Deep, regular irrigation during establishment. Once established, water deeply and allow the upper soil to dry between waterings; supplemental summer irrigation is important in Phoenix.
A subtropical shade tree with finely divided, fernlike foliage and spectacular lavender-blue flowers; best suited to warm, frost-sheltered Phoenix locations.
Light: Full sun for best flowering; avoid intense reflected heat from west-facing walls, especially for young trees.
Water: Deep, regular irrigation during establishment. Once established, water deeply and allow the upper soil to dry between waterings; supplemental summer irrigation is important in Phoenix.
Soil: Well-drained sandy or loamy soil preferred. Avoid waterlogged sites; strongly alkaline soils may cause iron chlorosis.
Mature size: Typically 30–50 feet tall and 25–40 feet wide, often smaller under desert conditions.
Bloom: Showy spring to early-summer bloom, typically April–June in Phoenix; occasional lighter repeat flowering.
Evergreen / deciduous: Semi-evergreen to deciduous; often loses leaves in winter or before spring flowering.
Growth rate: Moderate to fast with adequate warmth and irrigation.