Is Begonia Toxic to Cats?
Also known as: Wax Begonia, Tuberous Begonia, Rex Begonia · Begonia spp.
What makes it toxic
Soluble calcium oxalates concentrated in the tuber and roots, plus oxalate crystals in the foliage. Soluble oxalates are absorbed and irritate the mouth and kidneys in quantity.
Warning signs to watch for
Drooling, vomiting, oral irritation and difficulty swallowing within a few hours. Tuber ingestion adds more intense GI signs.
What to do if your cat eats it
Remove plant material, rinse the mouth and offer water. Call your vet for persistent vomiting, and treat any known tuber chewing as a prompt vet visit.
Common questions
Are begonia flowers toxic or just the leaves?
The whole plant contains oxalates, but the tuber is the most concentrated part. A cat that dug up and chewed the tuber needs a vet call even if it looks fine at first.
Are all begonia types (wax, rex, tuberous) toxic?
Yes, all share oxalates. The tuberous types carry the extra risk of a large underground tuber that pets can dig up.
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.