Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Mountain Laurel - what should I do?
Kalmia latifolia
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Drooling, vomiting, diarrhea, loss of appetite, abdominal pain, tremors, and potential cardiac arrhythmias.
Escalation note
Ingestion is considered highly dangerous and potentially fatal. Please contact your veterinarian or an animal poison control center immediately if ingestion is suspected.
What to watch for
Vomiting, excessive drooling, and diarrhea are usually the earliest signs. Watch closely for weakness, tremors, irregular heart rhythm, or collapse.
Time window
Onset and duration are not given as specific numbers in the cited sources; clinical guidance treats grayanotoxin poisoning as time-critical.
When to call the vet
Call immediately — don't wait for symptoms to worsen. Mountain Laurel has caused severe arrhythmias and death in pets.
What this means for your cat
Mountain Laurel is highly toxic to cats. Even a small amount of leaves or flowers can deliver enough grayanotoxin to disrupt the heart and nervous system, so any suspected ingestion should be treated as an emergency rather than watched at home.
Sources: ASPCA, Pet Poison Helpline (no first-aid guidance).
Source references
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.