Are Lilies Toxic to Dogs? A Complete Safety Guide for Dog Owners
Are lilies toxic to dogs? Learn which lily species are dangerous, toxic dose thresholds, symptom timelines, and exactly what to do if your dog ingests lilies.
⚠️ Urgent: If Your Dog Has Ingested Any Part of a Lily
Contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 immediately. A consultation fee of approximately $95 may apply, but this call can save your dog's life. Do not wait for symptoms to appear before calling. Have the following information ready: the type of lily (bring a photo or sample), how much was ingested, your dog's weight, and the approximate time of ingestion.
The short answer to "are lilies toxic to dogs" is yes — many lily species are toxic to dogs, though the severity varies dramatically depending on the specific plant. While lilies are most notoriously lethal to cats (even pollen exposure can cause fatal kidney failure in felines), several lily varieties pose serious health risks to dogs as well. Understanding which lilies are dangerous, how much constitutes a toxic dose, and what symptoms to watch for is essential for every dog owner who keeps these popular ornamental plants in their home or garden.
In this guide, we break down the toxicology of lilies for dogs with specific dose thresholds, symptom timelines, veterinary treatment expectations, and prevention strategies so you can keep your household safe.
Which Lily Species Are Toxic to Dogs?
Not all plants called "lilies" are true lilies, and toxicity levels vary significantly across species. According to the ASPCA's Toxic and Non-Toxic Plants database, here is how the most common lily varieties affect dogs:
| Plant Name | True Lily? | Toxicity to Dogs | Primary Risk |
|---|---|---|---|
| Easter Lily (Lilium longiflorum) | Yes (Lilium) | Moderate to Severe | GI upset, potential kidney effects |
| Tiger Lily (Lilium lancifolium) | Yes (Lilium) | Moderate to Severe | GI upset, lethargy, kidney concern |
| Asiatic Hybrid Lily | Yes (Lilium) | Moderate | GI distress, vomiting |
| Daylily (Hemerocallis) | No (Asphodelaceae) | Mild to Moderate | GI upset, vomiting, diarrhea |
| Lily of the Valley (Convallaria majalis) | No (Asparagaceae) | SEVERE — Life-Threatening | Cardiac glycosides — arrhythmia, seizures, death |
| Peace Lily (Spathiphyllum) | No (Araceae) | Mild | Oral irritation, drooling (calcium oxalate crystals) |
| Calla Lily (Zantedeschia aethiopica) | No (Araceae) | Mild | Oral irritation, swelling, drooling |
| Gloriosa Lily (Gloriosa superba) | No (Colchicaceae) | SEVERE — Life-Threatening | Colchicine alkaloid — multi-organ failure |
Key takeaway: Lily of the Valley and Gloriosa Lily are the most dangerous to dogs due to their potent cardiac glycosides and colchicine content, respectively. True lilies (Lilium species) that are so devastating to cats cause primarily gastrointestinal distress in dogs, though large ingestions can still produce serious complications. The Merck Veterinary Manual notes that while dogs appear more resistant to lily-induced nephrotoxicity than cats, individual sensitivity varies and any ingestion warrants veterinary attention.
Toxic Compounds and Dose Thresholds
The specific toxic compound depends on the lily species your dog encounters:
Lily of the Valley — Cardiac Glycosides (Convallatoxin)
Lily of the Valley contains over 30 cardiac glycosides, with convallatoxin being the most potent. These compounds inhibit the sodium-potassium ATPase pump in cardiac muscle cells, leading to dangerous arrhythmias. The toxic dose for cardiac glycosides in dogs is estimated at approximately 0.5 mg/kg of body weight for convallatoxin. However, because glycoside concentration varies by plant part and growing conditions, any ingestion should be treated as potentially lethal.
Gloriosa Lily — Colchicine Alkaloid
Gloriosa lilies (also called flame lilies or climbing lilies) contain colchicine, the same alkaloid found in autumn crocus. The toxic dose of colchicine in dogs is approximately 0.1–0.5 mg/kg, with doses above 0.5 mg/kg carrying a grave prognosis. All parts of the plant contain colchicine, but the tubers (bulbs) have the highest concentration.
