Why are leaves falling off your 2 year old scheffalara plant?

Leaves falling off your two-year-old Schefflera plant could be due to several factors, including overwatering, underwatering, or sudden changes in environmental conditions. Overwatering can lead to root rot, while underwatering can cause stress, both resulting in leaf drop. Additionally, exposure to drafts, low humidity, or inadequate light can also trigger leaf loss. It's important to assess the plant's care routine and environmental conditions to identify the cause.