24 Poisonous Plants and the Symptoms They Cause

Vet Tech Tips All Animal Tips Advise Toxic Plant Eating

This is a list of some plants that may cause issues for cats and dogs if ingested.

1. Amaryllis

2. Autumn Crocus

3. Azalea and Rhododendron

4. Castor Bean

5. Christmas Cactus

6. Christmas Tree Preservatives

7. Chrysanthemum

8. Cyclamen

9. English Ivy

10. Ginkgo Biloba

11. Holly

12. Kalanchoe

13. Lilies

14. Mums

15. Oleander

16. Peace Lilies (Mauna Loa Peace Lily)

17. Poinsettia

18. Pothos

19. Sago Palm

20. Schefflera and Brassaia Actinophylla

21. Tulip Bulbs

22. Yew

Many common plants found in our homes or yards can be toxic or poisonous to our cats and/or dogs. If your pet chews, rubs against or ingests any part of these plants, it is crucial to remove the plant after seeking veterinary care for your pet. While some plants may only cause mild stomach upset, others can lead to severe neurological issues. When visiting the vet, ensure you know the name of the plant ingested or bring a picture to help the veterinary team identify the symptoms your pet may develop and the necessary treatments.

These plants often affect both dogs and cats similarly, and some are even toxic to horses. This article will focus on symptoms and what is poisonous for dogs and cats.


Vet Tech Tips All Animal Tips Advise Amaryllis
Vet Tech Tips Amaryllis

Popular around Easter, these plants can cause vomiting, depression, diarrhea, abdominal pain, excessive drooling, loss of appetite, and tremors.

Autumn Crocus

Ingestion may lead to oral irritation, bloody vomit, diarrhea, shock, multi-organ damage, and bone marrow suppression.

Azalea and Rhododendron

These can cause vomiting, drooling, diarrhea, weakness, and central nervous system depression. Severe poisoning might result in coma and death.

Castor Bean

Vet Tech Tips All Animal Tips Advise Castor Bean
Vet Tech Tips Castor Bean

Symptoms include severe abdominal pain, drooling, vomiting, diarrhea, excessive thirst, weakness, and loss of appetite. With severe cases leading to dehydration, muscle twitching, tremors, seizures, coma, and death.

Christmas Cactus

Dogs may experience vomiting (with or without blood), diarrhea (with or without blood), loss of appetite, and depression. Cats may exhibit ataxia or loss of coordination.

Christmas Tree Preservatives

These may contain fertilizers that can cause vomiting and diarrhea.


Vet Tech Tips All Animal Tips Advise Chrysanthemum
Vet Tech Tips Chrysanthemum

Ingestion can lead to gastrointestinal upset, drooling, vomiting, and diarrhea, with potential depression or loss of coordination in severe cases.


The most poisonous part, the root, can cause gastrointestinal irritation, vomiting, and potentially death.\

English Ivy

May cause vomiting, abdominal pain, excessive drooling, and diarrhea.

Ginkgo Biloba

Vet Tech Tips All Animal Tips Advise Ginkgo Biloba
Vet Tech Tips Ginkgo Biloba

Seeds from female trees can cause vomiting, irritability, and seizures. Contact with seeds may also cause an unpleasant odor if your pet rolls in it.


Symptoms include vomiting, diarrhea, loss of appetite, lip-smacking, head shaking, and potential mouth injuries from the leaves.


Can cause gastrointestinal irritation and toxic cardiac effects, potentially disturbing cardiac rhythm and rate.


Ingesting even a small amount can cause severe kidney damage.


This popular fall flower can lead to vomiting, diarrhea, excessive drooling, incoordination, and dermatitis.


Can result in gastrointestinal irritation, abnormal heart function, low body temperature, and death.

Peace Lilies (Mauna Loa Peace Lily)

Vet Tech Tips All Animal Tips Advise Peace Lily
Vet Tech Tips Peace Lily

Can cause oral irritation, excessive drooling, vomiting, difficulty swallowing, and intense burning and irritation of the mouth, lips, and tongue.


The sap can cause gastrointestinal irritation, including vomiting and diarrhea.


Chewing or ingestion can lead to oral tissue and gastrointestinal tract swelling and irritation.

Sago Palm

All parts are toxic, but the seeds are the most dangerous. Ingesting just one or two seeds can cause vomiting, diarrhea, depression, seizures, and liver failure.

Schefflera and Brassaia Actinophylla

Vet Tech Tips All Animal Tips Advise Schefflera
Vet Tech Tips Schefflera

Ingestion can result in oral irritation, excessive drooling, vomiting, difficulty swallowing, and intense burning and irritation of the mouth, lips, and tongue.

Tulip Bulbs

These can cause excessive drooling, loss of appetite, seizures, and cardiac abnormalities.


Ingestion can lead to central nervous system issues, including trembling, coordination problems, and difficulty breathing.

This list does not cover all toxic plants for dogs and cats but highlights the most common ones known to cause issues.

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