Yes, calla lilies are toxic to cats. The ASPCA lists calla lily (Zantedeschia aethiopica) as toxic, and chewing or biting any part of the plant can cause oral irritation, intense burning of the mouth and tongue, excessive drooling, vomiting, and difficulty swallowing. The good news: calla lilies are significantly less dangerous than “true lilies” like Easter lilies or stargazers, which can cause fatal kidney failure. Calla lily poisoning is painful and distressing, but symptoms typically resolve on their own.
How Calla Lilies Harm Cats
Calla lilies belong to the Araceae (arum) family and contain tiny, needle-shaped crystals of calcium oxalate packed inside specialized cells throughout the plant. When a cat chews on a leaf, stem, or flower, these microscopic crystals shoot out and physically embed themselves in the soft tissue of the mouth, tongue, and throat. Once lodged, the crystals trigger the release of histamine from surrounding cells, which causes swelling, inflammation, and a burning sensation.
The plant also contains oxalic acid and enzymes that break down protein, which intensify the irritation. This is why cats often react immediately: pawing at their face, drooling heavily, foaming at the mouth, vocalizing, and sometimes vomiting or having diarrhea. Swelling of the tongue and throat is possible, and in rare cases this can make breathing difficult, though that outcome is uncommon.
What Symptoms Look Like
Signs of calla lily ingestion tend to appear right away, often within seconds to minutes of chewing the plant. The most common signs include:
- Pawing at the face due to mouth pain
- Drooling or foaming from intense oral irritation
- Vocalizing or crying out
- Vomiting and diarrhea
- Difficulty swallowing
- Visible swelling of the lips, tongue, or mouth
Most cats stop chewing quickly because the burning sensation is so immediate and unpleasant. That self-limiting behavior means cats rarely ingest a large amount, which is part of why serious complications are rare.
What to Do if Your Cat Chews a Calla Lily
Start by gently cleaning your cat’s face with warm water to remove any plant material or residue. If your cat will accept it, offering a small amount of milk, yogurt, or another dairy product can help dissolve the calcium oxalate crystals and ease the burning sensation. This is one of the few situations where dairy is actually recommended for cats.
In most cases, the symptoms fade on their own as the irritation subsides. If your cat is drooling excessively for more than an hour, refusing to eat or drink, or showing any signs of labored breathing or significant facial swelling, a vet visit is warranted. Breathing difficulty from airway swelling is uncommon but is the one scenario where calla lily ingestion becomes an emergency.
Calla Lilies vs. True Lilies: A Critical Difference
This is the most important thing to understand. Despite sharing the word “lily,” calla lilies and true lilies are completely different plants with vastly different risks. Calla lilies cause local mouth and throat irritation. True lilies, those in the Lilium and Hemerocallis families, cause kidney failure and death.
True lilies include Easter lilies, stargazer lilies, Asiatic lilies, tiger lilies, and daylilies. Every part of these plants is toxic to cats: stems, leaves, flowers, pollen, even the water in the vase. A cat that licks a few pollen grains off its fur while grooming or drinks from a vase holding true lilies can develop fatal kidney failure within 72 hours. The U.S. Food and Drug Administration has specifically warned about this danger.
Early signs of true lily poisoning (vomiting, decreased appetite, lethargy) can look similar to calla lily irritation, which is why correct plant identification matters so much. With true lilies, those early symptoms may seem to improve after 12 hours, only for kidney damage to set in over the next one to three days. By that point, treatment becomes far more difficult. If there’s any chance your cat has been exposed to a true lily rather than a calla lily, treat it as a life-threatening emergency.
How to Tell Which Plant You Have
Calla lilies have a single, funnel-shaped petal (called a spathe) that wraps around a central spike, with broad, arrow-shaped leaves. They come in white, pink, yellow, and deep purple. True lilies look entirely different: they have multiple petals that flare open, prominent stamens covered in pollen, and long, narrow leaves arranged along a central stalk. Easter lilies are white with trumpet-shaped blooms, while stargazers and Asiatic lilies tend to be spotted or brightly colored.
Other plants with “lily” in the name fall into different risk categories. Peace lilies (Spathiphyllum) are in the same family as calla lilies and cause the same type of calcium oxalate irritation. Peruvian lilies cause mild stomach upset but no kidney damage. Lily of the valley contains cardiac toxins, making it dangerous in a completely different way. The safest approach is to check any plant with “lily” in its name against the ASPCA’s toxic plant database before bringing it into a home with cats.
Keeping Cats Safe Around Plants
Because cats are curious groomers who chew on leaves for texture or out of boredom, the most reliable prevention is simply not keeping toxic plants in your home. If you receive calla lilies in a bouquet, place them in a room your cat cannot access. Be especially vigilant during holidays like Easter and Mother’s Day, when true lilies are commonly included in flower arrangements and gift bouquets, sometimes without being clearly labeled.
If you want to keep houseplants and have cats, look for species the ASPCA lists as non-toxic: spider plants, Boston ferns, African violets, and certain palms are popular options that won’t cause harm if a curious cat takes a nibble.