I bought a large clump of Heliosa at Collectors Corner about two months back. I just discoovered some of the pups on the base of the plant have dried up and died This is really wierd, it is the first time I've had any problem with a rebutia and I bought a fairly large and established plant.
I am going to ask tomorrow if any of the good staff are there but has anyone had this happen before?

I've occasionally had the odd pup die off, but I've not been able to figure out the cause.

Well I did find one of the good staff today and she told me I am underwatering Apparently if I'm top watering one lot of water is not enough, I need to give it at least three lots of water