Cousin It – Casuarina glauca 'Cousin It'
Common name: Cousin It
Botanical name: Casuarina glauca 'Cousin It'
Plant type: Low-growing, evergreen ornamental groundcover.
Cousin It is a beautiful Australian native plant known for its unusual, soft, flowing green foliage. Its cascading growth makes it a fantastic choice for modern gardens, retaining walls, rockeries and decorative pots.
Main features
Height: Approximately 20–30 cm.
Width: Can spread around 1–1.5 metres or more.
Foliage: Fine, dense, dark-green, needle-like foliage.
Growth habit: Low, spreading and cascading.
Evergreen: Provides year-round greenery.
Hardiness: Drought tolerant once established.
Australian native: Excellent for water-wise gardens.
Why is Cousin It so popular?
Creates a beautiful waterfall effect over retaining walls and garden edges.
Excellent alternative to traditional groundcovers.
Requires relatively little maintenance once established.
Tolerates Perth's hot summers.
Perfect for contemporary, coastal and native gardens.
Looks stunning in decorative pots and raised garden beds.
How to grow Cousin It in Perth
Sunlight: Best in full sun, but tolerates part shade. Full sun encourages dense growth.
Soil: Plant in well-drained soil. Improve heavy clay soil before planting.
Watering:
Water regularly during establishment.
Increase watering during Perth's hot summer.
Once established, it is drought tolerant.
Avoid prolonged waterlogging.
Fertilising:
Apply a slow-release native fertiliser in spring.
Avoid excessive fertilising.
Pruning:
Minimal pruning required.
Trim lightly to maintain shape and encourage fresh growth.
Remove damaged or untidy stems when needed.
Landscaping importance
Cousin It is particularly useful for:
Retaining walls – beautiful cascading green foliage.
Rockeries – creates a soft, natural appearance.
Garden borders – attractive low-growing groundcover.
Sloping gardens – helps cover exposed soil.
Decorative pots – creates a stunning spilling effect.
Native gardens – excellent Australian native landscaping plant.
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