English ivy vs Wax plant

Hedera helix · Hoya carnosa

Pet safety: Wax plant is listed non-toxic to cats and dogs; English ivy is toxic (triterpenoid saponins). If the two are sold under the same name, a mislabelled plant is a genuine risk in a house with animals.

Why these two get mixed up

Wax plant is recorded here as a pet-safe alternative to English ivy, so the question is usually whether the swap is actually a fair one.

English ivy (Hedera helix) — **English ivy** — Hedera helix. Photograph by kallerna, Wikimedia Commons , CC BY-SA 4.0.

Wax plant (Hoya carnosa) — **Wax plant** — Hoya carnosa. Photograph by Yvan leduc, Wikimedia Commons , CC BY-SA 3.0.

	English ivy	Wax plant
Scientific name	Hedera helix	Hoya carnosa
Family	Araliaceae	Apocynaceae
Light floor	Low	Medium
Water	6–11 days	10–18 days
Humidity floor	40%	40%
Mature height	6–96 in	12–144 in
Habit	trailing	trailing
Growth rate	fast	moderate
Difficulty	Moderate	Easy
Toxic to pets	Yes	No
Typical price	$8–25	$15–60

Highlighted cells are where the two actually differ. Everything else they share.

The differences that matter

Pet safety

This is the difference that matters most. Wax plant is listed non-toxic to cats and dogs; English ivy is toxic (triterpenoid saponins). If the two are sold under the same name, a mislabelled plant is a genuine risk in a house with animals.

Mature size

Wax plant reaches about 144 inches; English ivy tops out near 96. Buying the wrong one for a shelf means rehoming it in a year.

Light

English ivy tolerates low light; Wax plant needs medium as a floor. Put the second in the first's spot and it stretches and declines.

Watering

English ivy wants water every 6–11 days, Wax plant every 10–18. On one shared watering schedule, one of them drowns.

Not even related

English ivy is Araliaceae, Wax plant is Apocynaceae. They share a shop label and nothing else — different families, different continents, different care.

Which should you buy?

With a cat or dog in the house, take Wax plant. The other is toxic, and if the shop label is wrong you will not know which you have brought home.
In a dim room, take English ivy.
If you forget to water, take Wax plant, which goes 14 days between drinks.
If it is your first plant, take Wax plant, at 2 of 5.
For a small shelf, take English ivy, which stops around 96 inches.

Full entries

English ivy — care fields with sources, toxicity with every authority consulted, propagation and diagnosis. Wax plant — the same.

Sources

This database's own care records for Hedera helix and Hoya carnosa — every figure compared above.
Royal Botanic Gardens Kew, Plants of the World Online — accepted names and families for Hedera helix and Hoya carnosa
ASPCA Animal Poison Control — toxicity classification for both, cited on each species entry
Photographs: Wikimedia Commons, individually credited and licensed above

Compiled and edited by Tony Valcarcel · 2026-09-12
Every comparison above is drawn from a recorded field. Where the honest distinguisher is visual we show both photographs rather than describing a leaf we have no field for. How this is sourced.