The Garden Goddess - Turning Mess into Magnificence
Gardening The Vines and Ellenbrook
Toxic Plants

Some plants are toxic and dangerous to humans and animals, particularly dogs and cats. Below is a list of the main plants that cause issues, together with symptoms when ingested.

Castor oil plant  
Toxic to humans - the seeds, flowers and leaves. A few seeds can be fatal to a child.

Coral tree 
Toxic to humans. The leaves, bark and seeds are poisonous. The seeds are particularly toxic for children.

Deadly nightshade
Toxic to humans. The round purple/black berries on this plant are highly toxic.

Rhus or wax tree 
Toxic to humans. This plant can trigger strong allergic reactions in many people, causing rashes, redness, itchiness and blisters over the course of a week or longer. Avoid contact even as a result of touching clothing or tools, or exposure to sawdust or ash.

Aloe vera
Toxic to cats and dogs. 
Symptoms: Vomiting, depression, diarrhea, anorexia, tremors, change in urine color.

Amaryllis
Toxic to both cats and dogs. The actual bulbs, they contain the most toxins.
Symptoms: Vomiting, depression, diarrhea, abdominal pain, hypersalivation, anorexia, tremors.

Azalea/Rhodedendron
Not only toxic to cats and dogs, this is also dangerous for horses, goats and sheep–and ingestion of just a few leaves can cause serious problems.
Symptoms:  Acute digestive upset, excessive drooling, loss of appetite, frequent bowel movements/diarrhea, colic, depression, weakness, loss of coordination, stupor, leg paralysis, weak heart rate and recumbency for 2 or more days; at this point, improvement may be seen or the animal may become comatose and die.

Baby’s Breath
Toxic to both cats and dogs.
Symptoms: Vomiting, diarrhea.

Begonia
Toxic to both dogs and cats. The tubers are the most toxic part.
Symptoms: Oral irritation, intense burning and irritation of mouth, tongue and lips, excessive drooling, vomiting, difficulty swallowing.

Carnations
Mildly poisonous and symptoms:  Mild gastrointestinal signs, mild dermatitis.

Chrysanthemum
dogs and cats may still be drawn to it. It’s not likely to cause death, but can cause quite a bit of discomfort.. Symptoms:  Vomiting, diarrhea, hypersalivation, dermatitis.

Cyclamen
Toxic to both cats and dogs. The highest concentration of the toxic component is typically located in the root portion of the plant.
Symptoms:  gastrointestinal irritation, including intense vomiting. Fatalities have also been reported in some cases.

Daffodil
Toxic to cats and dogs; the bulbs being the most toxic part.
Symptoms:  Vomiting, salvation, diarrhea; large ingestions cause convulsions, low blood pressure, tremors and cardiac arrhythmias

Gladiola
The corm (bulb) that is most toxic to dogs and cats. Symptoms:  Salivation, vomiting, drooling, lethargy, diarrhea.

Ivy 
Ivy foliage is more toxic than its berries.
Symptoms:  Vomiting, abdominal pain, hypersalivation, diarrhea.

Lilies
Members of the Lilium family are considered to be highly toxic to cats, even when very small portions are ingested. Many types of lily (Tiger, Asian, Japanese Show, Easter, Stargazer, Casa Blanca) can cause kidney failure in cats. Curiously, lilies are not toxic to dogs.
Symptoms:  Kidney failure.

Milkweed
Quite toxic to dogs and cats.
Symptoms:  Vomiting, profound depression, weakness, anorexia, and diarrhea are common; may be followed by seizures, difficulty breathing, rapid, weak pulse, dilated pupils, kidney or liver failure, coma, respiratory paralysis and death.

Morning Glory
Morning glory can cause hallucinations in cats and dogs. Symptoms:  Gastrointestinal upset, agitation, tremors, disorientation, ataxia, anorexia, hallucinations.

Oleander
All parts contain a highly toxic cardiac glycoside and can cause a number of problems.
Symptoms:  Colic, diarrhea (possibly bloody), sweating, incoordination, shallow/difficult breathing, muscle tremors, recumbency, and possibly death from cardiac failure.

Poinsettia
May cause discomfort.
Symptoms:  Irritating to the mouth and stomach, sometimes causing mild vomiting.

Pothos
Cats and dogs can both have adverse reactions to chewing or ingesting it.
Symptoms:  Oral irritation, intense burning and irritation of mouth, tongue and lips, excessive 

Sago Palm
They are apparently very tasty to animals, and unfortunately highly toxic–all parts are poisonous, but especially the seeds. 
Symptoms:  Vomiting, melena, icterus, increased thirst, hemorrhagic gastroenteritis, bruising, coagulopathy, liver damage, liver failure, death

Tomato Plant
Although tomato plants probably won’t prove lethal for your pet, they can provide a good dose of discomfort. for cats and dogs. 
Symptoms:  Hypersalivation, inappetence, severe gastrointestinal upset, diarrhea, drowsiness, CNS depression, confusion, behavioral change, weakness, dilated pupils, slow heart rate.

Tulip/Narcissus
It’s the bulb of the tulip and narcissus plants that have the highest concentration of toxins. Be cautious if you have a dog that digs. 
Symptoms:  Intense gastrointestinal irritation, drooling, loss of appetite, depression of the central nervous system, convulsions and cardiac abnormalities.

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