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Is Hydrangea toxic to cats?

YES (TOXIC)
Unfortunately, Hydrangea 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.
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Additional Names:Hortensia, Hills of Snow, Seven Bark
Scientific Name:Hydrangea arborescens
Family:Hydrangeaceae
Toxic Principles:Cyanogenic glycoside
Clinical Signs:Vomiting, depression, diarrhea. Cyanide intoxication is rare - usually produces more of a gastrointestinal disturbance.
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 Hydrangea Toxic to Cats?

If you're a pet owner, it's normal to be concerned about the types of plants or flowers that you have in and around your home. After all, cats are notorious for their curious nature and their tendency to nibble on anything that catches their fancy. Hydrangeas are a popular ornamental plant, and if you're wondering whether it's safe to keep them around your feline friends, this article is for you.

What is a Hydrangea?

Hydrangeas are large, showy flowers that grow in clusters. These flowers are commonly found in gardens, parks, and other outdoor spaces. They come in a range of colors, including pink, blue, white, and purple, and are a popular choice for floral arrangements and wedding decorations. Hydrangeas are native to Asia and the Americas and are hardy, long-lived plants.

Are Hydrangeas Toxic to Cats?

Yes, hydrangeas are toxic to cats. All parts of the hydrangea plant contain a chemical known as cyanogenic glycoside, which can cause toxicity in cats and other animals. When cats ingest any part of the hydrangea plant, they may experience vomiting, diarrhea, lethargy, loss of appetite, and abdominal pain. And in severe cases, cats might even experience respiratory failure, seizures, and heart problems.

What Should You Do If Your Cat Eats Hydrangeas?

If you suspect that your cat has eaten any part of the hydrangea plant, you should contact your veterinarian immediately. The sooner you seek treatment, the better the chances of a positive outcome. Your veterinarian may induce vomiting to remove the plant material from your cat's stomach, or they may administer activated charcoal to absorb any toxins that might be present in their system. In some cases, your cat may require hospitalization to receive intravenous fluids and other treatments to manage their symptoms.

What Are Some Hydrangea Alternatives for Your Home?

If you're looking for a safe alternative to hydrangeas that will add natural beauty to your home, there are plenty of options to choose from. Here are a few cat-friendly plants that you can consider:

  • Spider Plant
  • Boston Fern
  • Bamboo
  • African Violet
  • Rose

These plants are non-toxic to cats and will add a touch of greenery and color to your living space without putting your feline friends in danger.

Conclusion

It's vital to be aware of the plants and flowers that are toxic to our pets, especially if you have a curious cat in your home. Hydrangeas are lovely flowers that are toxic to cats, and if you have these plants in your home, it's essential to keep them in an area where your cats can't reach them. If you love having flowers in your home, there are plenty of cat-friendly options available, so don't hesitate to explore. And remember, if you suspect that your cat has eaten any part of the hydrangea plant, seek veterinary care right away to ensure their safety and well-being.

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