Hoya
Also known as Wax Plant, Hindu Rope Plant, Porcelain Flower. One plant, one grade per pet — the verdicts below are transcribed from primary sources and human-reviewed.
Hoya is non-toxic to cats (S0 Safe): the ASPCA lists the wax plant (Hoya carnosa) as safe for cats and dogs — the milky sap looks suspicious but carries no toxin on record.
FULL VERDICT →Hoya is non-toxic to dogs (S0 Safe): the ASPCA lists the wax plant (Hoya carnosa) as safe for dogs and cats, and Pet Poison Helpline says eating it could cause a bad taste or mild stomach upset, but is not likely to need an urgent vet trip.
FULL VERDICT →Care at a glance
When to call the vet
FAQ
Are all hoyas covered by this verdict, or only Hoya carnosa?
Hoya carnosa is the hoya we grade: the ASPCA's Wax Plant entry gives the scientific name Hoya carnosa 'krinkle kurl', with the other names Hindu rope plant and porcelain flower, and lists it as "Non-Toxic to Dogs, Non-Toxic to Cats" with toxic principles "Non-toxic." Pet Poison Helpline's safe-plants article names Hoya in a group of succulents that "could cause a bad taste in the mouth or mild stomach upset" — a nuisance note, not a toxin. The ASPCA also has two other hoya entries, Sweetheart Hoya and Silver Pink Vine; both read "Non-Toxic to Dogs, Non-Toxic to Cats, Non-Toxic to Horses." We have not graded those plants ourselves, so this page's S0 grade covers Hoya carnosa only. If the tag says Hoya carnosa, this page applies; if a pet chews it, Pet Poison Helpline says it could cause a bad taste or mild stomach upset.