Yucca (3-Stem) One Stem Browning: Urgent Isolation of Healthy Stem

One of three Yucca stems brown/dying, one healthy. Cause unknown (insect, virus, fungus, frost).

Emergency Triage

1. Remove healthy green stem and repot alone.
2. Discard dying stems/soil (pathogen risk).
3. Save what you can. Green stem may root and regrow.

Note

Not a standard houseplant (outdoor/desert), but urgent action gives best chance. Frost exposure possible this season.

Focus on the living stem.