Are Hydrangeas Poisonous To Cats?

A common question we get asked is “Are Hydrangeas Poisonous To Cats?” The quick answer is no, hydrangeas are not poisonous to cats.

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There are a lot of plants out there that are poisonous to cats if they eat them. Hydrangeas are one of those plants. All parts of the hydrant are poisonous to cats, including the flower, leaves, and stems. If your cat eats any part of a hydrant, they may experience vomiting, diarrhea, excessive drooling, weakness, and difficulty breathing. In severe cases, it can lead to organ damage and even death. If you suspect your cat has eaten a hydrant, call your vet immediately.

What are Hydrangeas?

Hydrangeas are flowering shrubs that are part of the genus Hydrangea. There are about 75 species of Hydrangea, and they are native to Asia and the Americas. Hydrangeas can be found in a variety of colors, including white, pink, purple, and blue. The flower heads are large and showy, and the blooms are often used in floral arrangements.

While hydrangeas are not poisonous to cats, they can cause stomach upset if ingested in large quantities. If you have a cat that likes to nibble on plants, it is best to keep hydrateas out of reach.

Are Hydrangeas Poisonous to Cats?

Hydrangeas (Hydrangea spp.) are lovely flowering shrubs that provide colorful blooms in spring and summer. They’re a favorite of home gardeners because they’re relatively easy to grow and don’t require a lot of care. While hydran

Symptoms of Hydrangea Poisoning in Cats

If you think your cat has ingested any part of a hydrangea, it is very important to seek professional veterinary care immediately. Clinical signs of hydrangea poisoning typically occur within 6 to 12 hours after ingestion and can include:

-Loss of appetite

Treatment for Hydrangea Poisoning in Cats

While most plants are safe for cats, there are a few that can cause problems if ingested. Hydrangeas (Hydrangea spp.) are one of those plants. All parts of the plant contain substances that can cause stomach upset and, in large enough quantities, may lead to more serious problems such as difficulty breathing or heart arrhythmia.

If you think your cat has eaten any part of a hydrangea, it’s important to seek veterinary care as soon as possible. Treatment for hydrangea poisoning in cats will be based on the severity of the symptoms and how much of the plant your cat has eaten. In mild cases, your veterinarian may recommend giving your cat a injections or fluids to help flush the toxins from its system. More severe cases may require hospitalization for intensive supportive care.

Prevention of Hydrangea Poisoning in Cats

The ASPCA Animal Poison Control Center (APCC) advises pet parents to take extra care to prevent their cats from coming into contact with hydrangeas. All parts of the plant—including the flowers, leaves and stems—contain cyanogenic glycosides, which can produce cyanide gas when metabolized by cats. Cyanide gas inhibits oxygen uptake in the blood and can cause serious respiratory problems. If you suspect your cat has ingested any part of a hydrangea, call your veterinarian or the APCC at (888) 426-4435 immediately.


While the hydrangea plant is not poisonous to cats, the flower heads can cause stomach upset if ingested. If you have a cat that likes to nibble on flowers, it’s best to keep them away from hydrangeas.


Hydrangeas are not poisonous to cats. However, the plant does contain a small amount of cyanide, which can be toxic if consumed in large quantities. If your cat ingests a large amount of hydranthe leaves or flowers, it may experience vomiting, diarrhea, and depression. If you suspect your cat has eaten a large quantity of hydranthe plant, please contact your veterinarian immediately.


If you’re a cat lover, you’ve probably wondered at some point if hydrangeas are poisonous to cats. After all, many beautiful flowers are toxic to our furry friends.

The good news is that hydrangeas are not poisonous to cats. In fact, they’re not poisonous to any animals, according to the ASPCA. That means you can feel safe planting these lovely flowers in your garden without worrying about your kitty getting sick.

Of course, that doesn’t mean your cat will necessarily enjoy eating hydrangeas. Some cats may be attracted to the plant’s leaves or flowers and decide to take a nibble, only to find that they don’t taste very good. If your cat eats a small amount of hydrangea, he may experience stomach upset, vomiting or diarrhea. If you think your cat has eaten a harmful amount of any plant, it’s always best to err on the side of caution and contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 for guidance.

About the Author

Martin is a freelance writer and author of The Complete Hydrangea Care Guide. He has over fifteen years experience growing and caring for a variety of plants, both in his own garden and in others’ gardens. He is passionate about plant care and enjoys sharing his knowledge with others.

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