Get rid of rats from your house with plants: A natural and ecological solution

4. Castor oil (Ricinus communis): A powerful and versatile solution

4.1 History and toxicity

Castor oil plant is a tropical plant native to East Africa and now cultivated in gardens around the world. Its seeds contain a toxin called ricin, which is extremely dangerous to rodents (and humans if ingested). Although this toxicity must be managed carefully, it is an excellent rat deterrent.

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