Epiphyllum oxypetalum

🌵 Care at a glance
Light	Bright, indirect light; protect from harsh direct sun
Water	Regular in the growing season, letting the top of the mix dry; reduce in winter
Soil	Rich but free-draining epiphytic mix (see Soil and potting mix)
Temperature	Warmth-loving; protect from frost, USDA zones 10–11
Propagation	Stem cuttings (easy); seed
Toxicity	Generally considered non-toxic to cats and dogs

Epiphyllum oxypetalum, widely known as the queen of the night, is a night-blooming epiphytic cactus grown for its spectacular, sweetly fragrant white flowers that open for a single night and are usually wilting by morning. A vigorous climbing and sprawling plant with flattened, leaf-like stems, it is one of the most beloved of the orchid cacti and is also sold under the common names Dutchman's pipe cactus and night-blooming cereus.

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Description

Epiphyllum oxypetalum is a large, shrubby epiphyte that in time develops woody, cylindrical main stems from which arise long, flattened secondary stems. These flat stems are often mistaken for leaves — the plant has no true leaves — and are broad, strap-shaped and gently scalloped along the margins, with the areoles borne in the notches. Mature plants can become quite large and benefit from support as the stems lengthen and arch.

The flowers are the plant's great spectacle. Borne from areoles along the stem margins, each bloom is very large, funnel-shaped and pure white, with narrow reddish outer segments and a powerful sweet perfume. They open after dark, are typically at their peak in the middle of the night, and collapse within a few hours of daybreak — a single, fleeting display that gives the plant its common name. Flowering is most common in the warmer months, and an established plant may open several blooms on the same night.

Distribution and habitat

The species is native to the American tropics, ranging from southern Mexico through Central America and into northern South America, where it grows as an epiphyte in humid, shaded forest, rooting in leaf litter and mossy pockets on tree branches rather than in the ground. From this habit come its cultivation preferences: warmth, humidity, dappled light and a loose, organic-rich rooting medium that never stays waterlogged. It is now grown as a houseplant and garden subject throughout the warm parts of the world, and has naturalised in some tropical regions.

Cultivation

Unlike the desert cacti, E. oxypetalum is a forest plant and appreciates more water, more humidity and less direct sun than its ground-dwelling relatives. Grow it in a rich but free-draining epiphytic mix — for example a blend based on bark, coir and perlite — in bright but filtered light. Harsh midday sun can scorch the flat stems, while too much shade produces weak, floppy growth and few flowers.

Water regularly through the growing season, allowing the surface of the mix to dry between waterings, and feed occasionally with a balanced or slightly potassium-rich fertiliser to encourage blooming. In winter, keep the plant cooler and much drier; a cool, dry rest period is widely held to improve flowering the following season. Protect it from frost at all times. The stems are brittle and heavy, so a stake, trellis or hanging position helps support the arching growth. See Watering and Repotting for general technique; plants often flower better when a little pot-bound.

Propagation

The easiest method by far is stem cuttings. Take a section of a healthy flattened stem, let the cut end callus for several days in a shady spot, then insert it shallowly into a gritty, free-draining mix and keep it barely moist until roots form. Cuttings root readily in warm conditions. The species can also be raised from seed, though seedlings are slower to reach flowering size. See Propagation — cuttings for a full walkthrough.

Common problems

Failure to flower — usually too little light, or the lack of a cool, dry winter rest; very young plants also simply need time to mature.
Rot — from a soggy, poorly draining mix or overwatering in cool weather; stems yellow, soften and collapse.
Stem scorch — pale, bleached or corky patches where flat stems catch harsh direct sun.
Pests — mealybugs (white fluff in the areoles), scale and, in dry air, spider mites. See Pests and diseases.

References

Horticultural information for growing these plants as ornamentals. Always confirm plant identification and any handling, grafting, or safety advice against authoritative sources before acting.