Are Spring Crocus Toxic to Cats?

Crocus vernus

Spring crocuses contain low levels of alkaloids. Chewing the corm or flowers causes vomiting, diarrhoea and drooling, and most cats recover with supportive care.

The danger is the confusion with autumn crocus (Colchicum), which is far more toxic and flowers months later with no leaves.

Which parts are dangerous

• corms
• flowers
• leaves

What to watch for in the UK

• Carpets whole lawns in early spring.
• Corms lifted and left on paths during division.
• Squirrels move them around.
• If in doubt whether it is spring or autumn crocus, phone the vet.

If your cat has already chewed it

1. Watch for vomiting and diarrhoea.
2. Phone your vet if the cat is a kitten, elderly, or shows weakness.
3. Confirm which crocus it is if you can.

Take a photo of the plant, and a cutting if you can do it safely — identification is half of the vet's decision. Out of hours, use your practice's emergency number. This page explains risk; it cannot diagnose your cat and it contains no home treatments.

If your cat has vomited after eating a plant, see the cat vomiting guide and, if there is blood, vomiting blood. For a general red-flag checklist, use sick cat symptoms. If the worry is food rather than a plant, the can cats eat guide covers 36 everyday foods.

Related plants

Browse the full UK plant checklist (72 plants).