True Lilies (Lilium Species) — Unknown Nephrotoxin
The specific nephrotoxic compound in true lilies has not been definitively identified in veterinary literature. In cats, as little as 0.1–0.2 mg/kg of certain lily fractions can trigger acute kidney injury. Dogs appear to have a higher threshold, but precise toxic dose data for dogs is limited. Ingestion of more than a few petals or leaves, or any amount of pollen, should prompt immediate veterinary consultation.
| Dog Weight | Lily of the Valley — Concern Threshold* | Gloriosa Lily (Colchicine) — Concern Threshold* |
|---|---|---|
| 10 lb (4.5 kg) | ~2.25 mg convallatoxin (≈ 2–3 leaves) | ~0.45 mg colchicine (≈ small bulb fragment) |
| 25 lb (11.3 kg) | ~5.65 mg convallatoxin (≈ 5–7 leaves) | ~1.13 mg colchicine (≈ partial bulb) |
| 50 lb (22.7 kg) | ~11.35 mg convallatoxin (≈ 10–14 leaves) | ~2.27 mg colchicine (≈ 1 small bulb) |
| 75 lb (34 kg) | ~17 mg convallatoxin (≈ 15–20 leaves) | ~3.4 mg colchicine (≈ 1–2 bulbs) |
*These thresholds represent estimated minimum concern levels based on known glycoside and colchicine concentrations per gram of plant material. Actual toxicity varies by plant maturity, growing conditions, and individual dog sensitivity. Always seek veterinary care regardless of estimated dose.
Symptom Timeline: What to Watch For and When
Understanding the progression of lily poisoning symptoms helps you communicate effectively with your veterinarian and recognize the urgency of the situation.
Lily of the Valley / Gloriosa Lily — Symptom Progression
| Timeframe | Symptoms | Severity |
|---|---|---|
| 0–30 minutes | Drooling, pawing at mouth, oral irritation (especially with Araceae "lilies") | Mild |
| 30 min – 2 hours | Vomiting, diarrhea, abdominal pain, loss of appetite, lethargy | Moderate |
| 2–6 hours | Cardiac arrhythmias (Lily of the Valley), weakness, collapse, tremors | Severe |
| 6–24 hours | Seizures, severe bradycardia or tachycardia, dehydration, potential kidney damage (true lilies), multi-organ dysfunction (Gloriosa) | Critical |
| 24–72 hours | Delayed multi-organ failure with colchicine (Gloriosa lily); bone marrow suppression; potential fatality without aggressive treatment | Life-Threatening |
Important distinction: Colchicine poisoning (Gloriosa lily) often follows a deceptive three-phase pattern. Initial GI symptoms may appear to resolve after 12–24 hours, giving a false sense of recovery. This is followed by a second, far more dangerous phase involving bone marrow suppression, organ failure, and potentially death 48–72 hours post-ingestion. Never assume your dog is "fine" because early symptoms stopped.
🚨 Call Your Vet Immediately If Your Dog Shows:
- Vomiting or diarrhea after contact with any lily plant
- Irregular heartbeat, weakness, or collapse
- Seizures or tremors
- Excessive drooling or inability to swallow
- Sudden lethargy or refusal to eat/drink
- Known ingestion of Lily of the Valley or Gloriosa lily (any amount)
ASPCA Animal Poison Control: (888) 426-4435 (available 24/7, consultation fee applies)
Pet Poison Helpline: (855) 764-7661 (available 24/7, consultation fee applies)
Immediate Action Steps: What to Do in the First 15 Minutes
If you witness or suspect your dog has eaten any part of a lily, follow these steps immediately. Time is the single most important factor in lily poisoning outcomes.
- Step 1: Remove your dog from the plant. Physically move your dog away from the lily. Check their mouth for any remaining plant material and gently remove visible pieces. Do not reach deep into the throat.
- Step 2: Identify the plant. Take a clear photo of the lily or, if possible, cut a small sample (flower, leaf, stem) to bring to the vet. Correct species identification directly affects treatment decisions. Note the approximate amount consumed.
- Step 3: Call your veterinarian or ASPCA Poison Control (888-426-4435). Do this before attempting any home treatment. Provide your dog's weight, the plant species (or photo), estimated amount ingested, and time since ingestion.
- Step 4: Follow professional instructions only. Your vet or poison control specialist may advise you to induce vomiting using 3% hydrogen peroxide at a dose of 1 mL per pound of body weight (maximum 45 mL), but only do this if explicitly instructed. Never induce vomiting if your dog is unconscious, having seizures, or if the ingestion occurred more than 2 hours ago.
- Step 5: Transport to the nearest emergency vet clinic. Bring the plant sample, any vomit material (in a sealed bag), and your dog's medical records. If your regular vet is closed, locate the nearest 24-hour emergency animal hospital before leaving.
⚠️ Do NOT induce vomiting without veterinary guidance. In cases of Lily of the Valley ingestion, vomiting can increase the risk of aspiration if cardiac arrhythmias have already begun. Your veterinarian will assess whether emesis is safe based on your dog's current condition and the time elapsed since ingestion.
