Delonix regia, commonly called Royal Poinciana, requires full sun and daily watering for fullest flowering and is drought tolerant but not salt tolerant. The tree grows in a wide range of well-drained acidic or alkaline soils, including clay, sand and loam. It is a tropical tree hardy to USDA Hardiness Zones 10B through 11.
Royal Poinciana requires daily watering until it is well-established. After that, it only needs water during severe droughts. Plant the tree at least 10 feet from sidewalks or other hardscape to prevent damage from the large surface roots. Grass will not grow well under this tree.
This tree has weak wood. Prune its limbs early to encourage branching, keeping the major limbs to no more than half the diameter of the trunk. Propagation is by the seeds found in the tough brown seed pods that grow up to a foot long.