The most popular dragon fruits varieties are red and white. However, of late other varieties are in demand. I manage to propagate yellow dragon variety- about 2000 cuttings . Only the skin is yellow, the flesh is white and very sweet. Except the seeds are a little bit bigger than the two varieties. The plant is slender and the thorns are a bit smaller.
The above pic shows the shape of yellow dragon fruits and how the dragon fruit cuttings are rooted in small polybags. They are nutured , watered and looked after.