Is Mountain Laurel Toxic to Dogs and Cats? (2026)
Kalmia latifolia
Advertisement
Quick facts
| Toxic to dogs | Yes |
|---|---|
| Toxic to cats | Yes |
| Toxic to horses | Yes |
| Toxic component | Grayanotoxins |
| Onset of symptoms | Within a few hours |
| Indoor / outdoor | outdoor |
If your pet ate this plant
Both lines are staffed 24/7. A consultation fee applies to each. Do not wait for symptoms to appear before calling.
Advertisement
Symptoms in dogs
- Drooling
- Vomiting
- Weakness
- Abnormal heart rate
- Collapse
Symptoms in cats
- Drooling
- Vomiting
- Weakness
- Abnormal heart rhythm
Symptoms in horses
- Colic
- Weakness
- Abnormal heart rhythm
Advertisement
What to do
Treat as an emergency — grayanotoxins affect heart rhythm and can progress quickly even if the pet seems fine initially.
Toxic component and mechanism
The toxic component in Mountain Laurel is grayanotoxins.
What makes this plant different
Mountain Laurel shares its grayanotoxin mechanism with Azalea, Lambkill, and Fetter Bush — all Ericaceae relatives with the same disproportionate cardiac danger. It's a common native understory shrub in Eastern US forests, making unsupervised hiking or backyard access a more likely exposure route than for typical ornamental plants.
Plant identification
- Scientific name
- Kalmia latifolia
- Family
- Ericaceae
- Also known as
- Mountain Laurel
- Typically found
- outdoor
Pet-safe alternatives
Advertisement
Related plants
Andromeda Japonica
Pieris japonica
Azalea
Rhododendron spp
Black Laurel
Leucothoe spp.
Bog Laurel
Kalmia poliifolia
Dog Hobble
Leucothoe sp.
Last verified: July 2, 2026 · Cross-referenced with ASPCA Animal Poison Control