Is Autumn Crocus Toxic to Cats and Dogs?

Q: Is autumn crocus toxic to cats?

Highly toxic to cats. Autumn crocus is extremely toxic to dogs and cats, even in small amounts. It can cause severe stomach upset, heart problems, and liver or kidney failure.

Q: Is autumn crocus toxic to dogs?

Highly toxic to dogs. Autumn crocus is extremely toxic to dogs and cats, even in small amounts. It can cause severe stomach upset, heart problems, and liver or kidney failure.

Colchicum autumnale

Cats

🔴 Highly toxic

Dogs

🔴 Highly toxic

Short answer: Autumn crocus is extremely toxic to dogs and cats, even in small amounts. It can cause severe stomach upset, heart problems, and liver or kidney failure.

Think your pet ate autumn crocus? Treat it as an emergency and call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.

Signs to watch for

Severe vomiting and diarrhea
Heart problems
Liver or kidney failure
Abnormal bleeding and bone marrow problems

Why it’s a problem

Toxic principle: Not specified in our source.

The ASPCA calls autumn crocus extremely toxic, even in small amounts.

Frequently asked questions

Is autumn crocus the same as spring crocus?

Our source covers autumn crocus (Colchicum autumnale). We haven’t reviewed spring crocus yet, so check with your vet or the ASPCA database.

Other plants

Sources

ASPCA: Do You Know Which Flowers and Plants are Toxic to Pets?

Last checked: 2026-11-11. General information, not veterinary advice.