Question: is a dieffenbachia plant poisonous to humans?
Answer: Toxicity. The cells of the Dieffenbachia plant contain needle-shaped calcium oxalate crystals called raphides. ... With both children and pets, contact with dieffenbachia (typically from chewing) can cause a host of unpleasant symptoms, including intense numbing, oral irritation, excessive drooling, and localized swelling.