Lilies kill cats. Not in a calcium-oxalate-mouth-irritation way like pothos or peace lily. In a kidney-failure-within-72-hours way that requires IV fluids within 6 hours of exposure to survive. If you are reading this because you just realized your cat had contact with a lily, scroll to the next section and call Pet Poison Helpline at 855-764-7661 before reading anything else. The rest of this article assumes you have either already called or that the cat in question has not actually been exposed yet.

PET SAFETY ALERT. If your cat ate any part of a true lily, including pollen or vase water, this is a genuine emergency. Call Pet Poison Helpline: 855-764-7661 or ASPCA Animal Poison Control: 888-426-4435 now, or go directly to an emergency vet. Asymptomatic does not mean safe. Lily poisoning has a 24-hour gap where the cat looks normal while the kidneys are failing.

TL;DR

  • True lilies (genus Lilium and Hemerocallis) are extremely toxic to cats. Easter, Tiger, Asiatic, Oriental, Stargazer, Rubrum, Daylily. Every part is toxic, including pollen and vase water. Even tiny exposures kill.
  • Five plants called “lily” are NOT true lilies and have different rules. Peace Lily, Calla Lily, Peruvian Lily, Lily of the Valley (cardiac emergency, different mechanism), and Canna Lily (the one that is not toxic at all).
  • The first 6 hours after exposure are the only window where treatment reliably works. Do not wait for symptoms.
  • Symptoms: vomiting (0 to 6 hours), then false recovery, then kidney failure (24 to 72 hours).
  • Treatment: IV fluids for 48 to 72 hours, kidney bloodwork at 24 and 48 hours. Cost typically $1,500 to $5,000.
  • Prevention: do not bring true lilies into a cat household. There is no safe placement strategy.

First, is it a true lily? (the only question that matters)

The word “lily” appears in the common name of more than ten different plants from at least four different botanical families. Some kill cats. Most don’t. The single most important question when your cat has had contact with a flower is which kind of lily.

A true lily is in the genus Lilium or Hemerocallis. That’s it. If the flower came from a florist labeled “lily” without a more specific name, assume it is true lily until proven otherwise. The seven true-lily varieties common in floral arrangements and gardens are:

  1. Easter Lily (Lilium longiflorum), the trumpet-shaped white lily sold at Easter
  2. Tiger Lily (Lilium lancifolium), orange with black spots
  3. Asiatic Lily (Lilium asiaticum cultivars), the most common cut-flower lily, many colors
  4. Oriental Lily (Lilium orientalis cultivars), including Casablanca and Stargazer
  5. Rubrum Lily / Japanese Show Lily (Lilium speciosum), pink-and-white spotted petals
  6. Stargazer (Lilium orientalis ‘Stargazer’), pink with darker freckles
  7. Daylily (Hemerocallis spp.), the common landscaping lily with strappy leaves, blooms last one day

All seven are deadly to cats from any exposure. If you are not sure, treat the flower as a true lily and get to the vet. Misidentification on the side of caution is free; misidentification on the side of false reassurance is fatal.

The five plants that contain the word “lily” but are NOT true lilies are covered later in this article. None of them cause kidney failure. If your cat had contact with one of those instead, you are in a much better situation. But verify before relaxing.

If your cat ate a true lily (do this now)

The protocol below comes from the FDA’s Lovely Lilies and Curious Cats advisory, the UC Davis School of Veterinary Medicine lily-toxicity reference, and the Fitzgerald 2010 peer-reviewed review paper (cited 97 times in subsequent veterinary literature). I am not a veterinarian. Call the helpline or your vet for guidance specific to your cat.

First 30 minutes

  1. Call Pet Poison Helpline at 855-764-7661 (or ASPCA Animal Poison Control at 888-426-4435). Both are open 24/7. The consultation fee ($75 to $95) is worth paying. They will give you a case number and a direct line to relay to your vet.
  2. Get to an emergency vet. Do not wait to see if your cat develops symptoms. The window where treatment works is the window before symptoms appear.
  3. Bring the plant. A leaf, a flower, a piece of stem, anything that lets the vet confirm species. A clear photo also works.
  4. Wash the cat if there is visible pollen on the fur. Use a damp cloth to wipe pollen off paws, face, and coat before the cat can groom it. Do not bathe a stressed cat fully; just remove what you can see.
  5. Do not induce vomiting at home. Cats are not dogs. At-home hydrogen peroxide can cause serious harm in cats. The vet has medical-grade emetics that are safe and effective.

