Several factors can cause Pilea glauca to drop leaves: Overwatering: Excessive moisture can lead to root rot, causing leaves to turn yellow and drop. Ensure proper drainage and allow the soil to dry out slightly between waterings. Underwatering: Inadequate watering can cause the plant to become dehydrated, resulting in leaf loss. Check the moisture level regularly and water when needed. Lighting: Insufficient light or sudden changes in lighting conditions can cause leaves to drop. Ensure the plant receives adequate indirect light. Temperature and humidity: Extreme temperature fluctuations or low humidity levels can stress the plant and lead to leaf drop. Maintain stable conditions and provide sufficient moisture.