Veterinary Treatment: What to Expect and Estimated Costs
When you arrive at the veterinary clinic, the treatment protocol will depend on the lily species ingested, the amount consumed, and how much time has passed. Here is what the AVMA and veterinary toxicology references outline for standard lily poisoning treatment:
For True Lilies (Lilium/Hemerocallis) — GI-Focused Treatment
- Decontamination: Induced vomiting (if within 2 hours of ingestion), followed by activated charcoal at 1–4 g/kg to bind remaining toxins in the GI tract
- IV fluid therapy: Aggressive fluid diuresis for 24–48 hours to support kidney function and promote toxin elimination (similar to the protocol used for cats, though dogs are less susceptible to nephrotoxicity)
- Blood work: Baseline and 24–48 hour recheck of BUN, creatinine, SDMA, and electrolytes to monitor kidney function
- Anti-emetics: Maropitant (Cerenia) at 1 mg/kg to control vomiting
For Lily of the Valley — Cardiac-Focused Treatment
- Decontamination: Induced vomiting (if cardiac status is stable) and activated charcoal
- Continuous ECG monitoring: To detect arrhythmias such as bradycardia, AV block, or ventricular tachycardia
- Anti-arrhythmic medications: Atropine (0.02–0.04 mg/kg IV) for bradycardia; lidocaine or other anti-arrhythmics for ventricular tachycardia
- IV fluids with electrolyte management: Careful potassium monitoring, as cardiac glycoside toxicity is worsened by hypokalemia
- Digoxin-specific antibody fragments (Digibind): In severe cases, this antidote can bind cardiac glycosides; cost is significant ($2,000–$5,000+ per treatment course)
For Gloriosa Lily (Colchicine) — Multi-Organ Support
- Aggressive decontamination: Gastric lavage may be performed if ingestion was recent
- Repeated activated charcoal doses: Every 6–8 hours to interrupt enterohepatic recirculation
- Intensive supportive care: IV fluids, GI protectants (sucralfate, omeprazole), broad-spectrum antibiotics if bone marrow suppression occurs
- Blood monitoring: CBC, chemistry panel, and coagulation tests every 12–24 hours for 3–5 days due to delayed toxicity
Estimated Veterinary Costs
| Treatment Component | Estimated Cost Range |
|---|---|
| Emergency exam + initial consultation | $150 – $300 |
| Decontamination (emesis + activated charcoal) | $100 – $250 |
| Blood work (baseline + rechecks) | $200 – $500 |
| IV fluid therapy (24–48 hours hospitalization) | $800 – $2,500 |
| ECG monitoring (Lily of the Valley cases) | $300 – $800 |
| Digoxin-specific antibodies (if needed) | $2,000 – $5,000+ |
| Total estimated range | $1,500 – $8,000+ depending on severity and species |
Pet insurance with emergency/illness coverage typically reimburses 70–90% of these costs after deductible. If you have a policy, contact your insurer during or immediately after the emergency visit to begin the claims process.
Prognosis: Will My Dog Survive Lily Poisoning?
Survival depends heavily on three factors: the lily species, the dose relative to body weight, and the speed of veterinary intervention.
- Mild GI-toxic lilies (Peace Lily, Calla Lily, most true Lilium species in dogs): Prognosis is good to excellent with prompt treatment. Most dogs recover fully within 24–48 hours with supportive care.
- Lily of the Valley: Prognosis is guarded to fair with immediate treatment but can be poor if cardiac symptoms develop before veterinary care begins. Survival rates improve significantly when decontamination occurs within 1–2 hours of ingestion.
- Gloriosa Lily (colchicine): Prognosis is guarded to poor, particularly if treatment is delayed beyond a few hours. The delayed multi-organ phase makes this one of the most dangerous plant poisonings in veterinary medicine. Dogs that survive the first 72 hours generally have a better long-term outlook, but bone marrow suppression can persist for weeks.
Consult your veterinarian for a prognosis specific to your dog's case, as individual factors like age, pre-existing conditions, and concurrent medications all influence outcomes.
Prevention: Keeping Lilies Away From Your Dog
Lily Safety Prevention Checklist
- ☐ Audit your home and garden: Identify every plant your dog can access. Use the ASPCA plant database or the PictureThis app to identify unknown plants.
- ☐ Replace high-risk lilies: Swap Lily of the Valley, Gloriosa lilies, and potted Easter/Tiger lilies for dog-safe alternatives such as roses, sunflowers, snapdragons, or African violets.
