Pitaya fruit

I’m pretty sure all the species of dragonfruit have been placed in Hylocereus now. Pitaya and pitahaya are just different spellings of the same name, which can be used for any of the species. Here’s a summary from a scholarly article:

Dragon fruit (Hylocereus spp.), also known as Pitaya or Pitahaya belonging to the family Cactaceae, is an most important tropical fruit crop as it is rich in antioxidants (a source of vitamins and minerals, prevent cancer, diabetes, cardiovascular, respiratory, gastrointestinal and urinary diseases), as well as dietry fiber and low in calories. It has drawn worldwide attention owing to its new flavour, colour and attractive appearance along with their enormous health benefits. It gained great commercial potential in India by consumer preference for new and exotic phyto-chemically rich nutrient fruits and its adaptability to new environment with abiotic stress tolerance like drought and temperature extremes. Although 14 Hylocereus spp. reported in worldwide, only four species such as H. undatus, H. monocanthus (Syn. H. polyrhizus), H. costariscensis and H. megalanthus (Syn. Selenicereus megalanthus) are mostly cultivated in different parts of the world.

https://www.nature.com/articles/s41598-021-81682-x

I have been documenting my effort to grow the yellow pitaya (H. megalanthus) in my greenhouse, but they don’t seem to like the long cold winter. Only one of the seedlings I started has made it through both of the last winters without dying to the ground:

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