How do I treat the survived parts of a cactus after some of it has rotten to prevent the problem spreading?
I have a cactus consisting of three "cylinders" growing from the same center point. Recently one of the cylinders started rotting rapidly and I had to remove that part. While I was doing that the ...
I've had this pair of fairy castle cacti for several years now, and they've done fairly well. However, I noticed today that they have developed brown patches over most of their stems and a few areas ...