Is autumn crocus toxic to dogs?
Autumn crocus contains colchicine, a toxin that blocks cell division. It can cause severe bloody gastrointestinal signs and later organ and bone marrow damage. It is different from the spring crocus, which is far less toxic. The toxic principle is colchicine, which stops cell division.
Toxic dose by dog weight
There is no reliable numeric toxic dose for autumn crocus in dogs, so we don't show a weight-band table — inventing one would be misleading. No safe dose. All parts are toxic; signs may be delayed and organ damage can follow days later. Smaller dogs (toy and small breeds) are generally at higher risk from any given amount.
Symptoms timeline
0–2 hours: often no signs yet, drooling, vomiting.
2–12 hours: bloody vomiting, bloody diarrhea, abdominal pain, shock.
12–72 hours: kidney or liver damage, bone marrow suppression, death in severe cases.
Go to the vet / call ASPCA Animal Poison Control (888) 426-4435 now if…
- Your dog ate any part of an autumn crocus, even if it seems fine
- There is any bloody vomiting or diarrhea
- You are unsure what or how much your dog ate
- Your dog is very young, old, pregnant or has heart, liver or kidney disease
First aid: do's and don'ts
Do:
- Move your dog away from the source and remove any remaining material from their mouth if it is safe to do so
- Keep the packaging, label or a sample/photo of what was eaten
- Note your dog's weight, the approximate amount and the time of ingestion
- Call your vet or a pet poison hotline right away
Don't:
- Never induce vomiting without veterinary advice — for some substances it causes more harm
- Don't give salt, hydrogen peroxide, oils or home remedies unless a vet tells you to
- Don't wait for symptoms if the substance is highly toxic
- Don't give human medicines to treat symptoms
How vets treat autumn crocus exposure
Treatment depends on the amount, time since ingestion and your dog's signs. It may include decontamination when appropriate, activated charcoal for some toxins, IV fluids, medications to control signs, and monitoring. Bring the packaging so your vet can tailor treatment.
Prognosis
Most dogs treated early do well. The outlook depends on the dose, how quickly care begins, and your dog's overall health. Severe or delayed cases carry a more guarded prognosis.
What to do now
Call your veterinarian or an animal poison-control service for exposure-specific advice. Dog poison control: phone numbers, fees and when to call.