I have this Ponytail which I moved from a pot into the ground about 6 months ago. Since the move, I've noticed something strange happening in the 'bulb' (caudex?). The outer layer (~7mm deep) seems to have rotted out, however the bulb beneath the rotted layer still feels very firm and the foliage looks healthy as pictured below.
It's in a very well drained area, so I can't imagine why there would be any rot, and I've planted several other Ponytails from pots into the ground in the past, with no issues whatsoever.
I just want to make sure there is no further rotting. Has anyone seen this before:
Any input would be most appreciated.