Is Boston Fern Toxic to Cats and Dogs?
The Boston Fern, known scientifically as Nephrolepis exalta bostoniensis, is considered non-toxic to cats and dogs. The American Society for the Prevention of Cruelty to Animals (ASPCA) includes it on its list of safe plants for these pets.
This means that if a cat or dog chews on or ingests a small part of the plant, it is not expected to cause poisoning. However, any plant material can potentially lead to mild digestive upset, so it is still wise to discourage pets from eating houseplants.
Boston Fern: what the ASPCA database lists
| ASPCA entry | Boston Fern |
|---|---|
| Other common names | None listed |
| Scientific name | Nephrolepis exalta bostoniensis |
| Family | Dryopteridaceae |
| Toxic to | None listed |
| Non-toxic to | Non-Toxic to Dogs, Non-Toxic to Cats |
| Toxic principles | None listed |
| Clinical signs listed | None listed |
What the ASPCA says about Boston Fern
The ASPCA is a primary resource for pet poison control and plant toxicity information. Its database clearly states that the Boston Fern is non-toxic to both dogs and cats. The plant belongs to the Dryopteridaceae family.
Unlike many other popular houseplants, the Boston Fern does not contain any known toxic principles that would cause serious illness or systemic poisoning in pets. This classification makes it a popular choice for households with curious cats and dogs.
What non-toxic means for pets in the home
Having a non-toxic plant like the Boston Fern means you do not need to worry about a poisoning emergency if your pet nibbles on a frond. It provides peace of mind compared to keeping highly toxic plants in an accessible area.
However, non-toxic does not mean the plant is intended to be food. A pet’s digestive system is not designed to process a lot of plant fiber. Eating more than a small amount of any plant, even a safe one, can lead to stomach discomfort, vomiting, or diarrhea. This is a physical reaction to the indigestible material, not a chemical poisoning.
Points to consider with any houseplant
Even with safe plants, it is always best to practice good pet safety. Discouraging pets from chewing on houseplants is a good habit to establish.
- Prevent overeating. To avoid digestive upset, try to place plants where your pets cannot easily access them to eat them as a snack. A hanging basket is a common solution for ferns.
- Check for other risks. Be mindful of things other than the plant itself. Decorative pots may be breakable, and soil can sometimes contain fertilizers or pesticides that could be harmful if ingested. Always read the labels of any products used on or near your plants.
- Supervise your pets. Close observation is especially important with young, curious puppies and kittens who may be more inclined to chew on new objects in their environment.
When to call your vet
A non-toxic listing means the plant is not expected to poison pets, not that eating it is harmless. Call your vet if your pet shows any of the signs below after chewing on a plant.
If your pet eats any part of a Boston Fern and shows signs of significant or persistent vomiting, diarrhea, or loss of appetite, it is best to contact your veterinarian. For any suspected poisoning, you can also call the ASPCA Animal Poison Control Center at (888) 426-4435. A consultation fee may apply. Note what part of the plant and how much your pet ate, and have the plant’s name ready.
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.