Yucca Cane Rot and Fungus Gnats: Rescue Steps for a Soft Trunk

Diagnosis

Soft trunk = rot from overwatering. Fungus gnats breed in decaying roots. Immersing the pot in water worsened the problem.

Immediate Actions

1. Light: Move to the sunniest window (uncovered, dawn to dusk).
2. Soil: Must be fast-draining cactus/succulent mix in a pot with drainage holes.
3. Water: Only when soil has been bone-dry for 3 days. Empty saucer after 1 hour.

Dealing with the Soft Trunk

• If soft all the way through: saw it off below the soft section. It will not recover.
• If firm above the soft part: cut off the rot, strip lower leaves, dip in rooting hormone, plant in sandy mix in a separate pot. Root in bright light.

Bug Control

If gnats return, water with 70% isopropyl alcohol (saturate soil) instead of immersing. Let drain overnight.

Long-Term

Yuccas are desert plants. Treat them like cacti: intense light, minimal water, excellent drainage.