Why?
Lily of the valley (Convallaria majalis) contains cardiac glycosides, substances that act directly on the heart. In cats they can cause vomiting, diarrhea, a slow or irregular heartbeat, a drop in blood pressure and, in severe cases, seizures. Every part of the plant is toxic, including the flowers, leaves, red berries and roots, and the vase water is considered dangerous too.
How much?
No amount is safe. Keep it out of your home, and if you receive some, put it in a room your cat never enters and dispose of the vase water out of reach.
The risks
- Heart rhythm problems, which can be fatal
- Vomiting and diarrhea
- Weakness and low blood pressure
- Disorientation or seizures in severe cases
Your cat ate some: what now?
Call your vet or an animal poison control center immediately, without waiting for symptoms, even if your cat only chewed a leaf or drank vase water. Bring the plant or a photo, and don't try to make your cat vomit.
Better options
For spring bouquets, choose flowers considered non-toxic to cats, like roses or orchids. A pot of cat grass gives your cat something green to chew safely.
Common questions
Is lily of the valley a true lily?
No. Despite the name, it isn't a true lily and doesn't cause kidney failure; it affects the heart instead. It's still an emergency, so treat any nibble seriously.
Is lily of the valley vase water toxic to cats?
It's considered toxic as a precaution, since compounds from the plant can leach into the water. If your cat drank some, call your vet right away.
This information is general and does not replace advice from a veterinarian. If your cat has swallowed something toxic, call your vet or an animal poison control center right away, without waiting for symptoms.