Is Calla Lily Toxic to Cats and Dogs?
The calla lily is toxic to both cats and dogs. This popular plant, known by other names such as arum lily, trumpet lily, and garden calla, can cause a painful reaction if a pet chews on or ingests any part of it.
The toxicity is not caused by a poison that is absorbed into the bloodstream, but by a physical irritant. All parts of the calla lily contain microscopic, sharp crystals that can cause immediate discomfort to the mouth and digestive tract.
Calla Lily: what the ASPCA database lists
| ASPCA entry | Calla Lily |
|---|---|
| Other common names | Calla Lily, Pig Lily, White Arum, Trumpet Lily, Florist’s Calla, Garden Calla, Arum Lily |
| Scientific name | Zantedeschia aethiopica |
| Family | Araceae |
| Toxic to | Toxic to Dogs, Toxic to Cats |
| Non-toxic to | None listed |
| Toxic principles | Insoluble calcium oxalates |
| Clinical signs listed | Oral irritation, intense burning and irritation of mouth, tongue and lips, excessive drooling, vomiting, difficulty swallowing |
What the ASPCA says about calla lily
The American Society for the Prevention of Cruelty to Animals (ASPCA) lists the calla lily, or Zantedeschia aethiopica, as toxic to both cats and dogs. This plant belongs to the Araceae family, which includes many other popular houseplants known for containing similar irritants.
The toxic principle identified by the ASPCA is insoluble calcium oxalates. These are crystal-like structures within the plant’s cells. When a pet bites or chews the leaves, stem, or flower, these sharp crystals are released. They physically embed themselves into the soft tissues of the mouth, tongue, lips, and throat, causing pain and inflammation on contact.
The clinical signs listed by the ASPCA are a direct result of this mechanical irritation. They include:
- Oral irritation
- Intense burning of the mouth, tongue, and lips
- Excessive drooling
- Vomiting
- Difficulty swallowing
What this means in a home with pets
Having a calla lily in a home with cats or dogs requires careful management due to the immediate and painful effects it can cause. Unlike some toxins that require a large amount to be ingested, even a small nibble or a curious chew can release the sharp calcium oxalate crystals and cause significant discomfort. The reaction is typically swift, as the pain begins as soon as the plant is chewed.
Cats, who may be drawn to batting at or chewing on leaves, are particularly at risk. Dogs, especially puppies, might chew on the plant out of boredom or curiosity. Because the irritation is so intense, most pets will stop chewing quickly. The resulting oral pain can be distressing for the animal.
Keeping pets and this plant apart
The safest approach for a pet household is to not keep calla lilies. If you choose to have them, they must be kept completely out of your pet’s reach at all times. For cat owners, this can be challenging due to their climbing ability. Placing the plant on a high shelf or in a room that pets cannot access are potential strategies. Be mindful of fallen leaves or petals, as these still contain the irritant crystals and can be found and chewed on by a pet.
Supervision is key when pets are in the same area as the plant. For outdoor garden callas, ensure pets are monitored when they are in the yard to prevent them from chewing on the foliage. Always read ingredient labels on any plant food or soil additives to ensure they are pet-safe. If you are ever unsure about a plant’s identity, it is best to assume it is toxic and keep it away from your animals.
When to call your vet
If your pet chewed or ate part of this plant, call your veterinarian or an animal poison control line. Note which plant and which part, how much may be gone and when, and take a photo or a piece of the plant with you.
If you suspect your cat or dog has chewed on a calla lily, call your veterinarian or the ASPCA Animal Poison Control Center immediately for guidance. Note when your pet was exposed to the plant and what parts they may have eaten. If possible, bring the plant or a photo of it with you to the veterinary clinic.
Emergency signs: go now
- Collapse, fainting or severe weakness
- Seizures, tremors or trouble standing
- Trouble breathing or blue, gray or very pale gums
- Repeated vomiting or retching, or a swollen, painful belly
- Any known contact with a substance listed as toxic, even before signs appear
Book an appointment soon
- Vomiting or diarrhea that lasts or keeps coming back
- Not eating or drinking, or drinking much more than usual
- Drooling, pawing at the mouth or a swollen face
- Lethargy, hiding or acting unlike themselves
ASPCA Animal Poison Control Center: (888) 426-4435 (a consultation fee may apply). Your own vet or nearest emergency clinic is always a good first call.
Sources
Last checked October 21, 2026. Listings and guidance can change; your veterinarian knows your pet’s health history.