Schefflera Leaf Rot After Repotting: Causes & Solutions

Follow-up: The leaves are rotting off at the stem attachment—mushy and black. I repotted into the same pot with fresh soil after three years. It grew well initially with lots of new growth, but now has this leaf drop. No pests, watering unchanged, plant hasn't moved. Can't find anything describing this problem.

Original Question: Schefflera dropping leaves that appear rotted at the stem. Repotted 4 months ago just to refresh medium, checked for root-binding. Same watering, fertilizer, location, plenty of new growth. What causes leaves to rot off?

Expert Advice

The symptoms, timing, and sequence strongly suggest the problem began with the repotting.

Why Soil Replacement Is Risky

• Root disturbance: Replacing soil stresses the plant and damages roots, making them vulnerable to pathogens.
• Pathogen introduction: New soil may carry bacteria or fungi that infect damaged roots. Without lab analysis, the exact pathogen is unknown.
• Moisture imbalance: New soil may retain more moisture than the old mix, while recovering roots use less water. If watering hasn't been reduced, roots may rot. Ensure the top quarter of soil dries between waterings.

The healthy new growth suggests the plant is recovering from repotting stress. If leaf loss doesn't gradually stop, a deeper issue exists. Have I convinced you that soil replacement is generally a bad idea?

Regards,
Will Creed, Interior Landscaper
Horticultural Help, NYC
wcreed@HorticulturalHelp.com