Lomandra Confertifolia Rubiginosa 'Blooming Blue'

Blooming Blue Mat Rush

Botanical Name: Lomandra confertifolia rubiginosa ‘Blooming Blue’
Family: Asparagaceae
Origin: Australia (hybrid/selected form)
Plant Type: Evergreen perennial (grass & strappy)

Overview

A compact, fine-leafed lomandra prized for its deep blue-green foliage and exceptional toughness in South Australia’s dry, hot climate. ‘Blooming Blue’ forms dense, tufted clumps that hold their colour year-round and send up small clusters of creamy-gold flowers in spring. Ideal for borders, mass planting, coastal gardens, verges, and low-maintenance landscapes, it thrives with minimal water once established and handles heat, wind, and poor soils with ease. A reliable structural plant that brings colour contrast and durability to Adelaide gardens.

Key Features

• Mature Size: 0.4–0.5 m H × 0.4–0.6 m W – tight, rounded clumping habit
• Growth Rate: 15-25 cm per year under good conditions
• Foliage: Fine, narrow, deep blue-green strappy leaves; may show bronze or reddish tints in cold winters or extreme dryness
• Flowers: Small creamy-yellow flower spikes appearing in spring; not showy but lightly fragrant up close
  
• Seasonal Interest: Evergreen colour with striking blue-toned foliage year-round; spring bloom adds subtle seasonal texture
• Wildlife Value: Provides habitat for small insects; flowers offer light nectar for bees
• Tolerance: Highly drought-tolerant once established; excellent heat and wind tolerance; suitable for second-line coastal plantings; handles light frost
• Planting Density: Mass planting: 4–6 plants per m²; Borders/edging: 30–40 cm apart; Containers: 25–30 cm pots
• Pet Friendly: Non-toxic to cats and dogs; leaf edges can be slightly firm but generally safe

Where It Works Best

• Sunlight: Full sun to part shade; best colour retention in full sun
• Soil: Free-draining sandy or loamy soils; thrives in SA’s alkaline and coastal soils; avoid heavy, waterlogged clay
• Water Needs: Establishment: 2 deep soaks/week for 8–12 weeks. Established: deep soak every 3–4 weeks in summer (weekly in heatwaves); rarely required in autumn–winter
• Maintenance: Extremely low maintenance. Remove old or damaged leaves as needed; cut back lightly every 3–4 years to refresh the clump. Use a low-P native fertiliser in spring only if required
• Lifespan: 8–12+ years in well-drained positions
• Climate Zones: Mediterranean & temperate SA, including Adelaide plains, Barossa, Fleurieu, Yorke Peninsula, and coastal suburbs
• Soil pH: Neutral to alkaline; tolerates slightly acidic soils if drainage is good

Landscape & Design Ideas

• Ideal for mass planting in modern dry landscapes
• Blue foliage contrast in native gardens with Westringia, Eremophila, and Leucophyta
• Low borders along paths, driveways, and retaining walls
• Coastal and second-line coastal plantings
• Great for verges, slopes and high-heat, low-water areas
• Suitable for pots in full sun alfresco spaces

Why You Will Love It

‘Blooming Blue’ delivers striking blue-green foliage, excellent drought tolerance, and a naturally tidy, compact form—perfect for Adelaide’s heat, dry summers, and low-maintenance garden designs. A dependable structural plant that stays looking good all year with virtually no fuss.