Dragon Fruit (also known as Pitahaya or Pitaya) is a tropical fruit that originated This is the beginning of the harvest season which should run. Photo: Dragonfruit. This climbing cactus is one of the most beautiful and widespread members of the Cactaceae family. The magnificent night-blooming white. Warm weather and moist soil can increase the fruit-bearing season of a dragon fruit plant. In an area where temperatures remain above 80 degrees Fahrenheit.