Cast iron plant vs Swiss cheese plant

Aspidistra elatior · Monstera deliciosa

Pet safety: Cast iron plant is listed non-toxic to cats and dogs; Swiss cheese plant is toxic (insoluble calcium oxalates).

Why these two get mixed up

Swiss cheese plant is recorded here as a pet-safe alternative to Cast iron plant, so the question is usually whether the swap is actually a fair one.

Cast iron plant (Aspidistra elatior) — **Cast iron plant** — Aspidistra elatior. Photograph by frau-doktor, Wikimedia Commons , Public domain.

Swiss cheese plant (Monstera deliciosa) — **Swiss cheese plant** — Monstera deliciosa. Photograph by Wikimedia Commons contributor, Wikimedia Commons , CC BY-SA 3.0.

	Cast iron plant	Swiss cheese plant
Scientific name	Aspidistra elatior	Monstera deliciosa
Family	Asparagaceae	Araceae
Light floor	Low	Medium
Water	10–14 days	7–10 days
Humidity floor	30%	40%
Mature height	18–30 in	72–120 in
Habit	clumping	climbing
Growth rate	slow	fast
Difficulty	Easy	Easy
Toxic to pets	No	Yes
Typical price	$25–60	$20–60

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. Cast iron plant is listed non-toxic to cats and dogs; Swiss cheese plant is toxic (insoluble calcium oxalates). If the two are sold under the same name, a mislabelled plant is a genuine risk in a house with animals.

Mature size

Swiss cheese plant reaches about 120 inches; Cast iron plant tops out near 30. Buying the wrong one for a shelf means rehoming it in a year.

Light

Cast iron plant tolerates low light; Swiss cheese plant needs medium as a floor. Put the second in the first's spot and it stretches and declines.

Habit

Cast iron plant grows clumping; Swiss cheese plant grows climbing. That decides where each one physically works.

Not even related

Cast iron plant is Asparagaceae, Swiss cheese plant is Araceae. 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 Cast iron 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 Cast iron plant.
If you forget to water, take Cast iron plant, which goes 12 days between drinks.
If it is your first plant, take Cast iron plant, at 1 of 5.
For a small shelf, take Cast iron plant, which stops around 30 inches.

Full entries

Cast iron plant — care fields with sources, toxicity with every authority consulted, propagation and diagnosis. Swiss cheese plant — the same.

Sources

This database's own care records for Aspidistra elatior and Monstera deliciosa — every figure compared above.
Royal Botanic Gardens Kew, Plants of the World Online — accepted names and families for Aspidistra elatior and Monstera deliciosa
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.