but both are poisonous to dogs.

  • Excessive drooling
  • Vomiting
  • Diarrhoea

Laburnum

Golden rain tree

The Laburnum tree produces flowering vines which contain quinolizidine alkaloids.

  • Vomiting
  • Weakness 
  • Incoordination

Lilly of The Valley

Convallaria majalis

Lilly of the Valley contains cardiac glycosides which will cause symptoms similar to Foxglove.

  • Vomiting
  • Diarrhoea
  • Drop in heart rate
  • Severe cardiac arrhythmias,
  • Possible seizures

Morning Glory

Ipomoea spp

Morning Glory plants contain lysergic acid or natural LSD (the synthetic variety is roughly 100 times stronger)

  • Hallucination may be caused by the seeds
  • Increase in aggression
  • Inability to stand
  • lethargy with excessive panting

Nightshade

Solanaceae

Deadly Nightshade contains atropine and other toxic alkaloids which cause severe toxicity in dogs.

Poisoning in dogs occurs when dogs consume the leaves, roots, or berries of the Deadly nightshade plant.

  • Mouth dryness
  • Rapid pulse /respiration
  • Fever / Delirium
  • Pupil dilation & Blindness
  • Muscle twitching / Convulsions
  • Anxiety / Confusion
  • Paralysis / Collapse
  • Cardiac arrest
  • Death

Oleander

Nerium oleander, white oleander

Oleander contains cardiac glycoside toxins. These are naturally-occurring poisons that affect the heart.

All parts of this plant are poisonous

  • Drooling
  • Nausea
  • Vomiting & Diarrhea
  • Abdominal pain
  • Drowsiness & Dilated pupils
  • Lack of coordination
  • Lethargy & Weakness
  • Abnormal heart rate
  • Collapse
  • Death

Rhubarb Leaves

Rheum - Pie Plant

Rhubarb stems are edible, but the leaves are not. These contain soluble oxalate crystals. (oxalic acid and oxalate salts)

  • Drooling
  • Lack of appetite
  • Vomiting
  • Diarrhoea
  • Lethargy
  • Weakness
  • Tremors
  • Bloody urine

Sago Palms

Cycas revoluta

The seeds of sago palms are very toxic to dogs.

  • Vomiting
  • Diarrhoea
  • Depression
  • Seizures
  • Liver Failure
poisonous plants to dogs

Sweet Pea

Lathyrus Odoratus

The sweat pea contains amino acids and a toxin called aminoproprionitrite.

  • Neurological Signs
  • Weakness,
  • Lethargy
  • Tremors
  • Seizures.

Tulip Bulbs

Tulipa

Tulip bulbs are very toxic as they contain allergenic lactones or similar alkaloids.

  • Drooling
  • Nausea
  • Vomiting
  • Diarrhoea
  • Increased heart rate
  • Increased respiratory rate
  • Difficulty breathing
poisonous plants to dogs

Umbrella Plant

Cyperus Alternifolius

The Umbrella plant contains insoluble calcium oxalate crystals.

If a dog chews or bites into this plant, tissue penetration and irritation in the mouth and GI tract will occur.

  • Drooling
  • Pawing at the mouth
  • Oral pain
  • Decreased appetite
  • Vomiting

Wisteria

Wisteria sinensis

The seeds and seed pods of the wisteria, are both very poisonous to dogs.

  • Nausea
  • Repeated vomiting
  • Stomach pains
  • Severe Diarrhea
  • Dehydration
  • Collapse.
poisonous plants to dogs

Yew

Taxus baccata

The foilage of the yew is the most toxic part of this plant. 

The berries  are also poisonous to dogs.

  • Dizziness
  • Dry mouth
  • Abdominal cramps
  • Salivation
  • Vomiting
  • Death