Skip to main content

House plants poisonous to a cat

house plant poisonous to a cat
Should I eat by Mrs eNil

oleander house plant poisonous to a catBefore looking at house plants poisonous to a cat it might be useful to ask why an obligate carnivore wants to eat plants in the first place. There are probably several reasons. But we know that cats like to eat grass and grass is actually a green plant (monocotyledonous green plants). When she goes out into the garden, my cat always chews a piece of grass and occasionally goes for one of the flowering plants instead. It seems that she is treating the grass the same as the flowering plant.

The reasons why cats eat plants (including grass) has puzzled the experts. Some think or thought that it is a laxative to help the cat pass hairballs, for instance. Or that eating grass would induce cat vomiting and force the hairball up the other end! This was decided on the basis that cats were sometimes sick after eating grass. However the sickness may have been present before eating the grass. Other theories werePoinsettias house plant poisonous to a cat that eating grass added roughage or ameliorated throat inflammation.

When cats eat grass it is usually only a strand or two - very little which would tend to disprove the above theories. The most recent theory is that cats eat grass because it contains folic acid, a vitamin that has a role in the production of haemoglobin.

"Hemoglobin (also spelled haemoglobin and abbreviated Hb or Hgb) is the iron-containing oxygen-transport metalloprotein in the red blood cells of vertebrates....... Hemoglobin transports oxygen from the lungs or gills to the rest of the body, such as to the muscles, where it releases the oxygen for cell use." (src: Wikipedia published under GNU Free Documentation License, Version 1.2 or any later version - see Wikipedia licensing below).

A shortage of haemoglobin may result in feline anemia. Even full-time indoor cats can eat grass cultivated in a tray - you can buy one as a Christmas present...

The fact that cats eat plants in very small quantities does not mean that people who are vegetarians can convert their beloved cats to the Easter lily house plant poisonous to a catsame diet. Cats eat meat, need meat and become ill if they don't.

So cats eat grass but cannot or should not eat house plants poisonous to a cat which is more likely to happen for indoor cats. Such plants are:
  • Poinsettias (not that toxic apparently - cat will salivate - looks bad but not that bad)
  • Easter Lily may induce kidney failure.
  • Oleander - "(Nerium oleander), is an evergreen shrub or small tree in the dogbane family Apocynaceae" (src: Wikipedia published under GNU Free Documentation License, Version 1.2 or any later version - see Wikipedia licensing below) - this can cause cardiovascular problems
  • "Dieffenbachia is a genus of tropical plants in the Family Araceae noted for their patterned leaves. Members of this genus are popular as houseplants because of their tolerance to shade" - see picture below (src: Wikipedia published under GNU Free Documentation License, Version 1.2 or any later version - see Wikipedia licensing below) - can cause the tongue to swell and inflame the intestine wall.
  • this list is not comprehensive.

Dieffenbachia house plant poisonous to a cat

Update 3-12-08: We bring in plants at Christmas. Some can be poisonous. Watch out for these:

Holly (Ilex sp.). A plant often brought in at Christmas time, can cause severe vomiting and diarrhea plus mental health problems - depression

Amaryllis (Amaryllis spp). A cat ingesting this plant can result in vomiting, diarrhea, depression, lack of appetite, tremors, drooling and abdominal pain.

Mistletoe (Phoradendron spp.). This is another wellknown Christmas plant. If a cat eats it, it can also cause significant vomiting and diarrhea. In addition, this plant has been associated with difficulty in breathing, a slowed heart rate, collapse and it can cause death if a lot is eaten. Sometimes animals may show erratic behavior and hallucinations.

House plants poisonous to a cat - Source:


Wikipedia licenses: click on the link to see the terms of a Wikipedia license.

House plants poisonous to a cat -Photos of plants: published under Wikimedia creative commons license license = Attribution-ShareAlike License

Heading photo: published under creative commons license = Attribution-NonCommercial-NoDerivs License

House plants poisonous to a cat- Attributions:
  • Poinsettias - by AndrĂ© Karwath aka Aka
  • Easter Lily - by Solipsist
  • Dieffenbachia - selbst fotografiert
  • Oleander - by Alvesgaspar
From House plants poisonous to a cat to cat health problems


Mia K said…
This is list of 24 common plants poisonous to pets :

Aloe vera

Symptoms: Vomiting, depression, diarrhea, anorexia, tremors, change in urine color.


Symptoms: Vomiting, depression, diarrhea, abdominal pain, hypersalivation, anorexia, tremors.


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

Symptoms: Vomiting, diarrhea.


Symptoms: Oral irritation, intense burning and irritation of mouth, tongue, and lips; excessive drooling; vomiting; difficulty swallowing.


Symptoms: Mild gastrointestinal signs, mild dermatitis.

