Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Clematis - what should I do?
Clematis spp.
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Drooling, vomiting, diarrhea, and oral irritation.
Escalation note
Ingestion typically causes gastrointestinal distress. If your cat has consumed any part of this plant, please contact your veterinarian for guidance.
What to watch for
Drooling, pawing at the mouth, vomiting, and diarrhea. Oral redness or small mouth ulcers can show up after a real chew. Most cats stop eating the plant well before they swallow much.
Time window
Not precisely documented. In practice, oral irritation begins within minutes of chewing; GI signs typically appear within an hour and resolve in 12–24 hours with supportive care.
When to call the vet
Call your vet or ASPCA Animal Poison Control (888-426-4435) if drooling lasts more than a couple of hours, if vomiting or diarrhea repeats, or if your cat refuses food or water for more than a few hours.
What this means for your cat
Most cats taste clematis once and stop — the leaves contain protoanemonin, an irritant glycoside that produces an unpleasantly stinging mouth feel. ASPCA classifies clematis as toxic to cats, but reactions are usually mild GI and oral irritation rather than systemic poisoning.
Sources: ASPCA (no first-aid guidance), NC State Extension.
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.