Eremophila glabra 'Blue Horizon'

Eremophila glabra ‘Blue Horizon’

Botanical Name: Eremophila glabra ‘Blue Horizon’
Family: Scrophulariaceae
Origin: Australia (hybrid/selected form of a widespread native species)
Plant Type: Evergreen perennial groundcover shrub

Overview

A hardy, low-growing Australian native, Eremophila glabra ‘Blue Horizon’ is exceptionally well suited to Adelaide and South Australia's hot, dry climate. It forms a dense, spreading mat of soft, silvery-blue foliage and produces abundant orange to apricot tubular flowers from late winter through spring, often continuing into early summer. Compact, drought-tolerant and fast-establishing, it is ideal for banks, verges, native borders, groundcover mass plantings, and coastal landscapes where low maintenance and year-round colour are essential. Highly attractive to nectar-feeding wildlife, it thrives in full sun and poor soils where many other plants struggle.

Key Features

• Mature Size: 0.25–0.35 m H × 1.0–1.5 m W (broad, low, spreading habit)
• Growth Rate: 20-40 cm per year under good conditions
• Foliage: Fine-textured, soft, silvery-blue leaves; lightly resinous to the touch; develops silver and blue-grey tints in sun and subtle bronze tones in winter cold
• Flowers: Orange to apricot tubular blooms from late winter–spring, with sporadic flowers into early summer. Flowers are mildly sweet at close range; foliage has a light resinous scent when rubbed
  
• Seasonal Interest: A standout for its cool-toned silvery foliage year-round, with a strong late winter–spring flowering display that brings early-season nectar and colour when many native gardens are still quiet.
• Wildlife Value: Rich in nectar, the tubular blooms attract honeyeaters, small native birds, bees, and beneficial insects. Dense foliage also provides low shelter for ground-dwelling species.
• Tolerance: Extremely drought-tolerant once established, heat-tolerant, wind-tolerant and highly suitable for coastal conditions including salt-laden winds. Handles light frosts and thrives in nutrient-poor, sandy or gravelly soils typical of many SA landscapes.
• Planting Density: Mass planting or groundcover: 1–1.5 m apart; Slope or bank stabilisation: 1–1.2 m apart for full coverage; Specimen groundcover: allow 1.5 m spread
• Pet Friendly: Safe and non-toxic to cats and dogs.

Where It Works Best

• Sunlight: Full sun is essential for best foliage colour and dense growth; tolerates very light part shade but less flowering
• Soil: Prefers free-draining sandy, gravelly or loamy soils; tolerates limestone and alkaline soils common in Adelaide. Avoid waterlogged clays
• Water Needs: Establishment: 2 deep soaks/week for 8–12 weeks. Established: deep soak every 2–3 weeks in summer (weekly during extreme heatwaves); little to no watering required in cooler months
• Maintenance: Low-maintenance. Lightly trim after flowering to maintain a crisp, spreading form. Avoid hard pruning into old wood. Mulch with gravel or light organic mulch. Fertilise sparingly with a low-phosphorus native formula if needed.
• Lifespan: 10–20+ years in well-drained, low-rainfall gardens
• Climate Zones: Highly suited to Mediterranean and temperate South Australian regions, including Adelaide plains, northern suburbs, Fleurieu Peninsula, Yorke Peninsula, Eyre Peninsula, and coastal towns
• Soil pH: Tolerant of slightly acidic to moderately alkaline soils; best performance in neutral to alkaline sand or loam with sharp drainage

Landscape & Design Ideas

• Low, spreading native groundcover for hot, exposed sites
• Mass plant on banks, verges, and coastal slopes
• Combine with Westringia, Lomandra, Leucophyta brownii, and Eremophila nivea for silver and pastel-toned native palettes
• Ideal foreground plant for native or waterwise garden beds
• Excellent for coastal gardens needing dense, wind-hardy structure

Why You Will Love It

A beautifully soft, silver-blue groundcover that thrives on neglect, Eremophila glabra ‘Blue Horizon’ brings drought resilience, long seasonal colour, and effortless texture to Adelaide gardens. Perfect for slopes, coastal conditions, and sunny native beds, while providing vital early-season nectar for wildlife.