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Gahnia setifolia (Mapere)

Mapere, Hook Grass, Saw Sedge

Gahnia setifolia, commonly known as Mapere or Hook Grass, is a hardy New Zealand native sedge ideal for wetlands, forest margins, and restoration projects. This robust plant features arching, strap-like foliage and thrives in full sun to part shade with moist, well-drained soils. Mapere is excellent for erosion control, habitat planting, and adding structure to native landscapes. Its resilience to wind, frost, and poor soils makes it a reliable, low-maintenance choice for naturalistic NZ gardens.

Gahnia setifolia (Mapere) plant with green foliage and a brown flower head.

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Suited to regions:All regions
Plant type:Grasses
Height:1.75 m
Spread:1.50 m
Flowering time:
Tolerances:
Garden uses:Ponds
Garden styles:Alpine, Backyard, City & Courtyard, Frontyard, Modern, Native, Riparian
Easy to grow?Yes
Maintenance requirementsLow
Growth rateMedium
Also known asMapere, Hook Grass, Saw Sedge
Sku10104

Growing Gahnia setifolia Successfully in NZ

Gahnia setifolia, also known as Mapere, is a resilient native sedge well-suited to New Zealand's diverse conditions. It thrives in full sun to partial shade and prefers moist, free-draining soils, but can tolerate drier periods once established. This plant is ideal for wetland edges, forest margins, and areas prone to erosion. It forms large, dense clumps with coarse, arching leaves, offering excellent habitat value for native wildlife. Gahnia setifolia is a great choice for ecological restoration and low-maintenance native gardens.

Gahnia setifolia Care Tips

Plant Gahnia setifolia in full sun or partial shade with moist, well-drained soil. While it prefers damp conditions, it can tolerate dry periods once established. Water regularly during the first growing season to help roots develop. Prune back old or damaged foliage in late winter to maintain a tidy appearance. Avoid overly rich soils, as this species thrives in low-nutrient environments. Gahnia setifolia is a hardy, wind- and frost-tolerant plant that is generally pest- and disease-free.

Plant Size and Spacing for Gahnia setifolia (Mapere)

Gahnia setifolia typically grows 1.5 to 2 metres tall and up to 1.5 metres wide, forming large, arching clumps. When planting, space individuals about 1.2 to 1.5 metres apart to allow for their mature size and natural spread. This spacing is ideal for restoration planting, erosion control, or creating bold structural elements in native gardens.

Landscaping uses for Gahnia setifolia (Mapere)

Use Gahnia setifolia (Mapere) for textured borders, repeated group planting, and natural garden designs. Position it where its natural form can be appreciated and allow sufficient space for mature growth. Combine it with plants that enjoy similar light, soil, and watering conditions for a practical and cohesive display. Repeated planting adds rhythm, while a single specimen can create a distinctive focal point. Place it near contrasting foliage so its shape stands out clearly in the planting.

Why buy Gahnia setifolia (Mapere) from The Plant Company?

Buy Gahnia setifolia (Mapere) from The Plant Company, NZ's most trusted plant nursery. Choose from our extensive range and get practical advice to help match your plants to your local conditions. Our team makes online ordering straightforward, with careful packing and delivery throughout New Zealand. Whether you are planning textured borders or refreshing an established display, we can help you select suitable plants. Explore the available options and take the next step towards a beautiful, rewarding planting project.

Questions and Answers

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