Plumbago auriculata
Light: Morning sun with afternoon shade is ideal in Phoenix; tolerates full sun with adequate irrigation, but avoid intense reflected heat.
Water: Moderate water in Phoenix; irrigate deeply, allowing the upper few inches of soil to dry between waterings. Water more frequently during establishment and extreme summer heat; reduce in winter.
Soil: Well-drained soil enriched with compost. Tolerates various soil textures, but strongly alkaline soil may cause iron chlorosis.
Mature size: Typically 3–6 feet tall and 6–10 feet wide; can climb higher when supported.
Bloom: Spring through fall, potentially into winter in frost-protected locations; flowering may slow during extreme heat.
Evergreen / deciduous: Evergreen in frost-free locations; semi-evergreen or frost-deciduous in Phoenix, with possible stem dieback during freezes.
Growth rate: Moderate to fast with warmth and adequate water.