toxic cat plants logo
Toxic Cat Plants
A fast and free database to keep your cat safe

Is Castor Bean Plant toxic to cats?

YES (TOXIC)
Unfortunately, Castor Bean Plant is toxic and potentially harmful to cats. We recommend you keep your feline friends away from this plant. See the table below for more information.
Search Again
Additional Names:Castor Oil Plant, Mole Bean Plant, African Wonder Tree, Castor Bean
Scientific Name:Ricinus communis
Family:Euphorbiaceae
Toxic Principles:Ricin
Clinical Signs:Beans are very toxic: oral irritation, burning of mouth and throat, increase in thirst, vomiting, diarrhea, kidney failure, convulsions. Access to ornamental plants or pruned foliage most common in poisonings. Ricin is a highly toxic component that inhibits protein synthesis; ingestion of as little as one ounce of seeds can be lethal. Signs typically develop 12 to 48 hours after ingestion, and include loss of appetite, excessive thirst, weakness, colic, trembling, sweating, loss of coordination, difficulty breathing, progressive central nervous system depression, and fever. As syndrome progresses, bloody diarrhea may occur, and convulsions and coma can precede death.
If you think your cat may have ingested a poisonous substance, call 888 426 4435 or your local vet
Detailed Write-up
Author:
Alec
Last Updated:
7/13/25

Is Castor Bean Plant Toxic to Cats?

Cats are curious creatures that like to explore the world around them. However, sometimes their curiosity can get them into trouble. As a cat owner, it’s important to be aware of the potential dangers your feline friend may encounter. One of the hazards you need to watch out for is the castor bean plant. Here’s what you need to know about this plant and its toxic effects on cats.

What is the Castor Bean Plant?

The castor bean plant, also known as Ricinus communis, is a species of flowering plant that belongs to the spurge family. It is native to Africa, but it is now grown in many parts of the world as an ornamental plant. The plant has large, glossy leaves and produces spiky fruit capsules that contain seeds. These seeds are used to make castor oil, which has medicinal and industrial applications.

What Makes the Castor Bean Plant Toxic to Cats?

The castor bean plant contains a toxic protein called ricin, which is present in all parts of the plant, including the seeds, leaves, and stems. Ricin is a potent inhibitor of protein synthesis and can cause cell death. Ingestion of even a small amount of the plant or its seeds can be fatal to cats.

What Are the Symptoms of Castor Bean Plant Poisoning in Cats?

When a cat ingests any part of the castor bean plant, it can cause a range of symptoms that can vary depending on the amount of ricin ingested and the cat’s size, age, and health. Here are some of the signs and symptoms to watch out for:

  • Vomiting
  • Diarrhea
  • Loss of appetite
  • Abdominal pain
  • Dehydration
  • Tremors
  • Seizures
  • Difficulty breathing
  • Weakness
  • Coma

If you suspect that your cat has ingested any part of the castor bean plant, it is important to seek immediate veterinary care. Ricin acts quickly, and without prompt treatment, the outcome can be fatal.

How Can You Prevent Castor Bean Plant Poisoning in Cats?

The best way to prevent castor bean plant poisoning in cats is to keep the plant out of their reach. If you have a castor bean plant in your yard or home, make sure it is fenced off or kept in a room that your cat cannot access. It’s also a good idea to educate yourself and your family members about the dangers of this plant and to teach your cat not to eat anything that is not food.

If you notice any signs of castor bean plant poisoning, do not wait for the symptoms to worsen. Take your cat to the vet immediately. The vet may induce vomiting to remove any plant material from your cat’s stomach and provide supportive care such as IV fluids and medications to manage the symptoms.

Conclusion

The castor bean plant is highly toxic to cats and can cause severe illness or death. It is important to keep this plant out of your cat’s reach and to seek immediate veterinary care if you suspect that your cat has ingested any part of it. Remember, prevention is always better than cure, so take the necessary precautions to keep your furry friend safe and healthy.

Search Again