Is Tomato Plant (Leaves and Stems) Toxic to Dogs?
Tomato plants (leaves, stems, and unripe green tomatoes) contain tomatine and solanine, glycoalkaloids that are toxic to dogs. Ripe red tomatoes contain very low levels and are generally safe, but the green parts of the plant can cause serious gastrointestinal and cardiac symptoms. If you suspect your dogs has ingested tomato plant (leaves and stems), contact your veterinarian or nearest emergency vet clinic immediately.
✓ You're doing the right thing by checking — Tomato Plant (Leaves and Stems) is toxic to dogs, and acting quickly can make a real difference. You did the right thing by looking this up.
If Your Pet May Have Ingested Something Toxic
Contact your veterinarian or nearest emergency vet clinic immediately. Do not wait for symptoms to appear — early intervention significantly improves outcomes.
| Toxic? | Severity | Time to Onset | Commonness | Urgency |
|---|---|---|---|---|
| Yes | Moderate | 2-8 hours | Common (garden exposure) | Urgent |
The Toxic Principle
The dangerous compound in Tomato Plant (Leaves and Stems) is Tomatine and Solanine (glycoalkaloids).
Tomato plants (Solanum lycopersicum) are members of the nightshade family. The green parts contain tomatine, a glycoalkaloid that disrupts cell membranes and inhibits cholinesterase. Solanine, another glycoalkaloid, causes similar effects. Concentrations are highest in leaves, stems, flowers, and green unripe fruit. As tomatoes ripen, tomatine is rapidly metabolized and red ripe fruit contains negligible amounts. The plant also contains atropine-like compounds that can cause anticholinergic effects.
How Much Is Dangerous?
The risk depends on your dogs's weight and the amount ingested.
| Pet Weight | Dangerous Amount | Expected Severity |
|---|---|---|
| Small dog (under 10 lbs / 4.5 kg) | A few leaves or small green tomatoes | Severe |
| Medium dog (25-50 lbs / 11-23 kg) | Several leaves or stems | Moderate |
| Large dog (50-90 lbs / 23-41 kg) | Significant plant material | Mild |
| Any size dog | Ripe red tomatoes | Safe |
Symptoms to Watch For
Symptoms of tomato plant (leaves and stems) poisoning in dogss typically progress through these stages:
Early Signs
2-6 hours- Vomiting
- Diarrhea
- Drooling
- Loss of appetite
- Abdominal pain
Progressive
6-12 hours- Weakness
- Confusion
- Dilated pupils
- Slow heart rate
- Tremors
Severe (rare)
12-24 hours- Severe cardiac arrhythmia
- Respiratory depression
- Seizures
- Coma
- Death (very rare)
You just learned the symptoms. Now be ready for them.
The #1 regret pet owners have after an emergency? "I wish I'd been prepared."
You care enough to research this — that puts you ahead of most pet owners. But research without preparation is just worry. This guide covers exactly what to do in the first 15 minutes after poisoning — the window that determines whether your dogs lives or dies.
Get the First Aid Guide — Protect Your Dogs →
Be Ready If This Happens to Your Dogs
You just read what tomato plant (leaves and stems) does to dogss. The symptoms. The suffering. The $100–$1,500 vet bill. The question is: are you prepared if it happens again?
Get the Emergency Kit — Be Ready →What to Do Right Now
- 1 Remove your dog from the tomato plants and remove any plant material from their mouth.
- 2 Call your veterinarian for guidance — most cases are mild but need monitoring.
- 3 Rinse your dogs mouth if they were chewing on leaves.
- 4 Note how much plant material was consumed.
- 5 Watch for vomiting, diarrhea, or lethargy over the next 12 hours.
- 6 If symptoms develop or a large amount was eaten, get to a vet clinic.
Treatment and Recovery
Most cases of tomato plant ingestion are self-limiting and require only supportive care. For significant ingestions, treatment includes inducing vomiting (if recent), activated charcoal, IV fluids for dehydration from vomiting/diarrhea, and anti-emetics. Cardiac monitoring is needed if large amounts were ingested. Prognosis is generally excellent with supportive care.
