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Is Coreopsis Toxic to Cats?

⚠️ Mildly 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.
Coreopsis is widely regarded as safe for cats and has no documented poisonings, but it lacks a formal non-toxic listing, so treat grazing as low-risk rather than risk-free.

Also known as: Tickseed, Calliopsis · Coreopsis spp.

What makes it toxic

No documented toxin for cats. Minor irritant compounds in the daisy-like foliage could cause mild stomach upset if eaten in bulk.

Warning signs to watch for

At most: a vomit or soft stool after a real meal of leaves. No serious signs are documented.

What to do if your cat eats it

No specific action needed after a nibble. Offer water, monitor, and call your vet only if vomiting persists.

Common questions

Can I plant coreopsis in a cat-safe garden?

It is a common pick for pet-friendly gardens because of its clean record. Just remember the listing gap — no documented cases is not the same as formal clearance.

Why is my cat vomiting after eating coreopsis then?

Most likely simple fiber upset from bulk plant material, which happens with any greenery. It should pass quickly; call the vet if it does not.

More plants checked for cats

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.