How to save my Sulcorebutia
Today I found a rotten place in my grafted Sulcorebutia...how can I save it ...i heard something about lime powder but I don't know how to use it nor where to get it !!!
recently many of my cacti have rotten I don't know why but I lost my Gymnocalycium mihanovichii and Sempervivum because of rottenness....but I still wondering how did the rot affect my Sulcorebutia without it being touch soil surface and why does it grow vertically more than usual ?
thanks to everyone ...