Hylocereus undatus
Dragon fruit, pitaya, pitahaya, thorn pear: it is not a tree but a climbing cactus, native to Central America, that clings to trunks with aerial roots. Its immense white flower opens for only one night — it is one of the most spectacular in the plant kingdom, and it has withered by early morning.
Characteristics:
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Climbing cactus: fleshy, triangular stems that cling using aerial roots and can reach several meters in length.
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One-night flower: an immense, fragrant white corolla, open from dusk to dawn, earning it the nickname “queen of the night.”
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Scaly fruit: bright pink skin, white flesh dotted with tiny black seeds, and a mild, refreshing flavor.
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Fast growth: easy to grow, it makes a spectacular houseplant.
Good to know before sowing:
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It freezes at 5 to 10 °C: in our latitudes, it must be grown in a pot, indoors, in a conservatory, or in a heated greenhouse. It can be taken outside in summer, during the warm season only.
- Allow 5 to 7 years before the first flowering for a plant grown from seed. In the meantime, it is a remarkable ornamental plant — but it is best to know this before sowing.
- It needs support: a trellis, sturdy stake, or coir totem, which it will cling to with its aerial roots.
- Many varieties are partially self-sterile: two separate plants significantly improve the chances of fruiting.
Sowing advice:
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Exposure: very bright, but without scorching direct sunlight behind glass — in nature, it grows in partial shade, clinging to trunks beneath the canopy.
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Soil: very well-drained, light, and airy: a half-and-half mixture of potting soil and coarse sand or gravel. It is an epiphytic cactus and will rot immediately in heavy or waterlogged substrate.
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Method: no stratification — this is a tropical species, and cold is harmful to it. Sow on the surface without covering; the seeds need light. Maintain at 25-30 °C in a mini greenhouse with constant humidity. Germination is quick: 1 to 3 weeks. See how to sow your seeds.
Planting advice:
- Transplant individually into pots when the seedlings reach 3 to 5 cm, taking care: they are fragile at first. Choose a wide, shallow pot, as its roots remain close to the surface.
- Install the support as soon as the stem exceeds 30 cm.
Care advice:
- Water moderately, allowing the substrate to dry between waterings — excess water is the leading cause of death. Reduce watering considerably in winter, when the plant goes dormant.
- Never let the temperature fall below 10 °C. Feeding with cactus fertilizer in spring and summer supports its growth.
- Prune overly long stems to encourage branching: flowers appear on well-matured stems.
Harvesting advice:
- If your plant flowers and bears fruit, harvest about one month after flowering, when the skin is deep pink and the scales are beginning to dry at their tips.
- Hand-pollination with a paintbrush on the evening the flower opens significantly increases the chances of fruit set indoors.
Benefits for biodiversity:
- In its native habitat, its nocturnal flowers are pollinated by bats and moths — a fine example of adaptation to nocturnal pollinators, which is rare among cultivated plants.
- Growing it indoors offers an opportunity to discover an unusual plant lifestyle: that of epiphytic cacti.
Uses:
- Fresh fruit, cut in half and eaten with a spoon, in fruit salad, juice, or sorbet. Its flesh is mild and not very sweet.
- A striking ornamental houseplant, even without fruiting.
Symbolism:
Its name, “dragon fruit,” comes from the scaly appearance of its skin, which Asian tradition associated with the body of a dragon. In several Southeast Asian cultures, it is given as a sign of prosperity and good fortune.
Harvesting your own seeds:
Scoop the flesh from a ripe fruit, crush it in a little water, and rinse it several times on a fine sieve to separate the tiny black seeds from the pulp. Dry them flat on absorbent paper. Sow them promptly, as their germination potential declines over time. See how to store your seeds.
Commitment to Quality: at SemiSauvage - Permaculture, we grow and select our seeds with respect for living things as our guiding principle. Based near the Auvergne Volcanoes, we choose open-pollinated, non-hybrid varieties, tested for their germination rate, sorted, and carefully packaged without any chemical treatment. Our conviction: to give gardeners back the ability to resow, year after year, seeds that truly belong to them.
A climbing cactus whose flower opens for only one night.
