Sudden green leaf drop in a stable environment is unusual. To diagnose: check for trunk cracks, dry/crispy leaves, hard ball-like growths, drainage holes, watering method, water quality, pruning history. Photos help. One overnight soak could trigger root rot if drainage is poor. Systematic info gathering is essential before treatment.
Controlling Ficus Pests: Alcohol Spray and Systemic Options
Sticky Ficus Leaves: Honeydew from Insects, Not Transpiration
Diagnosing Severe Leaf Drop in a New Large Ficus Tree
Ficus benjamina Dropping Leaves: Light, Water, Pot Size
Saving a Ficus Tree from Leaf Drop and Root Problems
Scale Infestation on Ficus benjamina: Treatment and Renovation Pruning
Kumquat Green Leaf Drop: Overwatering Indoors After Outdoor Season
Ficus (Rubber Tree) Leaf Drop: Solving the Watering Paradox
Ficus Leaf Curl: Insect Pests and Fertilizer Mishap
Ficus Leaf Spot (Cercospora): Fungus Management Indoors
Indoor Ficus Leaf Drop: Scale, Light Change, or Root Bound
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