Yes. Once I had a clump of Hahnii I bought that refused to grow even though I repotted it with fresh soil. After about a year I took it out again, cleaned off the original soil this time, and discovered rot on the roots. I divided the clump, cut off the rot, let the pieces dry out, repotted, and ended up several new Hahnii that grew.

Melissa

Another 'tip' for the hahnii types is to bottom water (set them in a saucer of water and let them soak up what they want/need) as I've found that moist soil near the crown of the plant is what most often causes rot.