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Cyperus involucratus

Umbrella Flat Sedge

Cyperus involucratus, commonly known as the Umbrella Flat Sedge, is a perennial grass that grows with a graceful habit and has long, bright green leaves. It carries unusual looking heads of umbrella like flowers through summer. For NZ gardeners, it is an appealing choice for moist borders, water feature margins, and textured group planting. Give it sun or partial shade and consistently moist soil to support its best growth. Choose Cyperus involucratus to bring upright texture and attractive foliage around damp garden areas to your planting.

Cyperus involucratus plants in a garden.

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Suited to regions:All regions
Plant type:Grasses
Height:70 cm
Spread:50 cm
Flowering time:
Tolerances:Wet
Garden uses:Borders, Containers, Living areas, Paths & Steps, Ponds, Pool areas
Garden styles:Alpine, Architectural, Backyard, City & Courtyard, Frontyard, Japanese, Modern, Riparian
Easy to grow?Yes
Maintenance requirementsLow
Growth rateMedium
Also known asUmbrella Flat Sedge
Sku18532

How to grow Cyperus involucratus in NZ

Grow Cyperus involucratus in full sun or partial shade, using consistently moist soil. Choose a site where the roots can remain moist and avoid prolonged drying during establishment. Set the crown at the original depth, water thoroughly, and remove competing weeds. Leave room for the mature clump. In containers, check moisture frequently and use a suitable moisture retaining mix. Protect newly planted specimens from drying winds. Check moisture regularly as the new roots settle into their surroundings.

Cyperus involucratus care tips

Care for Cyperus involucratus by matching moisture and feeding to its growing season. Maintain consistent moisture during dry weather and check containers frequently in summer. Remove old or damaged foliage without cutting into fresh growth. Feed lightly in spring if needed, avoiding excessive fertiliser. Keep weeds away from young plants and divide crowded clumps when appropriate. Monitor the root zone during drought, as steady moisture supports a full and healthy display.

Cyperus involucratus size, spacing, and growth rate

Cyperus involucratus typically reaches about 70 cm tall and 50 cm wide under suitable conditions. For individual plants, allow about 50 cm between centres to give the foliage space without excessive crowding. It has a moderate growth rate under suitable conditions. Final size varies with climate, soil, container size, and maintenance. Allow for the expected spread when positioning plants beside paths, walls, or neighbouring specimens. Check the developing plant regularly and adjust nearby planting as its natural form becomes clearer.

Landscaping uses for Cyperus involucratus

Use Cyperus involucratus for moist borders, water feature margins, and textured group planting. Cyperus involucratus is commonly planted beside pools or streams, in shallow water, added to tropical gardens, maintained in a container, planted beneath larger shrubs, or mass planted for a lovely display. Position it where its distinctive features can be appreciated and allow the natural habit to guide your design. Combine it with plants that enjoy similar light, soil, and watering conditions for a practical, cohesive display.

Why buy Cyperus involucratus from The Plant Company?

Buy Cyperus involucratus from The Plant Company, NZ's most trusted plant nursery. Our range makes it easy to choose plants that suit your garden, home, and local growing conditions. Benefit from practical growing advice, convenient online ordering, and careful packing for delivery throughout New Zealand. Whether you are planning moist borders or adding to an established collection, our team can help you make a confident choice. Explore the available options and bring your next planting project to life.

Questions and Answers

Have a question about Cyperus involucratus (Umbrella Flat Sedge)? We are here to help.

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