Library/Apocynaceae/Hoya/Carnosa
Last reviewed ·

Wax
Plant.

Hoya carnosa

The verdict
Safe — non-toxic to cats

Trailing waxy leaves and porcelain flowers — without pothos oxalates or philodendron raphides. The ASPCA lists wax plant (Hoya) as non-toxic to cats.

Where to buy
Also at Etsy
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Botanical plate — Wax Plant with thick trailing leaves
Fig. I · Habit
10 cm

Plate IHoya carnosa — thick waxy foliage on trailing stems. The ASPCA wax plant entry covers Hoya species sold as Hindu rope plant.

At a glance
Toxicity
Noneto cats
Also known as
HoyaHindu Rope Plant
Native to
Eastern AsiaAustralia
Light
Bright, indirectsome direct OK
Swap for
Pothostoxic vine

What happens if your cat eats it.

Yes — wax plant (Hoya) is safe for cats. The ASPCA lists Hoya carnosa as non-toxic. Thick waxy leaves trail from shelves and hanging pots like pothos — without raphides or oral pain.

Pothos and philodendron are among the most chewed toxic vines in cat households. Hoya is the ASPCA-backed substitute for the same high shelf or macramé hanger.

Trailing without oxalates

Insoluble calcium oxalate crystals in pothos cause immediate drooling and pawing at the mouth. Hoya's thick leaves store water and lack those crystals. Cats may still investigate — the outcome is uneventful.

Blooms as a bonus

Mature Hoyas produce fragrant porcelain flowers — star-shaped clusters unlike lily blooms and without renal toxin. Keep stems elevated so buds survive curious batting.

Pair with Swedish ivy

Swedish ivy offers softer trailing texture alongside Hoya's waxy leaves. Both are non-toxic and cover the spots where golden pothos once hung.

Hoya trails like pothos and blooms like an orchid — and ASPCA data places it firmly in the safe column.
§ II · Observed effects

What we have actually seen.

Obs. 01

Trailing habit

Cascades from shelves and hanging pots like pothos — without calcium oxalate crystals.

◦ Common
Obs. 02

Thick leaves

Succulent-like foliage deters some chewers. Non-toxic if nibbled.

◦ Occasional
Obs. 03

Porcelain flowers

Fragrant star-shaped blooms are not lily-toxic. Discourage chewing to preserve flowers.

◦ Occasional
Obs. 04

Sap confusion

Hoya is non-toxic despite milky sap in some Apocynaceae. Do not confuse with toxic euphorbias.

◦ Rare
§ III · Cultivars in cultivation

Four common varieties.

Carnosa
sp. Carnosa

Carnosa (classic)

Oval waxy green leaves — the standard wax plant, most widely sold.

Compacta
cv. Compacta

Compacta (Hindu rope)

Twisted, curled leaves on compact stems. ASPCA lists this form under wax plant.

Tricolor
cv. Tricolor

Tricolor (variegated)

Pink, cream, and green leaf margins. Needs slightly more light than green forms.

Pubicalyx
sp. Pubicalyx

Pubicalyx (purple stems)

Dark foliage with silvery speckles. Related Hoya species, also non-toxic per ASPCA Hoya guidance.

§ IV · Husbandry

Keeping the plant alive.

Light

Bright, indirect

More light encourages blooming. Some morning sun is fine; scorching midday sun is not.

Water

When dry

Thick leaves store water — let soil dry between waterings. Overwatering causes rot.

Soil

Well-draining mix

Orchid bark blend or cactus mix with houseplant soil. Hoyas like airy roots.

Placement

Hanging or high shelf

Trailing stems suit the same spots as pothos — elevated, out of casual paw reach.

§ V · Sources & references
§ VI · Adjacent species

If you liked this, also safe.

cat safe plants · Pl. XIX
— end of entry —
May 2026