The dragon fruit cactus is a vine that blooms only at night and is pollinated by night creatures, such as moths and bats. Dragon fruit, also known as pitaya or pitahaya fruit, are large and bright pink, with white or red flesh. The fruit can be eaten fresh, by slicing it open and scooping out the flesh, can be added to other ingredients for fruit salad, and can be squeezed for juice. Originally introduced into Thailand from Vietnam, it is now widely grown all over the country and is known as geow mangon.
Cut a 6- to 12-inch piece of stem from the Thai dragon fruit cactus. It should be at least 2 inches in diameter. Cut this cutting into 3-inch pieces.
Dip the cut ends of the cuttings into fungicide, and lay them in a dry, shady location for one week. The cuttings will begin to send out roots during this time.
Fill planting pots with cactus mix, and moisten it until the excess water drains from the bottom of the pot. Allow the pot to drain for one hour.
Use your fingers to create planting holes and insert the cuttings into the potting mix. Pack the soil around the roots, and place the pots in a bright area but out of direct sunlight.
Allow the soil to dry out completely before watering again.
Increase the amount of sunlight the Thai dragon fruit receives after one week in the pot. Allow the cutting one hour of sunlight and then increase this time, gradually, over the next two weeks.
Transplant the dragon fruit cutting into its permanent location when it has begun new growth.