Is Opposite-leaf Cliff Stonecrop toxic to cats?

No — opposite-leaf cliff stonecrop 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. Prometheum is not individually listed by the ASPCA. The genus belongs to Crassulaceae subfamily Sempervivoideae, closely related to Rosularia and Sempervivum, neither of which has documented toxic principles. No toxic compounds have been reported for this genus. Consider it provisionally safe but prevent pets from ingesting plant material as a precaution.

Yes — the ASPCA lists opposite-leaf cliff stonecrop 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: Opposite-leaf Cliff Stonecrop is non-toxic to dogs as well. See the full opposite-leaf cliff stonecrop 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.