Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My dog ate Iron Cross Begonia - what should I do?
Begonia masoniana
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
Intense burning and irritation of the mouth, tongue, and lips, excessive drooling, vomiting, and difficulty swallowing.
Escalation note
Ingestion of plant material can lead to significant oral discomfort due to calcium oxalate crystals. Always consult a veterinarian if your dog has consumed this plant.
First aid at home
Take the plant material away and remove any leaf pieces still in your dog's mouth. Offer cool, fresh water to help rinse the crystals out. Do not induce vomiting unless a veterinarian or the ASPCA Animal Poison Control Center tells you to. Call (888) 426-4435 or your vet before giving anything else.
What to watch for
Most common: heavy drooling, head shaking or pawing at the muzzle, retching, and vomiting. Some dogs will refuse food for several hours. Watch for swelling around the mouth or throat that affects breathing — uncommon but serious. Bloody vomit or repeated unproductive retching warrants a same-day visit.
Time window
Onset is typically immediate — drooling and discomfort start within minutes of contact, because the calcium oxalate crystals irritate on touch. ASPCA does not publish a precise duration; oral signs usually settle within hours and GI signs within 24 hours.
When to call the vet
Call immediately if your dog dug up and chewed the tuber, or if you see facial/throat swelling, repeated vomiting, blood in vomit, or labored breathing. For a brief leaf chew with quick drool-and-spit and otherwise normal behavior, monitor for several hours. The ASPCA Animal Poison Control Center (888-426-4435) can advise based on amount eaten.
What this means for your dog
Dogs that chew Iron Cross Begonia foliage usually get a face full of irritation rather than systemic illness — the soluble calcium oxalate crystals release on contact and trigger drooling and vomiting. The most toxic part is underground: dogs that dig up and gnaw the tuber are at higher risk and can develop more pronounced GI signs. ASPCA does not classify begonia as life-threatening to dogs.
Sources: ASPCA.
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.