First 6 hours (the only treatment window that reliably works)

The standard treatment is IV fluid decontamination, started within 6 hours of exposure. The fluid load supports the kidneys and helps flush the toxin before it concentrates in renal tissue. Cats treated within 6 hours have very high survival rates. Cats treated after 18 hours often do not survive. This timeline comes directly from Virginia Tech Veterinary Teaching Hospital and is consistent with the Fitzgerald review.

At the ER, expect:

  • Induced vomiting (if the exposure was less than 60 minutes ago and the cat has not already vomited)
  • Activated charcoal to bind any remaining toxin in the gut
  • IV catheter and aggressive fluid therapy at twice the maintenance rate
  • Bloodwork (BUN, creatinine, SDMA, potassium) at intake, 24 hours, and 48 hours
  • Hospitalization for 48 to 72 hours minimum

6 to 18 hours

This is the gap where the cat may appear to recover. Vomiting stops. Energy may return. The cat may eat. This is not recovery. It is the gap between gastrointestinal symptoms and kidney symptoms. The toxin is being concentrated in the kidneys during these hours. The decision the cat is fine and can go home is the single most common mistake in lily exposures.

If you have a vet who has not seen lily cases recently and suggests sending the cat home in this window because they look fine, ask for a second opinion or call Pet Poison Helpline yourself. The treatment protocol calls for 48 hours of IV fluids regardless of how the cat looks at hour 12.

18 to 72 hours

Kidney damage that began at hour 12 to 18 becomes irreversible by hour 18 to 24. From here on, the symptoms are renal:

  • Lethargy worsening to obtundation
  • Anuria (no urine production) or oliguria (very little)
  • Vomiting returning (now uremic vomiting, not gastric)
  • Dehydration despite IV fluids
  • Death from acute kidney failure typically at 36 to 72 hours

Cats that reach this stage rarely survive. The intervention is dialysis, available at very few veterinary hospitals, expensive ($5,000 to $15,000), and not always successful. The case for moving in the 6-hour window cannot be overstated.

Phone numbers (save these now)

  • Pet Poison Helpline: 855-764-7661 (24/7, $85 fee, opens a case file your ER vet can pull)
  • ASPCA Animal Poison Control Center: 888-426-4435 (24/7, $95 fee, the most-cited reference)
  • Your local emergency vet if you cannot reach a helpline
  • Your regular vet as a backup, but emergency vets handle lily exposures more often

My cat ate a lily and seems fine (do this anyway)

This section exists because it is the most common path to a preventable death. Owners notice the cat brushed against a lily or chewed a petal, watch the cat for an hour, see no symptoms, and decide it must have been fine. By the time the cat is lethargic and not urinating, it is too late.

The first hours after lily exposure are deceptive. Vomiting may occur within 0 to 6 hours but resolves on its own. The cat then enters a window of 24 to 36 hours where they look healthy. The toxin is concentrating in the kidneys. By the time external symptoms reappear, kidney damage is permanent.

If your cat had any contact with a true lily, the correct action is to go to the vet within 6 hours regardless of how the cat looks. The Pet Poison Helpline triage will not tell you to watch and wait with a true-lily exposure. They will tell you to go.

The cost of a false alarm (vet visit for a cat that turns out to have not really eaten anything) is $200 to $400 for an exam and bloodwork. The cost of waiting for symptoms is your cat’s life.

If you are certain the exposure was not a true lily (you can identify the specific genus, see the sections below), the calculus changes. If you are not certain, treat as true lily and go.

The 7 true lilies that kill cats

These are the Lilium and Hemerocallis species. Every part of every species is toxic. The toxin has not been chemically identified per the FDA, but the clinical effect is consistent across the genus: acute kidney failure within 12 to 72 hours of exposure.

Easter Lily (Lilium longiflorum)

The classic large white trumpet lily sold around Easter. Often a single-stem potted plant, also common in mixed bouquets. Extremely high cat-exposure risk because Easter is a major gifting holiday and these plants land in cat households unprompted. Per the FDA, Easter lily ingestion is one of the most common true-lily poisonings reported to APCC.

