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Is Mountain Laurel Toxic to Dogs?

☠️ ToxicSeverity: Severe
✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit
⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.
Yes, mountain laurel is severely toxic to dogs. All parts contain grayanotoxins capable of causing heart failure and death.

Also known as: Spoonwood, Calico Bush · Kalmia latifolia

What makes it toxic

Grayanotoxins throughout the plant, which disrupt cardiac and skeletal muscle cell channels, dropping blood pressure and deranging heart rhythm.

Warning signs to watch for

Drooling, vomiting, repeated diarrhea, weakness, muscle tremors and slow or irregular heartbeat, sometimes leading to seizures and collapse.

What to do if your dog eats it

Go straight to an emergency vet with a sample of the shrub. Any confirmed chewing of leaves or flowers warrants immediate care, not watchful waiting.

Common questions

How much mountain laurel can kill a dog?

Small amounts have caused severe poisoning. The toxin load varies by leaf age and season, so no quantity should be treated as safe.

Is mountain laurel dangerous in winter when snow-covered?

Yes. Evergreen leaves stay toxic year-round and can be exposed when snow melts. Fence dogs away from these shrubs.

More plants checked for dogs

Pothos☠️ ToxicYes, pothos is toxic to dogs. Chewing any part of the vine releases calcium oxalate crystals thaAloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to dogs. The skin and latex layer of the leaf contain coSpider Plant✅ Non-ToxicNo, spider plants are non-toxic to dogs. A dog that nibbles the arching leaves is not at risk ofEaster Lily⚠️ Mildly ToxicEaster lilies are only mildly toxic to dogs — they usually cause stomach upset, not the fatal kiSago Palm☠️ ToxicYes — sago palm is severely toxic to dogs, with a documented fatality rate around 50% when untreBoston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to dogs. Chewing a frond will not poison your dog.

This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.