Xanthorrhoea australis
Grass Tree
The Xanthorrhoea australis, commonly known as the Grass Tree, is an iconic and slow-growing evergreen plant native to Australia. It is distinguished by its tufted, grass-like foliage, which forms dense crowns atop a thick, blackened trunk, often resulting from natural fire exposure. Mature plants can develop a tall flower spike covered with small, fragrant cream-coloured blossoms, which attract birds and insects. Growing up to 4 metres in height (including the flower spike), this hardy species is well-suited to arid and temperate landscapes.
Grass Trees are revered for their unique appearance, resilience, and cultural significance to Indigenous Australians.
Specifications
- Height1 to 4 metres (including flower spike)
- Width1 to 2 metres
- Native toAustralia
- FoliageLong, narrow, grass-like green leaves forming a dense tuft; evergreen
- Growth rateExtremely slow (1 to 2 cm per year)
Conditions
- SoilPrefers well-drained sandy or loamy soils; tolerates poor and rocky soils
- LightFull sun to partial shade
- WaterLow; highly drought-tolerant once established
- ClimateThrives in arid, semi-arid, and temperate regions
Additional Features
- FlowersTall flower spikes with cream-coloured blooms attract birds, bees, and other pollinators
- UsesIdeal for feature planting, rock gardens, native landscaping, and xeriscaping
- SpacingPlant 1 to 2 metres apart for individual displays or mass plantings
- Low MaintenanceRequires minimal care; fire-adapted species benefits from occasional clearing of dead foliage
- Pest ResistanceNaturally resilient; monitor for mealybugs and fungal diseases in stressed plants
- Wildlife AttractionProvides nectar for pollinators and shelter for small animals
- Cultural SignificanceValued by Indigenous Australians for its resin, edible roots, and flower spikes
- Fire AdaptationRegenerates after fire; blackened trunk is a natural feature of older plants
The Grass Tree is a unique and striking plant, perfect for adding architectural interest to native gardens, arid landscapes, and sustainable designs. Its slow growth and longevity make it a timeless addition to Australian-inspired gardens.