Ficus Tree Leaf Drop and Fungus Gnats: Dry-Out, Fertilizer, and Light

Two Separate Issues

1. Leaf drop: Usually light change shock + possible overwatering in self-watering pot.
2. Tiny flies: Fungus gnats breeding in constantly moist self-watering reservoir.

Self-Watering Pot Problem

These pots keep soil constantly moist—ideal for gnats, risky for ficus roots. Ficus prefers a dry-down period.

Immediate Action

1. Stop self-watering. Remove reservoir. Water manually when top 1–2 inches dry.
2. Building-wide dry-out: All plants dry completely → water → dry completely → water → then normal schedule. Kills gnat cycle.
3. Light: Move to brightest window (south/west). Ficus needs high light.
4. Fertilize: Liquid Miracle-Gro at half strength monthly (spring–fall).
5. Water: Distilled/rain water if tap water is hard/fluoridated.

Summer Outdoors?

Yes, move outside (in its pot) when nights >55°F. Place in morning sun / afternoon shade. Acclimate 7–10 days. Bring in before frost. This often triggers vigorous regrowth.

White Spots on Leaves

Could be mineral deposits from tap water (use distilled) or minor fungal spots (improve air flow, avoid wet leaves).

Long-Term Success

• Manual watering with dry-down.
• High light.
• Regular fertilizer.
• Pure water.
• Annual summer vacation outdoors.

Your ficus will recover its canopy. The gnats will vanish with the dry-out protocol. The self-watering pot was the hidden villain.