Yes, aglaonema (commonly called Chinese evergreen) is toxic to cats. The ASPCA lists it as toxic to cats, dogs, and horses. The good news: it causes painful but usually temporary irritation rather than life-threatening organ damage, and most cats recover fully, often without veterinary intervention.
Why Aglaonema Is Harmful to Cats
Every part of the aglaonema plant contains tiny, needle-shaped crystals called insoluble calcium oxalates. These crystals sit inside specialized cells throughout the leaves, stems, and roots. When a cat chews or bites into the plant, the cells rupture and shoot the microscopic needles into the soft tissue of the mouth and throat. The plant also contains enzymes that worsen the irritation once the crystals penetrate tissue.
Unlike some truly dangerous houseplants that cause organ failure, aglaonema’s damage is mostly mechanical and localized. The crystals physically pierce and inflame the lining of the mouth, tongue, and throat. This makes it intensely unpleasant for the cat, which is actually somewhat protective: most cats stop chewing quickly because the pain is immediate.
Symptoms to Watch For
Signs typically appear within minutes of chewing on the plant. The most common symptoms, as listed by the ASPCA, include:
- Oral irritation and pain: your cat may paw at its mouth or face
- Swelling of the mouth, tongue, and lips
- Excessive drooling
- Vomiting
- Difficulty swallowing
In rare cases, swelling can extend to the throat and airway. If your cat is gagging, making unusual breathing sounds, or seems to be struggling to breathe, that signals a more serious reaction that needs immediate veterinary attention.
What to Do If Your Cat Eats It
Start by gently removing any remaining plant material from your cat’s mouth if you can do so safely. Wiping or rinsing the mouth helps clear lingering crystals from the tissue. Some veterinary sources recommend offering a small amount of milk or another calcium-containing dairy product. The calcium in dairy binds to the oxalate crystals, helping neutralize them as they pass through the mouth and throat.
Most cases resolve on their own as the irritation subsides over several hours. However, if your cat is drooling heavily, refusing to eat or drink, vomiting repeatedly, or showing any sign of breathing difficulty, a vet visit is warranted. A veterinarian can manage pain, reduce swelling, and ensure the airway stays clear. The Merck Veterinary Manual notes that the prognosis for insoluble oxalate plant exposure is “good to excellent,” with full recovery expected in the vast majority of cases.
All Parts of the Plant Are Toxic
There’s no safe part of the aglaonema for your cat to chew on. The calcium oxalate crystals are distributed throughout the entire plant, from the roots to the leaf tips. There’s also no established “safe dose.” Because the irritation is so immediate and painful, cats rarely consume large quantities, but the amount needed to cause symptoms is small. Even a single bite can trigger drooling and mouth pain.
Cat-Safe Alternatives With a Similar Look
If you love aglaonema’s lush, patterned foliage but want a safer option, several non-toxic houseplants offer a similar aesthetic. Calathea and maranta (both commonly called prayer plants) have the same bold leaf patterns and thrive in similar low-to-medium light conditions. The cast iron plant tolerates low light and neglect even better than aglaonema, making it a durable swap. For something more compact, the baby rubber plant (Peperomia obtusifolia) has thick, glossy leaves and stays small enough for shelves and tabletops. All of these are listed as non-toxic to cats by the ASPCA.
If you decide to keep your aglaonema, place it somewhere your cat genuinely cannot reach. High shelves, closed rooms, or hanging planters are your best options. Cats are creative climbers, so a table or windowsill is rarely out of reach for long.