I was away for 2 weeks on vacation. I watered my cactus before I left and would water again after my 2 weeks. During the summer I only watered it twice a month. When I came home, I noticed that the main stem of the cactus had turned brown and looked like tree bark. Other branches were fallen off. This has never happened before. I have had this plant for 3 years and have been ferterlizing it. It was producing new leaves. How do I transplant these branches so that it can root and I can save my plant?
Here is a link that will help you with your plant.