Is Hydrangea toxic to dogs and cats?
How serious is Hydrangea for pets?
All parts contain cyanogenic glycosides that can release small amounts of cyanide when chewed, causing vomiting, diarrhea, and depression. Severe cyanide signs (gasping, collapse, seizures) are rare in dogs and cats since it takes a large quantity of plant material to reach a dangerous dose.
Hydrangea macrophylla
Also called: Bigleaf Hydrangea.
What to do if your pet chewed it
- Move the plant out of reach so they cannot take another bite.
- If your pet is alert, gently rinse their mouth and offer a little water.
- Call your vet or ASPCA Animal Poison Control at 888-426-4435, especially if you see drooling, vomiting, swelling, or lethargy.
Pet-safe swaps
The same green look without the toxicity worry. Each of these is non-toxic to both dogs and cats in our data.
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Buy Apollo a treatQuick answers about Hydrangea
Is Hydrangea toxic to cats?
Yes, Hydrangea is toxic to cats. See all 127 plants toxic to cats.
Is Hydrangea toxic to dogs?
Yes, Hydrangea is toxic to dogs. See all 124 plants toxic to dogs.
What is Hydrangea also called?
Hydrangea (Hydrangea macrophylla) is also called Bigleaf Hydrangea.
More plant lists
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Scan your plantAlways confirm with a veterinarian or ASPCA Animal Poison Control (888-426-4435) before assuming safety. This is a household reference, not a substitute for professional guidance in a suspected poisoning.
· Source: ASPCA Animal Poison Control classifications, plus named veterinary sources where ASPCA has no entry.
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