Is Crocus Toxic to Cats?

☠️ ToxicSeverity: Mild

✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit

⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.

Spring crocus is only mildly toxic to cats, but the look-alike autumn crocus is deadly — telling the two apart can be a life-or-death difference.

Also known as: Spring Crocus, Dutch Crocus, Crocus vernus · Crocus vernus (spring) — see warning on Colchicum autumnale

What makes it toxic

Spring crocus (Crocus vernus) contains mild GI irritants. The unrelated autumn crocus (Colchicum autumnale) contains colchicine, a mitosis poison that shuts down cell division and causes multi-organ failure.

Warning signs to watch for

Spring crocus: drooling, vomiting and diarrhea within hours. Autumn crocus: severe vomiting, GI bleeding, kidney and liver failure, bone marrow suppression within hours to days.

What to do if your cat eats it

If you are unsure which crocus it was, treat it as an emergency and call your vet or poison hotline immediately with photos. Spring crocus nibbles need only monitoring.

Common questions

How do I tell spring crocus from autumn crocus?

Spring crocus blooms with grassy leaves present; autumn crocus (Colchicum) flowers on bare stems with no leaves and blooms in fall. A plant ID app or photo to your vet resolves doubts.

Is autumn crocus really that dangerous to cats?

Yes — colchicine has no antidote and even small ingestions of Colchicum can be fatal. Any suspected autumn crocus chewing is a drop-everything ER situation.

More plants checked for cats

Pothos☠️ ToxicYes, pothos is toxic to cats. Chewing the leaves or vines releases sharp calcium oxalate crystal Aloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to cats. The gel is famously soothing for human skin, bu Spider Plant✅ Non-ToxicNo, spider plants are non-toxic to cats. They are one of the best houseplants for homes with cur Easter Lily☠️ ToxicYes — and this is one of the most dangerous plants a cat can meet. Every part of an Easter lily,Sago Palm☠️ ToxicYes — sago palm is severely toxic to cats and among the deadliest houseplants. Every part contai Boston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to cats — a classic choice for plant-loving cat households.

This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.