Queen of the Night

Epiphyllum oxypetalum,Dutchman's Pipe Cactus, Night-blooming Cereus

The Queen of the Night Cactus is a tropical, epiphytic cactus native to the rainforests of Central and South America. Unlike desert cacti, it grows on trees and has long, flattened, leaf-like stems (not true leaves). It is famous for its massive, dinner-plate sized, highly fragrant white flowers that bloom only for a single night, usually in the summer. It is a trailing or climbing plant that requires support.

Care Guide

LIGHT

  • Requires bright, indirect light to encourage growth and flowering.
  • Can tolerate some direct morning sun (East window).
  • Insufficient light will prevent blooming. Too much harsh sun will turn the stems yellow or red.

WATER

  • As a tropical epiphyte (like an orchid), it needs more frequent watering than a desert cactus.
  • Allow the top third of the soil to dry out completely between waterings.
  • Reduce watering significantly in the winter resting period.
  • It is sensitive to tap water chemicals, similar to orchids.

SOIL

  • Needs an extremely light, airy, and fast-draining potting mix that mimics its jungle habitat.
  • Use an orchid mix (bark/charcoal/perlite) or a highly aerated succulent mix. Avoid heavy garden soil.

GROWTH HABIT

  • Ideal conditions: High humidity (50%+), warm temperatures (65-80F), and bright, indirect light.
  • Growth rate & size: Growth rate is moderate to fast; it grows as a trailing, segmented vine that needs to climb or hang.

PROPAGATING

  • Propagates extremely easily from stem cuttings (segments of the flattened stem).
  • Cut a 4-8 inch segment, allow the cut end to callus (dry) for a week, and then plant it in a dry, gritty mix.
  • Cuttings are best taken in spring or summer.

PRUNING

  • Pruning is often necessary to control its large, sprawling size.
  • Cut back the longest stems to maintain shape.
  • Remove any old, woody, or damaged stems. Pruning does not harm blooming.

REPOTTING

  • Repot when the plant is root-bound, typically every 2-3 years.
  • Repot in the spring or early summer.
  • Use a heavy pot (terracotta) to anchor the top-heavy stems.

FERTILIZING

  • Feed heavily during the spring and summer growing season (monthly).
  • Use a high-phosphorus fertilizer (middle number higher) to encourage blooming.
  • Stop fertilizing in the fall and winter.

FLOWERING

  • Produces spectacular, large, highly fragrant white flowers that bloom only for a single night in summer.
  • Requires bright light and a cool, dry rest period (50-60F) in winter to set buds.
  • Buds usually form on older, mature stem segments.

TOXICITY

  • The Queen of the Night Cactus is generally considered non-toxic to humans and pets.

PRO TIPS

  • To maximize blooming, provide a cool, dry rest period in the winter and bright light throughout the year.
  • Flowers often appear on the edges of the flatter stem segments.
  • They look great in hanging baskets or trained up a sturdy trellis.

Variability in Care

This care guide applies generally to the Epiphyllum genus, but the main variations stem from the type of stem/leaf structure.

Flattened Stem Varieties

Examples: Epiphyllum oxypetalum (Queen of the Night), most hybrids.

  • Characterized by the broad, flat, leaf-like stems.
  • Most prolific bloomers and are easy to shape and manage.

Triangular Stem Varieties

Examples: Hylocereus undatus (Dragon Fruit Cactus) - sometimes mistakenly identified as Epiphyllum.

  • Have three-sided, woody, angular stems.
  • Are more vigorous climbers and require very sturdy support.
  • More tolerant of direct, intense sun than the flattened-stem types.

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