Indoor Yucca with Black Sap and Hollow Trunk: Overwatering

Indoor yucca in bright light shows yellowing leaves, leaf drop, and dark sap on a soft, hollow-feeling trunk. Classic overwatering leading to root/stem rot.

Immediate Correction

• Water only when top 1/4–1/3 of soil is dry (bright light) or 3/4 dry (low light).
• Use sub-irrigation (bottom watering) if possible.
• Never let pot sit in drainage water.

Trunk Issue

Soft, hollow trunk with sap indicates advanced rot. Separate the affected cane—remove it entirely to save the other two. Repot remaining canes in fresh, well-draining mix.

Leaf Film

Sticky, dusty film is likely honeydew + sooty mold from insects (check undersides). Treat with insecticidal soap if found.

Epsom Salt?

Magnesium sulfate can green up foliage but doesn't fix rot. Address watering first.