Trees

Royal poinciana

Delonix regia

With its umbrella-shaped crown covered in orange-red flowers, the royal poinciana is considered one of the most spectacular and colourful trees of the tropical world.

Characteristics

Scientific nameDelonix regia
Heightfino a 12 m
SunlightFull sun
WaterModerate, drought-tolerant when mature
SoilWell-drained, adapts to various soils
ToxicitySeeds toxic if eaten
GrowthFast, very wide crown
TemperatureTropical, fears frost
FloweringMay, Jun, Jul
IrrigationModerate, avoiding waterlogging

A tree ablaze with colour

The royal poinciana is a medium-sized tree of overwhelming beauty. Its crown is wide and flattened, shaped like a great umbrella or parasol, offering dense shade. Its leaves are delicate and feathery, bipinnate and fern-like, of a bright green. But it is the flowering that makes it famous: in summer the tree covers itself with a cloud of large flowers with vivid orange-red petals, so abundant as to almost entirely hide the leaves and to earn it the reputation of one of the most colourful trees on the planet. After flowering it produces long woody pods.

Origin and distribution

It is native to Madagascar, where it grows in dry deciduous forests. Thanks to its extraordinary beauty, it is now cultivated as an ornamental tree in much of the tropical and subtropical regions of the world, where it adorns avenues, parks and gardens.

Cultivation and care

The royal poinciana loves warm climates and full sun, essential for an abundant flowering. It prefers well-drained soils and, once well established, tolerates periods of drought well. It has a fairly rapid growth and develops a very wide crown, so it needs space. It fears frost: it does not tolerate intense cold, which limits its cultivation to mild climates or greenhouses in temperate areas. It should be watered moderately, avoiding waterlogging.

Curiosities and uses

In many tropical cultures the royal poinciana is loved and used in various ways, from shading avenues to the use of its wood and pods. It is classified as a species of least concern globally, being very widespread in cultivation, although the wild populations native to Madagascar are more reduced. Note: the seeds contained in the pods can be toxic if eaten, so it is best to keep them away from children and animals.

Flowering season

JanFebMarAprMayJunJulAugSepOctNovDec

Practical tips

Watering

Water needs: Moderate, drought-tolerant when mature — always check soil moisture before watering.

Position

Prefers Full sun: provide the right light and rotate the plant for even growth.

Substrate

Recommended soil: Well-drained, adapts to various soils. Refresh the substrate every 1-2 years.

Leaves

Dust the leaves with a damp cloth to support photosynthesis.

Feeding

Feed during the growing season (spring-summer) and stop in winter.

Pros

  • Spectacular orange-red flowering
  • Umbrella crown giving excellent shade
  • Fast growth
  • Drought-tolerant when mature

Cons

  • Fears frost, only warm climates
  • Wide crown, needs a lot of space
  • Seeds toxic if eaten

FAQ

When does the royal poinciana flower?
It flowers in summer, when the tree covers itself with large orange-red flowers so abundant as to almost entirely hide the leaves. It is precisely this spectacular flowering that makes it one of the most colourful and admired trees of the tropical world.
Can it be grown in temperate climates?
Only with difficulty: it fears frost and does not tolerate intense cold. In temperate climates it can be grown in a pot and sheltered in a greenhouse during winter, or only in the mildest, frost-free areas.
Is the royal poinciana toxic?
The seeds contained in the long woody pods can be toxic if eaten. It is therefore best to keep them away from children and pets. The plant is, however, grown mainly as an ornamental and for shade.
How much space does it need?
It needs a lot of space: it develops a very wide, flattened umbrella crown, which gives dense shade but requires a suitable location, away from buildings and obstacles. It is perfect for avenues and large gardens.

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