My fishbone cactus is growing new sprouts but also rotting at the same time. I knew I needed to cut off the rotten stems but I didn’t know why this was happening. So I asked about this problem through a houseplant website.
A person said that if the cactus is experiencing cold temperature, they start to rot. Also water penetrating an open wound on the plant can cause rotting.
I put the fishbone cactus on a windowsill during the winter with the window open. I think that’s probably why it’s experiencing rotting. So my plant is stressed from the cold.
To save the rotten cactus, I cut all the rotten stems and took the plant out form the old soil and repot it with new soil.
It was growing one-sided so I also changed the positions to look even.
HaeunGarden 