gardmi 🇺🇸 Garden site planner
Flame tree (royal poinciana) (Delonix regia)
Flowering tree

Flame tree (royal poinciana)

Delonix regia

Spreading flowering tree 8–12 m tall with a crown usually wider than tall, 12–18 m (UF/IFAS); Gardmi uses a 14 m crown. Surface roots lift paving, so keep it well away from buildings. Frost-tender (USDA 10b–11).

Planning parameters

Use these values as a practical planning envelope: they describe the adult plant, not the young seedling.

Adult height
8-12 m
Crown diameter
14 m
Root zone
14 m
Root type
Wide shallow surface roots that can lift paving and crack thin slabs
Recommended setback
Keep at least 7 m from the house, pool and paving
Growth rate
Fast
Hardiness
USDA 10b–11 (damaged below about 0 °C)
Crown density
Medium, light filtered shade

Site requirements

These conditions decide whether the plant will establish well after planting.

Light
Full sun
Watering
Moderate; drought tolerant once established
Soil type
Most well-drained soils, including sandy
Drainage
Tolerates periodic drought; avoid waterlogging
Soil pH
Acidic to alkaline

Root system and placement

Plan a root zone of about 14 m diameter

Garden role and season

These fields help choose the plant by composition, privacy, flowering and year-round value.

Form
Very wide umbrella-shaped tree, usually broader than tall
Foliage
Fine feathery bipinnate leaves; sheds them in the dry season
Season
Early summer bloom
Bloom
Masses of scarlet to orange flowers in late spring and early summer
Fruit
Long flat woody pods up to 50 cm; messy litter
Garden use
Shade and flowering specimen for large gardens; one tree shades a whole terrace

Care and risks

This is the practical part for future maintenance and safe placement on the plot.

Maintenance
Water young trees; prune early to one strong trunk with well-spaced branches
Pruning
Prune while young to avoid weak narrow forks
Risks
Weak wood — limbs break in storms; surface roots and pods; do not plant near foundations