Sometimes growing dragon fruit all the way to harvest can require quite a lot of artistry and luck. It is not too hard to get starting growing pitahaya cactus plants, but learning to grow pitahaya cactus all the way to fruit can be a challenge. It is not necessarily hard to start to grow pitaya cactus seeds, but growing pitaya cactus plants to fully mature and produce harvestable fruit is not so straightforward.
Growing Dragon Fruit / Growing Pitaya Fruit
Information on growing pitaya fruit plants from seeds and cuttings...