English Pennyroyal

I'd like to plant English pennyroyal in my dog pen. Is it safe? 

- Vera

Dear Vera,

English pennyroyal—also known by the botanical name Mentha pulegium—contains pulegone, a substance that can indeed be harmful to pets. If enough is ingested, gastrointestinal irritation— including vomiting and diarrhea can occur—and in severe cases, profound weakness of the limbs and liver damage may also result. We advise pet parents against allowing pets to nibble on the plant or using concentrated pennyroyal oil on pets.

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