My weeping cherry trees leaves are turning yellow and falling off?

Yellowing leaves on weeping cherry trees can be indicative of several issues, such as overwatering, poor drainage, or nutrient deficiencies. It's essential to check the soil moisture and ensure the tree is not sitting in waterlogged conditions. Additionally, consider if the tree is receiving adequate nutrients, as a lack of nitrogen can lead to yellowing leaves. If the problem persists, inspecting for pests or diseases may be necessary.