Yucca soft cane

A wet-soft, hollow, or collapsing cane is damaged tissue. Remove the plant from wet mix and inspect how far softness extends; fertilizer or another watering cannot restore it.

Root a healthy section if one remains

With cleaned tools, take a sound leafy top cutting beyond all soft tissue. Discard the rotten base and mix. Let the cut surface dry and seal, then place its lower cut end into a small pot of lightly moist, freely draining propagation mix, keeping the leafy end upright. The RHS yucca guide describes the stem-cutting method.

Keep warm in bright indirect light while roots form, using only enough water to prevent the propagation medium from drying out completely. If no firm section remains, there is no sound cutting to save.