Tiger Lily (Lilium lancifolium)

Orange petals with dark spots, curved-back petals (recurved), often grown in gardens but also in mixed cut bouquets. Just as toxic as Easter lily.

Asiatic Lily (Lilium asiaticum hybrids)

The most common cut-flower lily, sold in many colors (yellow, pink, orange, red, white). Often a primary component of “lily bouquets” from supermarkets and grocery florists. If a flower is labeled simply “lily” in a mixed bouquet, this is most likely what it is.

Oriental Lily (Lilium orientalis hybrids)

Includes the Stargazer Lily (‘Stargazer’) and Casablanca Lily (‘Casablanca’). Larger, more fragrant flowers than Asiatic, common in formal arrangements and weddings. The fragrance is strong enough that pollen contamination of nearby surfaces is more likely.

Rubrum and Japanese Show Lily (Lilium speciosum)

Pink and white spotted petals, late-summer bloomer. Common in late-summer garden cuttings and arrangements.

Stargazer (Lilium orientalis ‘Stargazer’)

Technically an Oriental cultivar but searched separately. Pink with darker freckles, very common in sympathy arrangements. The dense pollen on Stargazer flowers is a particular contact-route concern.

Daylily (Hemerocallis spp.)

A different genus from Lilium but every bit as toxic. Daylilies are the strap-leaved landscape lily that produces one bloom per stem per day. Common in garden borders, less common in cut bouquets. Outdoor cats with access to garden beds containing Daylily are at risk.

The 5 “lilies” that are NOT true lilies

These plants share the word “lily” in their common name but are unrelated to Lilium/Hemerocallis. None cause kidney failure. Each has its own toxicity rules.

Peace Lily (Spathiphyllum)

Not a true lily. Family Araceae (same as pothos, philodendron, monstera). The toxicity is calcium oxalate crystals causing oral irritation, drooling, and possible vomiting, resolving in 12 to 24 hours. Uncomfortable but not life-threatening, and not a kidney emergency. For the full guide, see our Peace Lily and cats article.

Calla Lily (Zantedeschia)

Not a true lily. Also family Araceae, same calcium-oxalate mechanism as Peace Lily. Mouth burning, drooling, possible vomiting, recovery within a day. Not a kidney emergency. Same general approach as for pothos or monstera exposure: uncomfortable, watch the cat, almost always fine within 24 hours.

Peruvian Lily (Alstroemeria)

Not a true lily. Family Alstroemeriaceae. Per the ASPCA, Peruvian lily can cause mild stomach upset (vomiting, diarrhea), but is not expected to cause life-threatening injury to any organs. The mildest of the “lily” exposures. Common in supermarket bouquets, often mistaken visually for true lilies. Worth identifying because the response is so different.

Lily of the Valley (Convallaria majalis)

Not a true lily, but this one is its own emergency. Family Asparagaceae. Lily of the Valley contains cardiac glycosides (cardenolides), which cause vomiting, diarrhea, and serious cardiac arrhythmias. This is a different emergency from true lily kidney failure but it is still an emergency. Per ASPCA, treat Lily of the Valley exposure with the same urgency as true lily exposure: call the helpline, get to the vet. Symptoms are GI signs progressing to cardiac signs (slow or irregular heartbeat, weakness, low blood pressure).

Canna Lily (Canna spp.)

Not a true lily, and not toxic. Family Cannaceae. Per ASPCA, Canna is classified as non-toxic to cats and dogs. The one “lily-named” plant that does not require any response from a cat-household perspective. If you found out the flower was a Canna lily, you can stop reading and go pet your cat.

What parts of the lily are toxic?

Every part. Per the FDA: stems, leaves, flowers, pollen, and vase water are all toxic. The toxin is concentrated throughout the plant tissue and dissolves into vase water within hours of cutting. There is no safe part of a true lily.

