Reviving a Ming Aralia Bonsai After Overwatering and Repotting Mistakes

Why Your Ming Aralia Lost Its Leaves

A Ming aralia (Polyscias fruticosa) is a beautiful but sensitive bonsai subject. Sudden leaf drop is usually a stress response to one of three triggers: a sharp change in light or temperature, chronic overwatering, or chronic underwatering. A single heavy rainstorm won't cause root rot—root rot requires weeks of constantly soggy soil—but a single severe drought can kill roots outright.

Why Repotting and Copper Fungicide Made Things Worse

Repotting a stressed plant is the single most common mistake. Disturbing the root system when it's already compromised adds shock and often introduces root rot because the fresh soil holds too much moisture. Copper fungicide is not a cure for cultural problems and can further damage tender roots.

Assessing the Damage

Gently remove the plant from its pot. Healthy roots are firm and white or tan; rotted roots are brown, mushy, and smell sour. If any healthy roots remain, the plant has a chance.

Recovery Plan

• Light: Place the Ming in very bright, indirect light—right in front of an uncovered east or west window. No direct sun.
• Temperature: Keep it above 60°F (16°C) at all times. Avoid drafts.
• Watering: Water only when the top half-inch of soil feels dry. Add water until a little trickles out the drainage holes, then empty the saucer.
• Pot size: Keep it in the smallest pot that holds the root ball. Ming aralias prefer to be quite potbound.
• Patience: New growth may take months. Do not fertilize until the plant is actively growing and looks healthy.

If you can provide more details—exact light exposure, watering routine, how long it's been in the new pot—I can refine the advice further.