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Machaerina sinclairii
Common Names: Giant Sedge, Sinclair’s Sedge
Family: Cyperaceae
Origin: New Zealand
Plant Type: Evergreen Perennial / Sedge
Overview:
Machaerina sinclairii (Giant Sedge) is a bold, architectural New Zealand native prized for its tall, upright foliage and strong vertical form. Naturally found in wetlands and damp forest margins, this striking sedge makes an excellent feature plant in modern landscapes, rain gardens, and large containers. Its clean lines and rich green tones bring structure and texture to native and contemporary garden designs alike.
Key Features:
Foliage: Tall, strap-like, deep green leaves forming strong upright clumps.
Flowers / Fruit: Subtle brown flower heads appear in summer, adding seasonal interest.
Form & Habit: Upright, clump-forming with strong vertical architectural presence.
Growth Rate: Moderate to fast in suitable moist conditions.
Cultural & Ecological Value: Excellent for wetland restoration, erosion control, and supporting native biodiversity.
Mature Size:
| Attribute | Size |
|---|---|
| Height | 1.5–2m |
| Spread | 1–1.5m |
| Form | Upright clumping |
Ideal Growing Conditions:
| Requirement | Detail |
|---|---|
| Light | Full sun to part shade |
| Water | Moderate to high; thrives in moist soils and tolerates periodic wet conditions |
| Soil | Moist, fertile, well-drained to damp soils |
| pH Range | Acid to neutral |
| Frost Tolerance | Hardy; tolerates moderate frost |
Landscaping & Garden Uses:
• Ideal for rain gardens and swales
• Strong vertical accent in native plantings
• Excellent for pond edges and damp areas
• Suitable for large containers or mass planting
Care & Maintenance:
Pruning: Remove spent flower stems and trim older foliage as needed to maintain appearance.
Watering: Keep consistently moist during establishment; very tolerant of damp soils once established.
Feeding: Apply slow-release fertiliser in spring for vigorous growth.
Pests & Diseases: Generally pest- and disease-free.
Additional Tips:
Performs best in consistently moist environments but can tolerate drier soils once established. Allow adequate space to showcase its full upright form.
Fun Fact / Botanical Insight:
Named after Sir Andrew Sinclair, a 19th-century botanist and naturalist who studied New Zealand flora.
Why Choose Machaerina sinclairii?
If you’re looking for bold structure, height, and native resilience, Giant Sedge delivers year-round architectural impact while thriving in moisture-retentive sites.
Pot Size: These are our standard size in 7cm square pots.
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Description
Machaerina sinclairii
Common Names: Giant Sedge, Sinclair’s Sedge
Family: Cyperaceae
Origin: New Zealand
Plant Type: Evergreen Perennial / Sedge
Overview:
Machaerina sinclairii (Giant Sedge) is a bold, architectural New Zealand native prized for its tall, upright foliage and strong vertical form. Naturally found in wetlands and damp forest margins, this striking sedge makes an excellent feature plant in modern landscapes, rain gardens, and large containers. Its clean lines and rich green tones bring structure and texture to native and contemporary garden designs alike.
Key Features:
Foliage: Tall, strap-like, deep green leaves forming strong upright clumps.
Flowers / Fruit: Subtle brown flower heads appear in summer, adding seasonal interest.
Form & Habit: Upright, clump-forming with strong vertical architectural presence.
Growth Rate: Moderate to fast in suitable moist conditions.
Cultural & Ecological Value: Excellent for wetland restoration, erosion control, and supporting native biodiversity.
Mature Size:
| Attribute | Size |
|---|---|
| Height | 1.5–2m |
| Spread | 1–1.5m |
| Form | Upright clumping |
Ideal Growing Conditions:
| Requirement | Detail |
|---|---|
| Light | Full sun to part shade |
| Water | Moderate to high; thrives in moist soils and tolerates periodic wet conditions |
| Soil | Moist, fertile, well-drained to damp soils |
| pH Range | Acid to neutral |
| Frost Tolerance | Hardy; tolerates moderate frost |
Landscaping & Garden Uses:
• Ideal for rain gardens and swales
• Strong vertical accent in native plantings
• Excellent for pond edges and damp areas
• Suitable for large containers or mass planting
Care & Maintenance:
Pruning: Remove spent flower stems and trim older foliage as needed to maintain appearance.
Watering: Keep consistently moist during establishment; very tolerant of damp soils once established.
Feeding: Apply slow-release fertiliser in spring for vigorous growth.
Pests & Diseases: Generally pest- and disease-free.
Additional Tips:
Performs best in consistently moist environments but can tolerate drier soils once established. Allow adequate space to showcase its full upright form.
Fun Fact / Botanical Insight:
Named after Sir Andrew Sinclair, a 19th-century botanist and naturalist who studied New Zealand flora.
Why Choose Machaerina sinclairii?
If you’re looking for bold structure, height, and native resilience, Giant Sedge delivers year-round architectural impact while thriving in moisture-retentive sites.
Pot Size: These are our standard size in 7cm square pots.