The exposure routes that catch owners off guard:

  • Pollen on fur. Cat brushes against a lily, gets pollen on its coat or whiskers, grooms it off later. This is a poisoning event. Pollen contamination is one of the most-cited exposure routes in the Fitzgerald 2010 review and a major reason “just keep the lily on a high shelf” is not adequate.
  • Vase water. Cats drink from any standing water they can reach. Water from a vase containing true lilies is toxic. A cat drinking from a discarded vase, or knocking over a vase and stepping in the water, is exposed.
  • Petals on the floor. Lilies shed. A petal falling from an arrangement onto a surface the cat then walks on, sniffs, or chews is an exposure route.
  • Bulb in the soil. Outdoor cats digging in flower beds with Daylily or true-lily bulbs can eat bulb material, which is also toxic.

The practical takeaway: a household with cats and true lilies is in an unsafe configuration regardless of where the lilies are placed. There is no safe location.

How vets treat lily poisoning (what to expect at the ER)

The standard protocol for a confirmed or suspected true-lily exposure follows the same general arc at most emergency veterinary hospitals. Knowing what to expect helps you make decisions quickly during a stressful visit.

Triage and history. The vet will ask what was eaten, how much, when, and whether the cat has vomited. Bring the plant if you can. They may run a quick exam (heart rate, hydration, mucous-membrane color).

Decontamination. If exposure was within the last 60 minutes, the vet will induce vomiting using injectable medication (typically dexmedetomidine or hydromorphone, not hydrogen peroxide). After the cat vomits, they may give activated charcoal by mouth or stomach tube to bind any remaining toxin.

IV fluids. A catheter is placed and the cat is started on fluid therapy at approximately twice the maintenance rate (5 to 6 mL/kg/hour for a typical cat). The fluids are continued for 48 to 72 hours at minimum. This is not negotiable; shortening the duration is what causes treated cats to develop kidney failure anyway.

Bloodwork monitoring. BUN, creatinine, and SDMA (the kidney markers) are checked at intake, 24 hours, and 48 hours. Potassium is also monitored. The vet is looking for rising creatinine, which indicates kidney damage progressing despite treatment.

Hospitalization cost expectations. A typical lily-exposure hospitalization is $1,500 to $4,500 for 48 to 72 hours, depending on region and ER versus general-practice rates. Severe cases requiring dialysis run $5,000 to $15,000 and are limited to a small number of veterinary hospitals nationwide.

Discharge. If creatinine remains normal at 48 hours and the cat is eating and urinating normally, discharge typically follows. Most vets will recommend a recheck bloodwork in 1 to 2 weeks to confirm no delayed kidney damage.

Holiday seasonality: when lilies enter cat households

Lily exposures spike around four specific holidays. If you have a cat, mark these in advance and plan flower deliveries accordingly.

Easter (March-April)

Easter Lily (Lilium longiflorum) is the canonical Easter gift plant, often given as a potted plant. Per the FDA, Easter triggers the largest annual spike in true-lily exposures in cat households. Action: before Easter, tell anyone who might send you flowers or a potted Easter Lily that you have a cat. Many people do not know that lilies are deadly to cats; the explanation prevents the gift.

Mother’s Day (May)

Mixed bouquets sent to mothers often contain Asiatic or Oriental lilies, especially in the upper price tiers. Action: if you order flowers for someone with a cat, specify “no lilies” to the florist. Most florists are happy to accommodate; the substitution is roses, sunflowers, or alstroemeria (which is the safer Peruvian lily).

Funerals and sympathy bouquets

Stargazer and Casablanca lilies dominate sympathy arrangements. Action: if you receive a sympathy bouquet, check it for lilies before bringing it into a cat household. The right thing to do is leave the bouquet at a workplace or with a non-cat-owning relative, or remove the lilies and discard them (along with the vase water).

Christmas and winter holidays

Amaryllis is often given as a winter gift plant and is sometimes called a lily. Amaryllis is not a true lily and is in a different toxicity category (the bulb contains lycorine, which is toxic but not in the kidney-failure way; mostly GI symptoms). The point: confirm species before assuming, but Christmas season is not typically a high-risk true-lily season the way Easter is.

