Saving Dragon Fruits Plant

I was quite thrilled to find this red flesh dragon fruit sold at the Lowe nursery.      Ever since I tried making the dragon fruit frozen mousse, I tried to purchase them at the market a couple of times, but they are so expensive and always in poor condition.      When I planted this dragon fruit plant, I thought the location was perfect for it.         I grew through the late spring and into summer, but alas, it got attacked by the fungus disease.      After treating it with copper spray, the ultimatum was cut off the bad rotted spots.     I did what I could, and now the rest is up to itself.