Lomandra glauca 'Blue Ridge'

Blue Ridge Mat Rush

Botanical Name: Lomandra glauca 'Blue Ridge'
Family: Asparagaceae
Origin: Australia (cultivated selection)
Plant Type: Evergreen clumping perennial (strappy leaf)

Overview

A striking Australian native grass perfectly suited to Adelaide's Mediterranean climate, Lomandra glauca 'Blue Ridge' forms neat, upright clumps of fine, blue-grey strappy foliage that brings cool-toned texture and year-round structure to water-wise gardens. Compact, tough and exceptionally low-maintenance, it thrives in full sun or shade, tolerates drought, frost, wind and coastal conditions with ease. Ideal for mass planting, borders, edging, rockeries and containers, 'Blue Ridge' delivers soft blue-grey colour, fine texture and reliable performance across Adelaide's toughest landscapes.

Key Features

• Mature Size: 40–60 cm H × 40–60 cm W (compact, upright clumping habit)
• Growth Rate: 20–30 cm per year under good conditions
• Foliage: Fine, narrow blue-grey to silvery-grey strappy leaves; upright, arching habit; evergreen year-round with consistent cool-toned colour
• Flowers: Small, cream to pale yellow flower spikes in spring (September–November); lightly fragrant; mostly hidden within foliage
• Fragrance: Flowers lightly fragrant—subtle, sweet scent
• Seasonal Interest: Evergreen blue-grey structure year-round; subtle spring flowering; foliage colour intensifies in cooler months
• Wildlife Value: Flowers attract native bees and beneficial insects; provides shelter and habitat for small native wildlife
• Tolerance: Exceptional drought tolerance once established; exceptional heat tolerance; frost-hardy (tolerates moderate to heavy frosts); excellent wind tolerance; exceptional coastal tolerance—highly salt-spray and wind resistant; adapts to full sun or deep shade; poor soil tolerant; tolerates waterlogging better than most lomandras (but still prefers well-drained soils)
• Planting Density: Mass planting: 3–5 plants per m²; Edging/border: 50–70 cm apart for continuous effect
• Pet Friendly: Yes—non-toxic and safe for pets

Where It Works Best

• Sunlight: Full sun to full shade (highly adaptable; blue-grey colour is best in full sun; tolerates deep shade exceptionally well)
• Soil: Well-drained loam, sandy loam, clay loam, or gravelly soil; thrives in poor, lean soils; tolerates Adelaide's alkaline soils; adapts to heavier soils better than many native grasses; excellent in containers with premium potting mix
• Water Needs:
  • Establishment: Deep soak twice weekly for 6–8 weeks
  • Established: Deep soak every 14–21 days in summer (or less—extremely drought-tolerant); minimal to no watering in winter once established
• Maintenance: Very low maintenance; trim back tatty or damaged foliage in late winter (cut to 10–15 cm above ground to refresh); avoid fertilisers (thrives in lean soils); use low-phosphorus native fertiliser sparingly if desired; virtually pest and disease-free; weed-suppressing once established
• Lifespan: 10–20+ years with minimal care
• Climate Zones: Ideal for Mediterranean and temperate South Australia—Adelaide plains, foothills, Fleurieu Peninsula, coastal and inland gardens; thrives in exposed, difficult, and shaded sites
• Soil pH: Neutral to mildly alkaline (pH 6.5–8.0); performs exceptionally well on Adelaide's calcareous soils

Landscape & Design Ideas

• Mass planting in water-wise garden beds for soft blue-grey textural carpets
• Edging along paths, driveways, or garden borders for cool-toned definition
• Contemporary and modern landscapes paired with gravel, pavers, and architectural hardscaping
• Understory planting beneath trees or in shaded areas where other plants struggle
• Coastal gardens and beachfront properties—exceptional salt and wind tolerance
• Rockeries and gravel gardens for textural contrast
• Mixed native gardens with westringia, dianella, and native grasses
• Low-maintenance nature strips and verges
• Large containers and pots for patios and courtyards
• Erosion control on slopes and embankments

Why You Will Love It

'Blue Ridge' mat rush is the ultimate set-and-forget native grass for Adelaide's toughest conditions. Fine blue-grey foliage delivers year-round cool-toned beauty with virtually no maintenance, thriving equally well in blazing sun or deep shade, drought or occasional wet feet, coastal salt or inland heat. Compact, tough, and effortlessly elegant—it's the versatile native workhorse for water-wise South Australian landscapes.