Lomandra longifolia

Spiny-Headed Mat Rush / Basket Grass

Botanical Name: Lomandra longifolia
Family: Asparagaceae
Origin: Australia (widespread across eastern and southern Australia)
Plant Type: Evergreen clumping perennial (strappy leaf)

Overview

A classic Australian native grass perfectly suited to Adelaide's Mediterranean climate, Lomandra longifolia forms robust, upright clumps of long, dark green strappy foliage that brings year-round structure and texture to water-wise gardens. Exceptionally tough, versatile and low-maintenance, it thrives in full sun or deep shade, tolerates drought, frost, wind, coastal conditions and occasional waterlogging with ease. Ideal for mass planting, borders, edging, erosion control, roadside plantings and containers, this reliable native workhorse delivers evergreen performance across Adelaide's toughest landscapes.

Key Features

• Mature Size: 60–90 cm H × 60–90 cm W (upright, arching clumping habit)
• Growth Rate: 20–40 cm per year under good conditions
• Foliage: Long, narrow dark green to grey-green strappy leaves; upright, gracefully arching habit; evergreen year-round; leaves can have slightly rough edges (hence "spiny-headed")
• Flowers: Cream to pale yellow fragrant flower spikes in spring and early summer (September–December); strongly honey-scented, especially in warm weather
• Fragrance: Flowers highly fragrant—strong, sweet honey scent that carries through the garden
• Seasonal Interest: Evergreen structure year-round; spectacular fragrant spring–summer flowering; foliage remains consistent through all seasons
• Wildlife Value: Excellent for wildlife—flowers attract native bees, butterflies, and beneficial insects; provides important habitat and shelter for small native birds, lizards, and frogs
• 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 occasional waterlogging and heavy clay soils; one of the toughest native grasses available
• Planting Density: Mass planting: 2–4 plants per m²; Edging/border: 60–90 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; performs equally well in blazing sun or deep shade)
• Soil: Adapts to almost any soil type—well-drained loam, sandy loam, clay loam, heavy clay, or gravelly soil; thrives in poor, lean soils; tolerates Adelaide's alkaline soils; excellent in containers with premium potting mix; one of the few natives that tolerates occasional waterlogging
• 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 and promote fresh growth); avoid fertilisers (thrives in lean soils); use low-phosphorus native fertiliser sparingly if desired; virtually pest and disease-free; weed-suppressing once established
• Lifespan: 15–25+ 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, waterlogged, and shaded sites
• Soil pH: Neutral to mildly alkaline (pH 6.5–8.0); performs exceptionally well on Adelaide's calcareous soils; tolerates slightly acidic soils

Landscape & Design Ideas

• Mass planting in water-wise garden beds for evergreen textural impact
• Edging along paths, driveways, nature strips, or garden borders
• Erosion control on slopes, embankments, and swales—excellent root system stabilizes soil
• Roadside and median plantings—extreme tolerance to tough urban conditions
• Understory planting beneath trees or in shaded areas where other plants fail
• Coastal gardens and beachfront properties—exceptional salt and wind tolerance
• Bioretention basins and rain gardens—tolerates occasional waterlogging
• Mixed native gardens with westringia, dianella, and kangaroo paw
• Low-maintenance nature strips, verges, and public spaces
• Large containers and pots for low-water landscaping
• Wildlife gardens and habitat corridors for native birds and insects

Why You Will Love It

Lomandra longifolia is the ultimate Australian native workhorse—thriving in conditions that would kill most other plants. Evergreen, drought-proof, shade-tolerant, and virtually indestructible, it delivers year-round structure with spectacular fragrant spring flowers that perfume the entire garden. Tough enough for roadside plantings, beautiful enough for feature gardens, and low-maintenance enough to plant and forget—it's an essential native for every South Australian landscape.