Plumbago auriculata
Light: Morning sun with afternoon shade is ideal in Phoenix; tolerates full sun with adequate irrigation, but reflected heat can scorch foliage.
Water: Moderate water in Phoenix; water deeply, then let the upper few inches of soil dry. Irrigate more frequently during extreme summer heat and reduce watering in winter.
Soil: Well-drained soil enriched with compost. Tolerates varied soils, but highly alkaline conditions may cause iron chlorosis.
Mature size: Typically 3–6 feet tall and 5–8 feet wide; can spread farther or reach greater heights when trained against support.
Bloom: Repeated flowering from spring through fall; may bloom into winter in frost-protected locations.
Evergreen / deciduous: Evergreen in frost-free conditions; semi-evergreen or frost-deciduous in Zone 9b, with possible stem dieback during freezes.
Growth rate: Fast with warmth and adequate moisture.