Are Hydrangeas Poisonous to Cats?

Hydrangeas are a major pet danger.
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Although hydrangeas are, indeed, lovely flowering plants, the effect it has on cats is quite the opposite. Unless you're 100 percent sure that a plant is cat-friendly, keep curious Fluffy far away from it. Always consult an experienced veterinarian regarding the health and treatment of your pet.

About Hydrangeas

Hydrangeas, which originated in North America, South America and eastern Asia, are a staple in many gardens, with their attractive foliage and showy blooms. They appear in small and large sizes, and often are used for shrub borders or as specimen plants. Hydrangeas are diverse and exist in a vast array of different colors, including violet, pink, blue, red and white.

Poisonous to Cats?

Hydrangeas are, indeed, poisonous to cats. The poisonous elements of the plants are its cyanogenic glycosides, which are metabolites that exist in various plants. Hydrangeas aren't just toxic to cats, but also to a variety of other animals including horses and dogs. Keep hydrangeas far away from all of your pets. Consumption of the plant can trigger some unpleasant and dangerous consequences.


If your cutie ate any part of a hydrangea, she may display noticeable signs of plant toxicity. Some symptoms of hydrangea poisoning are diarrhea, exhaustion, depression and vomiting. All areas of the plant are potentially hazardous, although the flowers and leaves have elevated amounts of cyanogenic glycosides, so take note. Get immediate veterinary assistance for your cat if she ate any section of a hydrangea, even if you do not notice any signs of poisoning. Act quickly and do not hesitate for even a second. Your pet's health is counting on you, after all.

Other Dangerous Plants

Many seemingly innocuous plants actually are very harmful to pets. If you have a garden that your cat can access, make sure that you are fully aware of the safety of each and every single plant. Consult your veterinarian if you have any questions regarding specific plants you possess. Apart from hydrangeas, other poisonous plants include begonias, azaleas, chandelier plants, English hollies, orange day lilies, wisteria, yellow oleander, trumpet lilies, poinsettias, nightshade and carnations.

Always check with your veterinarian before changing your pet’s diet, medication, or physical activity routines. This information is not a substitute for a vet’s opinion.

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