Are ZZ Plants Toxic to Cats? Signs and Safety

By Dr. Zubair Khalid, DVM, MS, PhD ·

Are ZZ Plants Toxic to Cats? Signs and Safety

Are zeezee plants toxic to cats? Yes. ZZ plants (Zamioculcas zamiifolia) contain insoluble calcium oxalate crystals, and chewing on any part of the plant can cause intense mouth pain, drooling, and vomiting in cats. The good news is that these exposures are usually painful but rarely life threatening when handled promptly.

This article is educational and is not a substitute for veterinary diagnosis or treatment.

Quick Answer

  • Every part of a ZZ plant is irritating to cats, including leaves, stems, roots, and the sap.
  • The plant contains insoluble calcium oxalate crystals, the same type of irritant found in many common houseplants [1].
  • Typical signs are drooling, pawing at the mouth, oral pain, vomiting, and sometimes swelling of the lips or tongue.
  • Most exposures cause mild to moderate signs, and many cats recover with supportive care [1].
  • If your cat chewed a ZZ plant, call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661 right away. Do not make your cat vomit unless a veterinarian tells you to.

Is a ZZ Plant Toxic to Cats?

Yes, ZZ plants are toxic to cats. The toxic principle is insoluble calcium oxalate crystals, which are stored in the plant's tissues as tiny, needle-like structures called raphides. When a cat bites or chews the plant, these crystals are released and physically pierce the soft tissues of the mouth, tongue, and throat. This is a mechanical injury, not a chemical poison in the classic sense, which is why the reaction tends to start within minutes of chewing.

Plant poisonings in pets are most often caused by common ornamental garden and house plants that are widely cultivated around the world [2]. ZZ plants fit that description perfectly. They are popular because they tolerate low light and infrequent watering, which means they are found in millions of American homes. That popularity, combined with a cat's natural habit of nibbling greenery, makes ZZ plant exposure a common call to veterinary poison control lines.

It helps to know that plant exposures in cats are not rare. In a 12-year survey of plant poisoning calls, cats made up 26 percent of cases, second only to dogs, and most exposures (73.8 percent) resulted in mild to moderate clinical signs [1]. Fatal outcomes were reported in a smaller share of cases where the outcome was known [1]. For ZZ plants specifically, severe poisoning is uncommon, but the mouth pain can be significant and should not be ignored.

Which Parts of the ZZ Plant Are Toxic?

All parts of the ZZ plant contain calcium oxalate crystals. That includes:

  • Leaves, including the glossy leaflets and the fleshy stalks
  • Stems and rhizomes (the thick underground root-like structures)
  • Roots
  • The sap that leaks out when a leaf or stem is broken

There is no "safe" part of the plant for a cat to chew. Even a small bite of a leaf can cause signs. A cat that digs in the potting soil and chews on a rhizome can have the same reaction as one that nibbles a leaf.

Are ZZ Plant Products Toxic to Cats?

This is a common question, and the answer is not well established in veterinary research. There is no reliable published data on whether dried ZZ plant leaves, ZZ plant cuttings, or products made from the plant cause the same signs in cats. Because the irritant crystals are present in the fresh plant tissue, the safest approach is to treat any ZZ plant material as a potential irritant and keep it out of your cat's reach. If your cat ate a dried leaf or a piece of a ZZ plant product, call a veterinarian or poison control for guidance based on what was eaten and how much.

ZZ Plant Calcium Oxalate Crystals: What They Do in the Body

The crystals in ZZ plants are insoluble calcium oxalate crystals. This matters because soluble oxalates and insoluble oxalates behave very differently in the body.

Insoluble calcium oxalate crystals, like those in ZZ plants, stay in the plant tissue and cause local irritation where they contact tissue. They do not get absorbed into the bloodstream in meaningful amounts, so they do not typically cause the kind of systemic poisoning that affects the kidneys. The damage is concentrated in the mouth, tongue, lips, throat, and sometimes the stomach and intestines if plant material is swallowed.

Soluble oxalates are a different story. Plants that contain soluble oxalates can cause systemic illness, and oxalate can bind calcium in the body, which can lead to low blood calcium and kidney injury. This is the mechanism seen with plants like Cycas revoluta (sago palm), which was one of the plants most commonly implicated in a large survey of plant poisonings in domestic animals [1]. Ethylene glycol, the main ingredient in antifreeze, also causes kidney damage through calcium oxalate crystal deposition in the kidneys, which is a completely different and far more dangerous process than chewing a ZZ plant [3].

