Is Cyrtomium macrophyllum toxic to cats?

No — cyrtomium macrophyllum is listed by the ASPCA as non-toxic to cats. It is a sensible choice for a home with a cat; a curious nibble will not poison them, though no plant is meant to be eaten. ASPCA-lists the genus Cyrtomium as non-toxic to cats and dogs via Holly Fern / Japanese Holly Fern (Cyrtomium falcatum), with no toxic principle identified. C. macrophyllum is the large-leafed holly fern in the same genus; as with any plant, eating large quantities may cause mild, self-limiting gastrointestinal upset.

Yes — the ASPCA lists cyrtomium macrophyllum as non-toxic to cats and dogs. A cat that chews a large amount of any foliage can still get a mild, brief stomach upset, so discourage grazing, but it will not be poisoned.

The ASPCA classification Growli uses applies to both cats and dogs: Cyrtomium macrophyllum is non-toxic to dogs as well. See the full cyrtomium macrophyllum pet-safety guide for both species.

Reliable ASPCA non-toxic picks for a cat home include spider plant, calathea, parlor palm, peperomia, and most true ferns. Browse the best cats-safe plants list to check more before you buy.