Are Hydrangeas Flowers Poisonous to Cats?


Yes, hydrangeas can be toxic to cats so you should not have these flowering plants in the same space as where your cat likes to dwell. The leaves, flowers, and buds of the hydrangeas plant contains a chemical called amygdalin, which can produce cyanide once it’s metabolized by the body.

Your cat must eat a certain amount of the hydrangeas plant in order for the signs of poisoning to develop. Cats that are affected by hydrangeas poisoning may display symptoms like vomiting and diarrhea. In more severe cases, you may notice signs and symptoms such as depression and lethargy.

The good news is that it’s uncommon for cats to eat an amount of hydrangeas that can lead to poisoning. That said, you should take the safe than sorry approach and make sure you don’t have plants in the house that could be toxic to your feline pal. If you think your cat is affected by hydrangeas poisoning then please contact the vet immediately.

Disclaimer: The content on is for informational purpose only. It is not intended to be a substitute for professional veterinarian advice, diagnosis, or treatment. Always seek the advice of your veterinarian when in doubt.

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