Castor bean

Symptoms: Abdominal pain, drooling, vomiting, diarrhea, excessive thirst, weakness, and loss of appetite. Severe cases of poisoning can result in dehydration, muscle twitching, tremors, seizures, coma, and death.


Symptoms: Vomiting, diarrhea, hypersalivation, dermatitis.


Symptoms: Gastrointestinal irritation, including intense vomiting. Fatalities have also been reported.


Symptoms: Vomiting, salvation, diarrhea; large ingestions cause convulsions, low blood pressure, tremors, and cardiac arrhythmias.


Symptoms: Salivation, vomiting, drooling, lethargy, diarrhea.

Symptoms: Vomiting, diarrhea, depression.

Ivy (California Ivy, Branching Ivy, Glacier Ivy, Needlepoint Ivy, Sweetheart Ivy, English Ivy)

Symptoms: Vomiting, abdominal pain, hypersalivation, diarrhea.

Symptoms: Kidney failure.


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
Symptoms: Gastrointestinal upset, agitation, tremors, disorientation, ataxia, anorexia, hallucinations.

Symptoms: Colic, diarrhea (possibly bloody), sweating, lack of coordination, shallow/difficult breathing, muscle tremors, recumbency, and possibly death from cardiac failure.

Symptoms: Irritating to the mouth and stomach, sometimes causing mild vomiting.

Symptoms: Oral irritation, intense burning and irritation of mouth, tongue, and lips; excessive drooling; vomiting; difficulty swallowing.

Sago palm
Symptoms: Vomiting, melena, jaundice, increased thirst, hemorrhagic gastroenteritis, bruising, coagulopathy, liver damage, liver failure, death.

Tomato plant
Symptoms: Hypersalivation, inappetence, severe gastrointestinal upset, diarrhea, drowsiness, depression of the central nervous system, confusion, behavioral change, weakness, dilated pupils, slow heart rate.

Symptoms: Intense gastrointestinal irritation, drooling, loss of appetite, depression of the central nervous system, convulsions, and cardiac abnormalities.

The bark and leaves of this very popular evergreen provided the basis for the cancer-treatment drug, paclitaxel -- but general ingestion of any part of the tree (except the flesh of the berry) can be very dangerous to animals. Horses have an especially low tolerance to yew.

Source :
Michael said…
Thanks for the list. Really nice contribution.

Popular posts from this blog

Cat Ear Mites

Brown gunge. Yes, I know this is a ferret! It does show the build up of dark brown to black ear wax caused by the presence of the cat ear mites in the outer ear canal. This parasite is not restricted to the domestic cat, which makes this photo valid and a useful illustration (I was unable to find a suitable photo of a cat with the condition). Photo Stacy Lynn Baum under a creative commons license. Ear mites (minute crab like creatures) are one of the causes of inflammation of the outer ear canal (scientific term for this inflammation is Otitis externa ). The outer ear canal is the tube that runs from outside to the ear drum (the pathway for the reception of sound), which can be seen when looking at the ear. Otitis externa affects humans and often swimmers as it is called "swimmer's ear" in humans. This YouTube video show ear mites under a microscope. They are not actually in the ear in this video. There are many possible causes of Otitis externa in c

Feline Mange

I'll write about three types of feline mange (a) feline scabies or head mange (b) demodectic mange and (c) sarcoptic mange. The source material is from Cat Owner's Home Veterinary Handbook - the best on the market . Generalised feline mange? Puerto Rico - Photo by Gotham City Lost And Found Feline Scabies - head mange Head mange or feline scabies, is a fairly rare condition in cats, which is caused by the Notoedres mite (head mite) that only reproduces on cats. The female mites burrow a few millimeters (that is a lot) into the skin around the head, and neck to lay eggs, which hatch and lay their own eggs. Their presence and activities causes intense itching that in turn causes the cat to scratch. The scratching will obviously be noticed and it will cause the skin to become red, scratched and worse infected. Symptoms: hair loss and scabs, thick wrinkled skin and grey/yellow crusts form plus the symptoms of scratching. Feline mange (head mange) is contagious and tr

Cat Anatomy

Cat Anatomy - Photo by Curious Expeditions . The picture above was taken at Wax Anatomical Models at La Specola in Florence, Italy. The photograph is published under a creative commons license kindly granted by the photographer. I am sorry if it is a bit gruesome. It is pretty well all I could find as an illustration that was licensed for publication. Cat Anatomy is a very wide ranging subject. The anatomy of a cat is very similar to human anatomy. If you were writing a biology book for students of biology you would go through every part of the a cat's anatomy in some detail. It would be similar to writing a book about the human anatomy. It would be a thick book and pretty boring for your average internet surfer. So, how do you limit such a big subject and make this post meaningful? The answer I think lies in doing two things: Having a quick general look at cat anatomy - an overview and; Focusing on the areas of cat anatomy that are particular to the cat and of parti