Are all schefflera plants poisonous to cats and dogs?
—Amanda C. Plants of the genus Schefflera contain fine, needle-like calcium oxylate crystals within the plant cells. If ingested, these crystals can cause significant mechanical irritation and swelling of the oral tissues and other parts of the gastrointestinal tract. Based on this, it is advisable to keep Schefflera species out of your pets’ reach.