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Carex Inversa (Knob Sedge)

Carex Inversa (Knob Sedge)

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Carex Inversa (Knob Sedge) is a hardy, grass-like native sedge that forms neat green tufts and spreads gently through underground stems. It is well suited to natural-style gardens, wetland edges, creek banks, rain gardens, and areas with seasonally moist soil, bringing soft texture and movement to the landscape. Yarra Ranges describes it as a loosely tufted sedge with erect flowering stems up to around 50cm high.

This is a practical choice for customers wanting a low-maintenance, resilient plant for damp or difficult areas. Its fine green foliage and small brown to chestnut flowerheads give it a natural, understated look, making it useful for mass planting, habitat gardens, erosion control, and revegetation projects. It tolerates moist to wet soils and can also handle periodic dry periods once established.

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Mature height

10cm – 50cm approx.

Mature width

30cm – 60cm approx., spreading by underground rhizomes

Spacing

30cm – 50cm apart for garden planting; closer spacing may be used for mass revegetation

Evergreen/Deciduous

Evergreen perennial sedge

Foliage

Mid-green foliage with brown to chestnut flowerheads

Flowering Period & Fruit Development/Harvest

Spring to autumn, commonly September to February depending on climate

Sun tolerance

Full sun to semi-shade

Maintenance

Low maintenance; trim back old foliage as needed to refresh growth

Root System

Fibrous, rhizomatous root system that spreads through underground stems; useful for stabilising moist soils