- ☐ Elevate or barrier indoor plants: Place all houseplants on shelves at least 4 feet high or behind closed doors. Remember that fallen leaves and petals are still toxic.
- ☐ Secure garden beds: Use raised beds with hardware cloth or decorative fencing (minimum 24 inches tall) around lily beds if you choose to keep them.
- ☐ Train "leave it" command: Teach a reliable "leave it" using positive reinforcement — reward with high-value treats when your dog voluntarily moves away from plants. This is a backup layer, not a substitute for physical barriers.
- ☐ Check floral arrangements: When receiving or purchasing bouquets, inspect for lily stems. Request lily-free arrangements from your florist. Remove and dispose of any lily stems immediately upon bringing flowers home.
- ☐ Supervise outdoor time: Lilies are common in neighborhood landscaping. Keep your dog on leash or in a secured area during walks where lily beds are present.
- ☐ Save emergency numbers: Program ASPCA Poison Control (888-426-4435) and your nearest 24-hour emergency vet into your phone contacts now, before an emergency occurs.
Related Toxic Plants and Household Hazards
If you're concerned about lily toxicity, be aware of these other common household plants and substances that are toxic to dogs:
| Hazard | Toxic Compound | Primary Risk |
|---|---|---|
| Sago Palm | Cycasin | Acute liver failure (very high fatality rate) |
| Azalea / Rhododendron | Grayanotoxins | Cardiac arrhythmias, coma |
| Oleander | Oleandrin (cardiac glycoside) | Cardiac arrest (similar mechanism to Lily of the Valley) |
| Autumn Crocus | Colchicine (same as Gloriosa lily) | Multi-organ failure, bone marrow suppression |
| Xylitol (sugar-free products) | Xylitol | Rapid hypoglycemia, liver failure |
| Grapes / Raisins | Tartaric acid (suspected) | Acute kidney injury |
| Chocolate (dark/baking) | Theobromine | Cardiac arrhythmias, seizures |
Frequently Asked Questions
Are lilies poisonous to dogs?
Yes, many lily species are poisonous to dogs. The severity ranges from mild oral irritation (Peace Lily, Calla Lily) to life-threatening cardiac toxicity (Lily of the Valley) or multi-organ failure (Gloriosa Lily). True lilies (Lilium species) cause primarily gastrointestinal symptoms in dogs, though they are far more dangerous to cats. Any lily ingestion should be evaluated by a veterinarian.
How much lily can kill a dog?
The lethal dose depends entirely on the species. For Lily of the Valley, cardiac glycoside concentrations mean that ingestion of roughly 0.5 mg/kg of convallatoxin is toxic — this could be as few as 2–3 leaves for a small dog. For Gloriosa Lily, colchicine doses above 0.5 mg/kg carry a grave prognosis. For Peace Lily and Calla Lily, ingestion is uncomfortable but very unlikely to be fatal. Because concentration varies by plant, treat any ingestion as a potential emergency.
What are the symptoms of lily poisoning in dogs?
Early symptoms (within 30 minutes to 2 hours) include vomiting, diarrhea, drooling, and lethargy. More severe signs develop within 2–24 hours and may include cardiac arrhythmias, weakness, collapse, tremors, and seizures. With Gloriosa lily, a deceptive "recovery" phase may occur before life-threatening multi-organ failure sets in at 48–72 hours.
What should I do if my dog ate a lily?
Remove your dog from the plant, identify the species (take a photo or sample), and call your veterinarian or ASPCA Animal Poison Control at (888) 426-4435 immediately. Do not induce vomiting unless explicitly instructed by a professional. Transport your dog to a veterinary clinic as soon as possible, bringing the plant sample with you.
How long does it take for lily poisoning symptoms to appear?
Gastrointestinal symptoms typically appear within 30 minutes to 2 hours of ingestion. Cardiac symptoms from Lily of the Valley may develop within 2–6 hours. Colchicine toxicity from Gloriosa lily can follow a delayed pattern, with initial GI symptoms appearing within hours, a false recovery period, and then severe systemic symptoms at 48–72 hours post-ingestion.
Will my dog survive lily poisoning?
Most dogs survive mild lily ingestions (Peace Lily, Calla Lily, small amounts of true Lilium species) with prompt veterinary care. Survival rates for Lily of the Valley and Gloriosa Lily poisoning depend heavily on how quickly treatment begins — early decontamination within 1–2 hours dramatically improves outcomes. Delayed treatment significantly worsens the prognosis for these highly toxic species. Always consult your veterinarian for a case-specific assessment.
Beth Carrasco
All our authors care for dogs every day — read more of their work on the authors page.
