Thank you, Mandarin; I appreciate your help and timely replies. I'm going to try carving away the discoloured tissue...
Thank you very much. I read your link and looked around on-line, and cut it. Attached are two pictures. I know nothing about this, and so I am...
Hi, I have had the cactus pictured for 27 years. Last week, I noticed that the bottom had gone black. I would assume rotting, but it had not been...