Is Square Leaf Hoya toxic to cats?

No — square leaf hoya 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. Hoya rotundiflora is not individually listed in the ASPCA toxic/non-toxic plant database, but the genus is ASPCA-clean: Hoya kerrii (Sweetheart Hoya), Hoya carnosa, and Hoya australis are all listed as non-toxic to dogs, cats, and horses, with no Hoya species listed as toxic. It is therefore considered pet-safe; as always, confirm with your vet, and note that nibbling any plant can cause mild stomach upset.

Yes — the ASPCA lists square leaf hoya 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: Square Leaf Hoya is non-toxic to dogs as well. See the full square leaf hoya 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.