Plants Toxic to Cats: 12 Houseplants to Remove Today

Which Houseplants Are Toxic to Cats?

Many of the most popular houseplants are toxic to cats, including lilies, pothos, philodendron, peace lilies, sago palms, snake plants, and aloe vera. Most cause drooling, vomiting, and mouth irritation. A few are far worse: true lilies can cause fatal kidney failure from even a tiny exposure, and sago palms can cause deadly liver failure. If you share your home with a cat, the safest move is to identify every plant you own and remove the dangerous ones today.

That may sound drastic, but cats are not casual about plants. They chew leaves out of curiosity, boredom, or an instinct to nibble greenery, and they groom pollen and sap off their fur afterward — which means a cat doesn't even have to bite a plant to be poisoned by it. "My cat has never touched my plants" holds right up until the day it doesn't.

This guide walks through the 12 worst offenders, what each one actually does to a cat, what to do if your cat has already chewed something, and safe plants you can enjoy instead.

The 12 Houseplants to Remove Today

Here's the short list, ranked roughly from most to least dangerous. Severity refers to a typical exposure — any of these warrants a call to your vet.

English ivy, oleander, azalea, and many spring bulbs (tulips, hyacinths, daffodils) are also toxic — the list above covers the plants most commonly found inside homes, not everything that can hurt a cat.

1. True Lilies and Daylilies — The Emergency Case

If you remember one thing from this article, make it this: lilies are deadly to cats, and any lily exposure is an emergency.

Easter lilies, tiger lilies, Asiatic lilies, stargazer lilies, and daylilies cause acute kidney failure in cats. Every part of the plant is dangerous — petals, leaves, stems, pollen, even the water in the vase. A cat that brushes against a bouquet and licks pollen off its coat, or takes a single bite of a leaf, can go into kidney failure within days. Early signs (vomiting, lethargy, loss of appetite) can appear within hours and may briefly seem to improve before the kidneys fail.

There is no safe amount of lily exposure, and treatment works best when started early — ideally within hours. If your cat has had any contact with a lily, go to a vet or emergency animal hospital immediately. Do not wait for symptoms.

A confusing wrinkle: "lily" appears in the names of plants that aren't true lilies. Peace lilies and calla lilies cause painful mouth irritation but not kidney failure; lily of the valley isn't a true lily either, but it contains cardiac toxins and is genuinely dangerous in its own right. When in doubt, treat any "lily" as an emergency.

2. Sago Palm

Sago palms look like small, friendly indoor palms, but they're among the most dangerous plants a cat can encounter. All parts contain cycasin, a toxin that attacks the liver; the seeds are the most concentrated. Ingestion can cause vomiting, black or bloody stool, bruising, seizures, and liver failure, and even with aggressive treatment the outcome is often poor. This plant does not belong in a home with cats. Period.

3. Kalanchoe

This cheerful flowering succulent contains cardiac glycosides — compounds that affect heart rhythm. Most cat exposures cause vomiting and drooling, but larger ingestions can cause abnormal heart rhythms and weakness. Because you can't judge the dose from the outside, any kalanchoe nibbling deserves a vet call.

4. Cyclamen

Cyclamen's toxins are concentrated in the tubers (the root structure), which cats can reach in a loosely potted plant. Chewing leaves usually causes drooling and vomiting; getting into the tubers can cause heart rhythm problems and seizures.

5–9. The Calcium Oxalate Group: Dieffenbachia, Peace Lily, Pothos, Philodendron, Monstera

These five are grouped together because they share the same weapon: insoluble calcium oxalate crystals. When a cat bites the plant, microscopic needle-like crystals embed in the mouth, tongue, and throat.

Is pothos toxic to cats? Yes. Pothos (devil's ivy) — one of the most common houseplants in America — causes intense oral pain, drooling, pawing at the mouth, vomiting, and difficulty swallowing. The same goes for philodendron, monstera (Swiss cheese plant), peace lily, and dieffenbachia (dumb cane), which is the most severe of the group.

The good news: these are rarely fatal, because the immediate pain usually stops a cat from eating much. The bad news: "rarely fatal" still means a miserable, painful experience, and significant swelling in the mouth or throat can interfere with breathing in severe cases. If your cat is struggling to breathe after chewing a plant, that's an emergency — see our guide on fast or labored breathing in cats for the signs that mean "go now."

10. ZZ Plant

The famously indestructible ZZ plant contains the same insoluble calcium oxalates as the group above. Chewing it typically causes mouth irritation, drooling, and vomiting — usually milder than the dieffenbachia group, but unpleasant enough to justify removal.