So when you read that "ZZ plants contain calcium oxalate," do not confuse that with the kind of oxalate poisoning that damages kidneys. The crystals in ZZ plants act locally. They hurt, they cause drooling and vomiting, but they are not the same as soluble oxalate toxicity.

Signs Your Cat Ate a ZZ Plant

Signs usually appear within minutes to a few hours of chewing the plant. The most common signs are:

  • Excessive drooling or foaming at the mouth
  • Pawing at the mouth or face
  • Whining, crying, or acting distressed
  • Redness, swelling, or irritation of the lips, tongue, or gums
  • Dropping food or refusing to eat
  • Vomiting
  • Hiding or acting withdrawn

Less common signs include swelling of the throat that can make breathing noisy, and stomach upset that lasts a day or two. Most exposures cause mild to moderate signs [1]. Severe signs are uncommon with ZZ plants, but any cat with trouble breathing, severe swelling, or repeated vomiting needs to be seen right away.

How Long Do Signs Last?

Mild oral irritation often improves within a few hours to a day with supportive care. Vomiting and stomach upset may last a bit longer, sometimes one to two days. If signs are not improving within 24 hours, or if they are getting worse, your cat needs veterinary care. The exact timeline varies with how much plant material was chewed and how sensitive your cat is.

When to Call the Vet Right Now

Call immediately if your cat is:

  • Having trouble breathing or making noisy breathing sounds
  • Drooling heavily and cannot swallow
  • Vomiting repeatedly
  • Showing severe swelling of the tongue, lips, or throat
  • Lethargic or unresponsive

If your cat just nibbled a leaf and seems mildly uncomfortable, still call. A veterinarian or poison control specialist can tell you whether you can monitor at home or need to bring your cat in.

What to Do Right Now If Your Cat Ate a ZZ Plant

  1. Move your cat away from the plant. Put the plant out of reach or in a closed room.
  2. Look in your cat's mouth if it is safe to do so. Do not put your fingers deep into the mouth of a painful, stressed cat, because you may get bitten.
  3. Offer water or a small amount of soft food. Some cats feel better after rinsing their mouth, but do not force anything.
  4. Call your veterinarian, the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661. Have the plant name ready, along with your cat's weight, age, and any health conditions.
  5. Do not induce vomiting unless a veterinarian tells you to. Making a cat vomit can cause more irritation on the way back up and can be dangerous if the cat is already having trouble breathing or swallowing.
  6. Do not give human pain medications. Many common pain relievers are toxic to cats, and the dose is not something you can safely guess.

If you are not sure whether your cat actually ate the plant, treat it as a possible exposure and call anyway. It is better to ask than to wait.

How Veterinarians Treat ZZ Plant Poisoning in Cats

Treatment depends on your cat's signs and how much plant material was chewed. In many cases, treatment is supportive and aimed at relieving pain and protecting the mouth and stomach.

Common steps include:

  • Rinsing the mouth gently with water or a dilute solution to remove plant material and crystals
  • Offering soft, bland food and water once your cat can swallow comfortably
  • Medications to coat and soothe the stomach and mouth
  • Anti-nausea medication if vomiting is ongoing
  • Pain relief, chosen and dosed by your veterinarian based on your cat's weight and health
  • Fluids under the skin or into a vein if your cat is dehydrated from vomiting or not drinking

If a large amount of plant material was eaten, your veterinarian may recommend other measures, but the exact plan is set for your individual cat. There is no single antidote for ZZ plant exposure because the problem is local tissue irritation, not a circulating toxin.

If your cat has other health problems, such as kidney disease or a heart condition, tell the veterinarian. That information changes how treatment is planned.

Outlook After a ZZ Plant Exposure

The outlook is generally good. Most cats with ZZ plant exposure have mild to moderate signs and recover with supportive care [1]. The mouth pain is often the worst part, and it usually settles within a day or two.

Cats that develop severe swelling of the throat or repeated vomiting need closer monitoring, and a small number of plant poisoning cases can be fatal [1]. Deaths from ZZ plant exposure alone are uncommon, but any cat that is not eating, not drinking, or struggling to breathe needs prompt care.

