PupkeeperToxicEmergency
Is autumn crocus toxic to dogs?
Highly toxic. Autumn crocus contains colchicine, which can cause bloody vomiting, organ failure and death.
If your dog ate or touched this, call your vet or a pet poison line now
United States
Poison lines in other countries: United Kingdom, Australia, Canada, New Zealand
What to do now
- Call your vet or a pet poison line now.
- Take a photo of the plant or bring a piece in a plastic bag.
- Get help even if your dog seems fine; some signs can take days to appear.
Don't
- Don't make your dog vomit unless a vet tells you to.
Signs to watch for
- Vomiting, often bloody
- Diarrhea
- Shock or collapse
- Kidney and liver damage
- Breathing failure
- Bone marrow damage (low blood cell counts)
When signs appear: Within hours, but some signs can be delayed for several days
Why
Autumn crocus contains colchicine and other alkaloids, which can damage the gut, kidneys, liver and bone marrow.
Sources
- ASPCA Animal Poison Control: Autumn Crocus
- AKC: Poisonous Plants for Dogs
- Merck Veterinary Manual: Houseplants and Ornamentals Toxic to Animals
Guide reviewed 9 October 2026.
General information from the sources above, not a diagnosis. When in doubt, call your vet.