SelecTree: Tree Detail

ROYAL POINCIANA
Delonix regia

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Photo Locations: Kauai, HI, Waimea Valley Botanical Gardens - Waimea, HI and Haiku Palms - HI

General Notes

This spectacular flowering tree is one of Hawaii’s most common and widely grown ornamental trees. From spring through summer and into early fall its flat, umbrella-shaped canopy is laden with large five-petaled, bright red flowers, especially in leeward, drier areas of the Islands. After pollination, brown legumes develop that are often over a foot long. Introduced to Hawaii in the mid 19th century, this species is particularly common in Honolulu, the Manoa Valley, and at the University of Hawaii. A wide spectrum of flower colors are available, from golden yellow to deep scarlet, and every shade of orange in between. Delonix regia has a HPWRA (Hawaii Pacific Weed Risk Assessment) score of -1 (Low Risk), and the Plant Pono link is: https://plantpono.org/pono-plants/delonix-regia/.

Native to Madagascar.

Family: Fabaceae

Additional Common Names

ROYAL POINCIANA, FLAMBOYANT TREE, FLAME TREE

Tree Characteristics

Vase Shape.

Has Partly Deciduous foliage.

Height: 35 - 40 feet.

Width: 40 - 60 feet.

Growth Rate: 24 or More Inches per Year.

Leaves Bipinnately Compound, Green, No Change, Partly Deciduous.

Flowers Showy. Red or Orange. Flowers in Summer. Has perfect flowers (male and female parts in each flower).

Persistent, Green to Brown Pod, Very Large (Over 3.00 inches).

Shading Capacity Rated as Moderate in Leaf.

Litter Issue is Flowers, Dry Fruit and Leaves.

Tree Site Conditions & Constraints

Sunset Zones 22 - 23; H1, H2.

USDA Hardiness Zones 11 - 12.

Exposure Full Sun.

Well Drained Soil.

Clay, Loam or Sand Texture.

Acidic to Alkaline Soil pH.

Pests & Disease Information

Susceptible to Caterpillars, Root Fungus.

Health, Safety & Environmental Concerns

Root Damage Potential Rated as High.

Special Uses & Values

Specimen, Shade Tree or Street Tree.

Cite this tree:
SelecTree. "Delonix regia Tree Record." 1995-2020. Jun 5, 2020.
< https://selectree.calpoly.edu/tree-detail/delonix-regia >

This tree is not part of the SelecTree Nursery Connection. If you would like to see this tree listed, or know of a nursery that sells it, please contact us at ufei@calpoly.edu.