Dogs
Potentially toxicConsulted references classify the plant as toxic or irritating for that pet type.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
dog safety reference
Is Iron Cross Begonia safe for dogs?
Begonia masoniana
Begonia masoniana is a popular ornamental houseplant known for its textured, puckered leaves featuring a distinct dark brown cross pattern. It contains soluble calcium oxalates that can cause irritation if ingested by pets.
Begonia masonianaIron Cross Begonia
- Light
- Bright indirect light
- Habit
- Rhizomatous, clumping
- Care
- Moderate
Safety status
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.
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.
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.
Sources: ASPCA.
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Dogs — concern notes
Common signs
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.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
NC State Extension Plant Toolbox
botanical · 94% reliability
Begonia masoniana is a rhizomatous begonia prized for its foliage, but it is known to be toxic to pets.
Same dog verdict
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