Pet-safe alternative flowers for cat households

If you want fresh flowers in a cat household, here are common cut flowers the ASPCA classifies as non-toxic. Any of these is a safer choice than a lily-containing arrangement:

  • Roses (Rosa spp.), classic safe choice
  • Sunflowers (Helianthus annuus)
  • Snapdragons (Antirrhinum majus)
  • Orchids (most Phalaenopsis and Cymbidium species)
  • Gerbera Daisies (Gerbera jamesonii)
  • Stocks (Matthiola incana)
  • Zinnia
  • Alstroemeria / Peruvian Lily, despite the name, it is not a true lily and is only mildly toxic

When ordering from a florist for a cat household, the magic phrase is “please mark this no-lily / cat-safe”. Most online florists (1-800-Flowers, ProFlowers, BloomNation, Bouqs) have a notes field that florists actually read. For in-person florists, the request is universally understood. The substitutions are seamless and usually free of charge.

For a fuller list of cat-safe houseplants (not just cut flowers), see our cat-safe houseplants pillar guide.

What to skip

A few things you do not need to do, despite what the internet might suggest:

  • Do not induce vomiting at home. Hydrogen peroxide works for dogs but is not safe for cats. The vet has medical-grade emetics that are safe and far more effective.
  • Do not give milk, butter, or fatty foods. A persistent piece of folk advice for “neutralizing” poisons. It does not work, and it adds GI upset to a cat that may already be vomiting.
  • Do not wait to see if symptoms develop. The 6-hour treatment window is the entire game. Symptoms appearing means you missed the window.
  • Do not rely on a regular vet’s hours. Lily exposures are emergencies and need emergency vets. If your regular vet is closed, go to the nearest ER vet; do not wait for the regular practice to open in the morning.
  • Do not assume Peace Lily, Calla Lily, or Peruvian Lily mean the same thing as Lily. They don’t. But also: if you’re not sure which one your cat encountered, default to treating as true lily and confirm at the vet. Wrong-direction safety is free; wrong-direction reassurance is fatal.

Frequently asked questions

Are lily toxic to cats? Yes. True lilies in the genera Lilium (Easter, Tiger, Asiatic, Oriental, Stargazer, Rubrum) and Hemerocallis (Daylily) cause acute kidney failure in cats. Every part is toxic including pollen and vase water. Treatment is required within 6 hours for high survival.

My cat ate a lily and nothing happened. Is my cat safe? If it was a true lily, no. Lily poisoning has a 24-hour gap where the cat appears normal while the kidneys are failing. Get to the vet within 6 hours of exposure regardless of how the cat looks.

What part of the lily is toxic to cats? Every part. Leaves, stems, flowers, pollen, vase water, and bulbs. No safe part exists.

How much lily is toxic to a cat? Very little. Per Fitzgerald 2010, as few as two leaves, one petal, or licked pollen has caused fatal poisoning. There is no established safe dose.

Are calla lilies toxic to cats? Yes but mildly. Calla lily contains calcium oxalate (oral irritation, drooling, vomiting, 12 to 24-hour recovery), not the kidney toxin in true lilies. It is not a kidney emergency. Treat similar to a pothos exposure.

Is the smell of lily toxic to cats? The scent is not toxic, but smelling a lily often means getting pollen on the nose and whiskers. Cats then groom the pollen off and ingest it. The practical risk is the same as direct ingestion.

How fast does lily poisoning happen? Vomiting starts 0 to 6 hours after exposure. Kidney damage starts at 12 to 18 hours and is irreversible by 18 to 24 hours. Death typically occurs at 36 to 72 hours if untreated.

Can I have lilies in the house with a cat? No, not true lilies. Every veterinary source agrees. The toxic dose is too small and the exposure routes (pollen, water, dropped petals) too varied for placement strategies to be safe.

First signs of lily poisoning in cats? Vomiting (often containing yellow-green plant material), drooling, lethargy, hiding, appetite loss. These appear in the first 6 hours. After that, the cat may seem to recover for 24 to 36 hours before kidney failure begins.

If you found this article while researching plant toxicity for your cat, these sibling guides cover the other common toxic-houseplant categories. None are as severe as true lilies, but each has its own response:

Sources and further reading

If you arrived at this page because your cat had contact with a lily, the right action is the same whether you are still reading or not: call Pet Poison Helpline at 855-764-7661 and get to an emergency vet within 6 hours. Asymptomatic does not mean safe with this plant. The 6-hour window is the entire treatment opportunity. Use it.