11. Aloe Vera

Aloe is medicinal for humans and mildly toxic for cats. The latex layer just under the skin of the leaves contains compounds that cause vomiting, diarrhea, and lethargy. It won't usually cause severe poisoning, but a cat that develops a taste for aloe will be repeatedly, unnecessarily sick.

12. Snake Plant

Snake plants (mother-in-law's tongue) contain saponins that cause nausea, vomiting, and diarrhea. Like aloe, this is usually a mild-to-moderate poisoning rather than a life-threatening one — but it's an easy plant to give up. If you keep one for the upright, architectural shape, the cast-iron plant in the safe list below gives you stiff, strappy, dark green foliage without the saponins.

What to Do If Your Cat Eats a Toxic Plant

Move quickly and calmly, in this order:

1. Remove your cat from the plant and gently clear any plant material from its mouth and fur. If there's pollen on the coat (especially lily pollen), wipe it off with a damp cloth so your cat can't groom it in.
2. Identify the plant. Take a photo or a leaf sample. Treatment depends heavily on which plant it was.
3. Call for help immediately. Contact your vet, the nearest emergency animal hospital, or a pet poison hotline such as the ASPCA Animal Poison Control Center at (888) 426-4435 or the Pet Poison Helpline at (855) 764-7661 (both charge a consultation fee).
4. Do not induce vomiting and do not give milk, food, or any home remedy unless a veterinary professional specifically tells you to. Making a cat vomit the wrong substance can cause additional injury.
5. For any lily or sago palm exposure, skip straight to the emergency vet. Don't wait for symptoms — by the time a lily-exposed cat looks sick, kidney damage is already underway.

Common early signs of plant poisoning include drooling, pawing at the mouth, vomiting, diarrhea, lethargy, and loss of appetite. Vomiting has many causes in cats — our guide to why cats throw up covers the range — but vomiting plus known plant access should always be treated as a poisoning until proven otherwise. If you're unsure whether what you're seeing is serious, review the broader warning signs that a cat is sick and err on the side of calling your vet.

Cat-Safe Houseplants You Can Keep Instead

Going plant-free isn't the only option. These popular houseplants are considered non-toxic to cats:

• Spider plant — nearly unkillable, and safe even though many cats love to chew it
• Boston fern — lush and dramatic; a good visual stand-in for more dangerous ferny plants
• Areca palm and parlor palm — the safe way to get the palm look (never sago)
• Cast-iron plant — upright, stiff, strappy dark green leaves and the same tolerance for neglect; the closest cat-safe substitute for a snake plant
• Calathea and prayer plant — bold patterned foliage, cat-safe
• Peperomia — huge variety of shapes and colors
• Ponytail palm — sculptural and safe despite the name
• Phalaenopsis orchids — the common moth orchid is non-toxic to cats
• African violet — safe flowering color for windowsills
• Cat grass and catnip — greenery grown for your cat to chew, which can redirect nibbling away from everything else

Two caveats. First, "non-toxic" means the plant won't poison your cat — a cat that eats a large amount of any plant can still vomit from simple stomach irritation. Second, always double-check a plant by its scientific name before buying; common names overlap in confusing ways (as the "lily" problem shows). The ASPCA maintains a searchable toxic and non-toxic plant database that's worth bookmarking.

How to Keep Cats Out of Your Plants

If you have mildly toxic plants you're not ready to part with — or safe plants you'd rather not have shredded — a few strategies genuinely help:

• Elevation isn't enough on its own. Cats jump. Hanging planters in cat-free zones work better than high shelves.
• Make the plant unappealing — but not with citrus. A pet-safe commercial deterrent spray, used as labeled, is the right tool here. Skip the popular citrus-peel trick: citrus is itself toxic to cats (the essential oils and psoralens can cause vomiting, diarrhea, depression, and skin reactions), so peels on the soil just add a second toxic plant to a pot your cat is already investigating.
• Cover the soil with large decorative stones to stop digging (which also prevents access to bulbs and tubers).
• Offer a legal alternative. A pot of cat grass gives the chewing instinct somewhere to go.
• Close the door. For anything on the dangerous list that you truly can't rehome — a sentimental sago palm, say — a permanently cat-free room is the only barrier that actually counts.

For more on setting up a home that works for both of you, browse our Life at Home guides.

The Bottom Line

Walk through your home today with this list in hand. Anything in the top four — lilies, sago palm, kalanchoe, cyclamen — should leave the house entirely; rehome it to a cat-free friend. The oxalate group and the mild irritants are judgment calls, but with so many beautiful cat-safe alternatives available, most owners find it easier to swap them out than to police them forever.

And one rule is worth burning into memory: no lilies, ever — not as houseplants, not in bouquets, not "just for the weekend." It is the single most important plant-safety fact a cat owner can know.