Is Toothwort toxic to cats?

No — toothwort 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. Cardamine diphylla belongs to the Brassicaceae (mustard) family and contains glucosinolates that give the rhizomes their characteristic peppery flavour. The plant has a long history of edible use (peppery rhizomes, edible flowers and leaves) by indigenous peoples and is not known to be toxic to pets. It is not individually listed by ASPCA, but Brassicaceae as a family has no significant reported toxicity to dogs or cats. Considered pet-safe, though large amounts of any plant material can cause mild gastrointestinal upset in sensitive animals.

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