Is Nardoo toxic to cats?

No — nardoo 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. The ASPCA lists Marsilea quadrifolia and Marsilea hirsuta as non-toxic to cats and dogs. Marsilea mutica is the same genus and shares the same lack of known toxic principles. The genus contains thiaminase, an enzyme that breaks down vitamin B1, but this is only of practical concern for livestock consuming very large quantities over extended periods — incidental pet contact is not a documented risk. Regarded as non-toxic for cats and dogs.

Yes — the ASPCA lists nardoo 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: Nardoo is non-toxic to dogs as well. See the full nardoo 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.