SelecTree: Tree Detail
Photo Locations: Kauai, HI, Waimea Valley Botanical Gardens - Waimea, HI and Haiku Palms - HI
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 Hawai'i in the mid 19th century, this species is particularly common in Honolulu, the Manoa Valley, and at the University of Hawai'i. 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 (Hawai'i 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.
Additional Common Names
ROYAL POINCIANA, FLAMBOYANT TREE, FLAME TREE
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 Legume, 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. Aug 14, 2020.
< https://selectree.calpoly.edu/tree-detail/delonix-regia >