How to grow dragon fruit well in northern greenhouses
The best time for planting in greenhouses is April to May each year. Plant dragon fruit at a spacing of 2 x 3 m between planting holes and rows, using cement posts as support; plant 1 plant in each of the 4 directions around each cement post. You can also plant 3-4 rows along the east-west direction of the greenhouse according to the greenhouse width. Dragon fruit likes high temperatures and fears low temperatures; its most suitable growth temperature is 25-35°C....
The best time for planting in greenhouses is April to May each year. Plant dragon fruit at a spacing of 2 x 3 m between planting holes and rows, using cement posts as support; plant 1 plant in each of the 4 directions around each cement post. You can also plant 3-4 rows along the east-west direction of the greenhouse according to the greenhouse width. Dragon fruit likes high temperatures and fears low temperatures; its most suitable growth temperature is 25-35°C. For relatively old and mature branches, concentrated high-intensity sunlight exposure over too long a time means the accumulated heat cannot dissipate, which may cause sunscald on that part. When water is insufficient or lacking, branches grow slowly, become thin and not robust, and flowering and fruiting will be delayed. Fertilizer should be mainly organic fertilizer, supplemented with a small amount of chemical fertilizer. For chemical fertilizer, a nitrogen-phosphorus-potassium compound fertilizer can be used. Water once a week (or twice a week in drought), and apply 250 grams of compound fertilizer per post once a month. To improve the fruit-setting rate, greenhouse cultivation, whether of the white-fleshed type or the red-fleshed type, generally requires hand pollination; simply dip a finger in pollen and smear it on the stigma. Alternatively, when the flowers are fully open, apply 100-200 ppm gibberellin to the base of the flower, which gives an even higher fruit-setting rate. The fruiting branches of dragon fruit are generally longer than 1.5 m and are in the reproductive growth period from April to November. Branches in the middle and upper parts and drooping branches are the most likely to bear fruit. Generally, cultivate 5 branches per plant; each batch will have about 3 branches bearing fruit, and the remaining 2 serve as non-fixed vegetative branches. After the production season ends, all old branches that have previously borne fruit should be pruned off. Dragon fruit is a fruit tree that requires no disease or pest control; from flowering to fruit ripening, no pesticide needs to be sprayed at all.
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