Cat Safe Houseplants: 5 the ASPCA Lists as Non-Toxic

Published 2026-10-26 · 7 min read

Cat safe houseplants are the ones the ASPCA records as non-toxic to cats. That list is shorter than the shelf at the garden centre. Spider plant, African violet, areca palm, Boston fern and Christmas cactus pass. Pothos, peace lily, snake plant, aloe, dieffenbachia and true lilies do not.

What "cat safe" actually means

A cat safe houseplant is a species for which the ASPCA's toxic and non-toxic plants database records no toxic principle in cats. That is the whole claim. Non-toxic is a verdict about poisoning, not a promise that a cat can eat a leaf. Any plant fibre eaten in bulk can still upset a stomach, and a cat that chews through a whole spider plant may vomit once and be perfectly fine.

The database decides by species, not by nickname. "Lily" covers true lilies that can kill a cat and peace lilies that mostly irritate its mouth. The name printed on the pot tells you almost nothing, so match the scientific name before you buy.

Cat safe houseplants: the five to buy

These five are the ones the ASPCA lists as non-toxic for cats, and all five survive normal indoor conditions.

Plant	ASPCA status	What it does well
Spider plant (Chlorophytum comosum)	Non-toxic to cats and dogs	Trails from a shelf and forgives a missed watering
African violet (Saintpaulia species)	Non-toxic to cats, dogs and horses	Flowers on a windowsill in soft light
Areca palm (Dypsis lutescens)	Non-toxic to cats, dogs and horses	Fills a bright corner with arching fronds
Boston fern (Nephrolepis exaltata)	Non-toxic to cats and dogs	Loves the humidity of a bathroom
Christmas cactus (Schlumbergera bridgesii)	Non-toxic to cats, dogs and horses	Flowers in winter with little fuss

They have little else in common. The spider plant wants a bright shelf and drinks freely in summer. The Boston fern sulks the moment its soil dries out. The Christmas cactus wants cooler nights in autumn to set buds. What unites them is the one thing you cannot see: none of them carries a toxin a cat reacts to.

The popular plants that are not safe

Most of the plants sold as easy houseplants are aroids, and the ASPCA lists them as toxic to cats.

Pothos (Epipremnum aureum) is toxic to cats, dogs and horses. The toxic principles are insoluble calcium oxalates. Signs: oral irritation, pain and swelling of the mouth, tongue and lips, excessive drooling, vomiting and difficulty swallowing.
Peace lily (Spathiphyllum) carries the same crystals. Signs run the same way: burning of the mouth, drooling, vomiting, trouble swallowing.
Dieffenbachia adds a proteolytic enzyme to the crystals, and causes intense burning of the mouth, tongue and lips.
Snake plant (Sansevieria trifasciata) works differently. Its saponins cause nausea, vomiting and diarrhoea rather than mouth pain.
Aloe (Aloe vera) also contains saponins and anthraquinones. The ASPCA lists vomiting, lethargy and diarrhoea, and notes that the clear gel inside the leaf is considered edible.

A cat that bites a pothos leaf rarely eats it. The crystals hit the mouth within seconds and the cat backs off, drooling. That is why these plants are painful rather than usually fatal. It is also why a cat can repeat the experiment for years without learning anything.

Why the aroids burn and the others sicken

Insoluble calcium oxalate crystals are the reason a bite of pothos feels like a mouthful of grit. They do not dissolve. They lodge in the soft tissue of the mouth and stay there, which is what produces the swelling and the drooling.

The saponins in snake plant and aloe act further down. They irritate the lining of the stomach and gut, so the first sign is usually vomiting a while after the cat has eaten, not a cat pawing at its face. Anthraquinones in aloe add a laxative effect. Two very different mechanisms, two very different pictures for an owner to recognise.

Lilies: the exception that kills

True lilies (Lilium species) sit in a category of their own. The ASPCA lists them as toxic to cats and records kidney failure as the clinical sign, and it lists no toxic principle at all — nobody has isolated the molecule. The same entry lists lilies as non-toxic to dogs and horses.

That asymmetry matters. A lily in a bouquet is a small risk to a dog and a serious one to a cat. Because the mechanism is unknown, no one can tell you a safe amount and no one can tell you which part is safe. Keep lilies out of a house with a cat. If a cat has had any contact with one, treat it as urgent without waiting for symptoms.

How to keep plants in a house with a cat

Hang the spider plant. Cats love to bat at the plantlets, and a basket at head height ends the game.
Put pots on shelves the cat cannot reach in one jump, and clear a landing space first.
Cover bare soil with large pebbles. Cats dig, and a pot of dry compost doubles as a litter tray.
Group the safe plants where the cat already likes to sit, so the interesting greenery is the legal kind.
Move toxic plants into a closed room, or give them away. A shelf is not a barrier for a determined cat.
Check every new leaf that comes through the door, including cut flowers and gift plants.

How to check a plant before you buy it

Search the ASPCA database by scientific name, not by the label. The database has filters for toxic and non-toxic to cats, and each entry gives the family, the toxic principles and the clinical signs.

Two habits make the check reliable. First, take the botanical name from the label or from a plant identifier app, because garden centres rename the same plant every few years. Second, check the species rather than the genus-wide folklore. Lists passed around online contradict each other constantly, and the ASPCA entry is the one written for poisoning cases.

Why a cat that ignores plants is still at risk

A cat that has walked past a pothos for three years has not proved anything. Cats chew out of boredom, after a move, when a new plant appears, or as kittens exploring with their mouths. The plant that survives a calm cat may not survive a weekend alone with a bored one.

Kittens and young cats chew far more than adults do.
A new plant on the floor is a new object to test.
A cat on a diet, or one with nothing to do, redirects to leaves.

Cut flowers deserve the same check

A bouquet arrives without labels. Ask the florist which species are in it before you take it home, and refuse lilies outright. If nobody can tell you, keep the vase in a room the cat cannot enter and tip the water out in the garden rather than the sink.

If your cat has already chewed a plant

Before you call, have four things ready: the plant's name or a photo of leaf and stem, how much of it looks eaten, the time it happened, and the cat's weight with any signs you can see. The scientific name shortens the conversation, because the ASPCA entry is written per species.

Take the plant away and look at what is missing.
Rinse the mouth with water if the cat will allow it. Do not induce vomiting.
Keep the leaf, or photograph it, so the vet can identify the species.
Note the time and any signs: drooling, pawing at the mouth, vomiting, hiding.
Call your vet, or the ASPCA Animal Poison Control Center on (888) 426-4435. A consultation fee may apply.

When to call the vet

Any contact with a lily, even a few grains of pollen on the fur.
Mouth pain, swelling, drooling or pawing at the face after chewing a plant.
Vomiting more than once, or vomiting with lethargy.
Diarrhoea that lasts more than a day, or any blood in it.
A cat that stops eating or drinking, or hides for hours after plant contact.
Any symptom after chewing a plant you cannot identify.

Non-toxic does not mean free food, and toxic does not always mean an emergency. The species on the label decides which of the two you are dealing with, and the ASPCA database is where that answer is written down.