6in Dragon Fruit Cactus
Although dragon fruit plants enjoy warm weather and are often planted in full sunlight, too much intense sun in dry or especially hot regions can cause stem damage. If temperatures in your area are frequently near 100 degrees Fahrenheit, it's best to plant your cactus in a spot that boasts partial shade. Likewise, it's important to be aware that too much shade can result in less abundant fruit production and the quality of your harvest may not be as impressive.
Dragon fruit cacti are not terribly fussy when it comes to their soil type or pH level. The key is that their soil is moist, rich in organic matter, and well-draining. Cacti experts also recommend mulchingaround the base of the plant—especially in drier regions—to help the soil retain its moisture.
Don't make the mistake of thinking that because this plant is a cactus, you can slack on the watering front. While dragon fruit cacti do have some drought tolerance, in order to produce a good fruit crop, it's best to water them consistently from when they start producing their flowers until you harvest your dragon fruit crop. However, excessive watering can also result in root rot and various forms of fungal disease.2 During the winter and into early spring, give the plant a necessary dry spell to induce prolific flowering.
Temperature and Humidity
Dragon fruit plants are not suitable for every garden. Because they are native to tropical regions, they won't do well in areas that experience freezing weather, especially if that freeze is prolonged. Temperatures ranging from 65 degrees Fahrenheit to 80 degrees Fahrenheit at the highest are considered optimal growing conditions for dragon fruit cacti.
Dragon fruit cacti are rather hungry plants, and feeding them every couple of months during their first year, using a balanced 20-20-20 fertilizer, is recommended. Once the plants are well-established, they should do fine with just a few applications of fertilizer annually. You should also plan to amend the soil with compost or organic matter a couple of times a year, too.