Five things to do in the garden this week: Fruit. Dragon fruit or pitahaya is produced on a night-blooming, vining cactus, and may be grown as far north as Granada Hills and anywhere east, west, or south of there. Dragon fruit is divided into Hylocereus or Selenicereus species. The former have overlapping flaps of smooth skin that are red, pink, magenta, or white and pulp that may occur in any of these colors, while the latter have a yellow, thorny skin and white pulp only.