Is Moon Cactus toxic to cats?

No — moon cactus 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 does not individually list Gymnocalycium mihanovichii, and the genus (family Cactaceae) has no documented toxic chemistry. The dominant photosynthesising rootstock in grafted moon cacti, Hylocereus undatus (dragon fruit), IS listed by the ASPCA as non-toxic to cats and dogs. On that basis the plant is treated as pet-safe. The real hazard is physical: the rootstock's stiff spines can puncture skin, so keep curious pets from pawing or chewing it.

Yes — the ASPCA lists moon cactus 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: Moon Cactus is non-toxic to dogs as well. See the full moon cactus 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.