Blue Plumbago – Desert Horizon Nursery

Plumbago Blue

Plumbago auriculata
Categories:
Shrubs  ·  
Flowering Shrubs
Light
Full sun (afternoon shade in low desert)
Water
Moderate water; irrigate deeply, allowing the upper few inches of soil to dry between waterings. Water more frequently during extreme summer heat and establishment; reduce in winter.
Size
4-6 ft tall × 6-8 ft wide
Habit
Mounded – spreading shrub
Toxicity
Toxic if Ingested; Sap Irritant
Description
A sprawling South African shrub with soft green foliage and clusters of sky-blue flowers; well suited to sheltered Phoenix gardens with supplemental irrigation.
Bloom Time
Spring through fall
Deciduous / Evergreen
Semi-evergreen
Special Features
Attracts Butterflies
Growth Rate
Moderate to fast
Growth Habit
Mounded – spreading shrub
Mature Size
4-6 ft tall × 6-8 ft wide
Flower Color
Sky blue
Foliage Color
Medium green
Landscape Use
Border / Bed, Container / Patio, Foundation Planting, Hedge / Screen, Trellis / Arbor / Wall
Garden Style
Container / Patio, Hedge / Formal, Pollinator / Wildlife
Soil
Sandy / Rocky, Well-Drained
Companion Plants
Autumn sage, Cape honeysuckle, Lantana, Society garlic, Yellow Bells
Toxic if Ingested; Sap Irritant
Sap and foliage are a skin irritant; mildly toxic if ingested
Care Instructions

Light: Morning sun with afternoon shade is ideal in Phoenix; tolerates full sun with adequate water but may scorch in reflected heat.

Water: Moderate water; irrigate deeply, allowing the upper few inches of soil to dry between waterings. Water more frequently during extreme summer heat and establishment; reduce in winter.

Soil: Well-drained soil; tolerates sandy and loamy soils. Improve compacted soil and avoid persistently wet roots.

Mature size: Typically 3–6 feet tall and 4–8 feet wide; sprawling stems may extend farther if unsupported or unpruned.

Bloom: Flowers from spring through fall, sometimes 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 Zone 9b, with possible stem dieback during freezes.

Growth rate: Moderate to fast with warmth and adequate moisture.