If your cat has a history of chewing plants, it is worth reading more about plants toxic to cats so you can spot problems early. Kittens are especially likely to sample houseplants, so house plants toxic to kittens is a helpful companion read. If you want to identify plants by sight, what plants are toxic to cats with pictures can help you match a leaf to a name.

Prevention and Safer Alternatives

The simplest prevention is to keep ZZ plants out of your cat's reach. That can mean:

  • Placing the plant on a high shelf or in a room your cat cannot enter
  • Hanging the plant where your cat cannot jump to it
  • Using a closed cabinet or terrarium for display
  • Removing the plant from your home if your cat is a determined chewer

If you want a houseplant that is safe around cats, look for non-toxic options. The ASPCA lists the Little Zebra Plant (Haworthia subfasciata) as non-toxic to dogs, cats, and horses [4]. Other non-toxic choices include many true ferns, spider plants, and certain palms, but always check each plant by its scientific name before bringing it home. Common names can be misleading, and two plants with the same nickname may have very different toxicity.

If you are choosing new plants, what plants can be toxic to cats and what plants and flowers are toxic to cats can help you build a safer list.

You can also make your home less tempting to chew. Provide cat grass or a safe catnip plant, keep your cat busy with toys and climbing structures, and use a deterrent spray or double-sided tape on plant pots. These steps reduce the chance your cat will nibble on something risky.

Limitations and When to Contact a Veterinarian

This article covers general information about ZZ plants and cats. It cannot tell you how your individual cat will respond. The amount chewed, your cat's size, age, and health all matter, and only a veterinarian who examines your cat can give you a real answer.

Call the same day if your cat:

  • Chewed any part of a ZZ plant
  • Is drooling more than usual
  • Is pawing at the mouth or refusing food
  • Vomited once or twice after plant exposure

Go to an emergency clinic now if your cat:

  • Is having trouble breathing or making noisy breathing sounds
  • Has severe swelling of the tongue, lips, or throat
  • Is vomiting repeatedly and cannot keep water down
  • Is weak, collapsed, or unresponsive

Schedule a routine visit if your cat had a mild reaction that has fully resolved, so your veterinarian can confirm your cat is back to normal and talk about prevention. When in doubt, call. Poison control lines and veterinary clinics are used to these questions, and asking early is always better than waiting.

Frequently Asked Questions

Is a ZZ plant toxic to cats?

Yes. ZZ plants contain insoluble calcium oxalate crystals that irritate a cat's mouth, throat, and stomach when chewed or swallowed. Every part of the plant, including leaves, stems, roots, and sap, can cause signs.

Will my cat die from eating a ZZ plant?

Death is uncommon from ZZ plant exposure alone. Most cases cause mild to moderate signs, and most cats recover with supportive care [1]. Severe cases are more likely if a cat has significant swelling, repeated vomiting, or another health condition, so call a veterinarian right away.

How long after eating a ZZ plant do signs show up?

Signs usually start within minutes to a few hours of chewing. Drooling and pawing at the mouth often appear first, and vomiting may follow. If your cat is still comfortable several hours later, the risk of serious problems is lower, but keep watching for a day.

Can I treat my cat at home after a ZZ plant exposure?

You can offer water and soft food and keep your cat calm, but you should not give medications or try to make your cat vomit on your own. Call your veterinarian or a poison control line first. They will tell you whether home monitoring is safe or whether your cat needs to be seen.

Are ZZ plants safe to keep in a home with cats?

They are not a safe choice if your cat can reach them. The safest option is to remove the plant or keep it in a room your cat cannot enter. If you want a cat-safe plant, choose a species listed as non-toxic, such as the Little Zebra Plant [4], and always verify the plant by its scientific name.

Related Articles

References

  1. Plant poisoning in domestic animals: epidemiological data from an Italian survey (2000-2011). The Veterinary record, 2013.
  2. Potential plant poisonings in dogs and cats in southern Africa. Journal of the South African Veterinary Association, 2009.
  3. Ethylene glycol poisoning in a free-roaming cat associated with suspected animal cruelty: a forensic veterinary case report in South Korea. Frontiers in veterinary science, 2026.
  4. Toxic and Non-toxic Plants: Little Zebra Plant. ASPCA Animal Poison Control Center.

Further Reading