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Calamagrostis acutiflora Karl Foerster

Calamagrostis acutiflora Karl Foerster, commonly known as Karl Foerster Reed Grass, is a striking ornamental grass that adds height and texture to any garden. Recognized for its graceful vertical growth, this perennial loves full sun and evenly moist soil, making it a popular choice for landscapes across New Zealand. Its feathery flower plumes provide interest throughout the growing season and are perfect for garden borders, mass plantings, and even as cut flowers for floral arrangements.

Calamagrostis 'Karl Foerster'

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Calamagrostis 'Karl Foerster' is a popular ornamental grass known for its upright, clump-forming habit and tall, feathery flower plumes. It grows to around 1.5 to 2 metres tall and forms narrow green foliage that turns golden in autumn. Flower spikes emerge in late spring and hold their form well into winter, adding structure year-round. Hardy and low maintenance, it thrives in full sun with well-drained soil, making it ideal for borders, mass planting, or contemporary NZ gardens.

Calamagrostis 'Karl Foerster' grasses as a mass planting and featuring elegant, cream-coloured flower heads as plumes.
  • Suited to regions:
    All regions
  • Plant type:
    Grasses
  • Height:
    1.20 m
  • Spread:
    60 cm
  • Flowering time:
    Summer, Autumn, Winter
  • Tolerances:
    Coastal, Extended dry periods, Hardy, Wet, Wind
  • Garden uses:
    Containers, Living areas, Ponds, Pool areas
  • Garden styles:
    Architectural, Backyard, City & Courtyard, Coastal, Frontyard, Japanese, Mediterranean, Modern
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Calamagrostis 'Karl Foerster'

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Characteristics and Growth Habits

Calamagrostis acutiflora Karl Foerster typically reaches a height of 1.2 to 1.5 meters, making it an eye-catching addition to any garden. The narrow, arching leaves are green in summer, turning a warm golden hue in the fall. The erect flower spikes emerge in late spring and remain an attractive feature well into winter, providing horizontal interest and movement in the garden as they sway in the breeze.

This hardy grass is not only drought-tolerant once established, but it also withstands various soil conditions, making it suitable for a range of garden settings. Whether you're looking to create a serene oasis or a lively border, Calamagrostis acutiflora Karl Foerster can effortlessly enhance your space.

Ideal Uses in Landscaping

With its impressive height and structure, Calamagrostis acutiflora Karl Foerster can be utilized in a variety of landscaping applications. It works beautifully as an architectural feature in modern gardens or as part of a cottage-style planting scheme. This ornamental grass pairs well with other species, allowing for creative combinations and color contrasts.

For example, consider combining it with Calamagrostis Overdam, which features broader foliage and is also quite resilient. For a more tropical feel, try pairing it with Cyperus King Tut, a stunning sedge that adds an exotic twist to your garden design. Alternatively, you could use it alongside Liriope spicata for delightful textures and layers.

Care and Maintenance

Caring for your Calamagrostis acutiflora Karl Foerster is straightforward. These grasses thrive on minimal maintenance but do appreciate occasional trimming. In late winter or early spring, cut back last year's foliage to allow new growth to flourish. Fertilizing with a balanced garden fertilizer in early spring will encourage robust growth and vibrant blooms.

As a versatile grass, it can be left standing through winter for winter interest or cut back for a clean slate in spring. When grouped with other ornamental grasses, such as Calamagrostis foliosa or Lomandra Lime Divine, it creates a dynamic and visually appealing landscape.

In summary, Calamagrostis acutiflora Karl Foerster is a superb choice for anyone looking to enhance their garden with tall, graceful grasses that offer beauty and resilience. Transform your outdoor space with this stunning perennial and enjoy the lasting beauty it brings throughout the seasons.


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