Ruby Ball Cactus Rotting
Just a couple of weeks ago, I noticed that my Ruby Ball Cactus
was starting to turn pale and the green was turning yellow. Then I noticed that a part of the 'ball' was turning brown, this over a matter of time spread to the main ball. If this continues to spread to I have to cut all of them off? I put some fertilizer into the soil today too. I'm pretty sure that it's from the direct sunlight. The green stem feels a bit mushy.
What do I do now? Is it too late?