Estimated Cost
$100 – $1,500
💰 Vet bills like this can bankrupt a family. Pet insurance covers poisoning emergencies.
Compare Pet Insurance Plans →$100
minimum vet bill
A basic first aid kit costs a fraction of an emergency vet visit
Having basic first aid supplies and an emergency reference on hand is something most veterinary professionals recommend.
Get the Kit — →
Why Tomato Plant (Leaves and Stems) Is Dangerous for Dogs
Dogs are vulnerable to tomato plant (leaves and stems) because they metabolize Tomatine and Solanine (glycoalkaloids) differently than humans. While dogs are generally more resilient than cats, the compound can still cause significant health issues depending on the dose consumed.
Tomato plants (Solanum lycopersicum) are members of the nightshade family. The green parts contain tomatine, a glycoalkaloid that disrupts cell membranes and inhibits cholinesterase. Solanine, another glycoalkaloid, causes similar effects. Concentrations are highest in leaves, stems, flowers, and green unripe fruit. As tomatoes ripen, tomatine is rapidly metabolized and red ripe fruit contains negligible amounts. The plant also contains atropine-like compounds that can cause anticholinergic effects.
Other Substances to Watch For
If your dogs got into tomato plant (leaves and stems), be aware of these related hazards that often appear in the same contexts:
Expected Veterinary Costs
Based on typical veterinary treatment for tomato plant (leaves and stems) toxicity in dogs, including:
- •Veterinary examination
- •Decontamination and supportive care
- •Monitoring and follow-up
Actual costs vary by location, clinic, and severity of the case. Emergency clinics typically charge more than daytime veterinary offices.
Frequently Asked Questions
Can dogs eat ripe tomatoes?
Yes, ripe red tomatoes are safe for dogs in moderation. The toxic glycoalkaloids are present primarily in green, unripe fruit and the leaves/stems of the plant. Ripe tomatoes contain only trace amounts.
What if my dog ate tomato leaves from my garden?
Most dogs who nibble a few tomato leaves will experience only mild GI upset. However, larger amounts can cause more serious symptoms. Call your vet with details about how much was eaten.
Are cherry tomatoes dangerous?
Ripe cherry tomatoes are safe. The danger is from the plant itself (leaves, stems) and unripe green tomatoes of any variety.
People Also Ask
One more thing to check
Many dogs owners who worry about tomato plant (leaves and stems) also need to know about Is Chocolate Toxic to Dogs?. If your dogs had access to tomato plant (leaves and stems), they may have been exposed to other hazards too.
Related Dangers
🛒 Recommended for Every Pet Owner
Sources & Citations
Toxicity data is based on published veterinary toxicology references. In an emergency, contact your veterinarian or nearest emergency vet clinic immediately.
📚 Sources & Methodology
Toxicity data compiled from the following veterinary toxicology databases:
- • ASPCA Animal Poison Control Center — case data and species-specific toxicity ratings
- • Pet Poison Helpline — dosage threshold data and symptom timelines
- • Merck Veterinary Manual — clinical treatment protocols
Weight-based severity thresholds are calculated using established veterinary toxicology formulas. All "toxic" and "non-toxic" classifications are based on peer-reviewed veterinary literature. Last reviewed: May 2026.
Medical Disclaimer: The information on this page is for educational purposes only and is not a substitute for professional veterinary advice. If you suspect your pet has been poisoned, contact your veterinarian or nearest emergency vet clinic immediately. This page was last reviewed on 2026-05-22.
Sable T. Thornwood
Pet Toxicity Researcher
Sable T. Thornwood has spent over a decade researching pet toxicity and companion animal safety, with a focus on common household substances, plants, and foods. Her research draws on veterinary toxicology databases, ASPCA case records, and peer-reviewed clinical literature to help pet owners make informed, timely decisions during potential poisoning events.
About Sable & PetToxCheck