Hey Richard,
I read your article on the pitaya and it said that it has seeds in the fruit. Is it possible to propgate a plant from the seeds??? Being in Canada it is highly unlikely that I'll be able to come across a cutting, but seeds on the other hand might just be a viable option to look into.
I love to grow plants that aren't supposed to grow in this climate and since my husband and I are into medievel recreation and ren fairs etc, a dragon fruit tree would fit just nicely into our weapons room
Sherry aka Lady Saphyra