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Calamagrostis x acutiflora 'Karl Foerster' (feather reed grass)

Calamagrostis x acutiflora 'Karl Foerster'

feather reed grass

One of the most popular garden grasses in the world, 'Karl Foerster' is known for its ease of culture, tidy vertical habit and beautiful feathery blooms. In mid summer flowers open a creamy white tinged with pink. As they age they become narrow plumes of golden straw and last well into winter.

Calamagrostis x acutiflora 'Karl Foerster' LP50 - 50 per flat Availability
Calamagrostis x acutiflora 'Karl Foerster' - 50 per flat Availability
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5-6 Feet


2 Feet

Bloom Color


USDA Hardiness Zone 5-9

feather reed grass Interesting Notes

The Perennial Plant Association's 2001 Perennial Plant of the Year™

Calamagrostis x acutlflora
'Karl Foerster' is a long-blooming, low maintenance, long-lived perennial grass for full sun to partial shade. This grass grows best in well-drained fertile soils with sufficient moisture, but will tolerate heavier clay soils and drier sites.

Fertilizer may be required to produce maximum height. Low fertility will result in shorter plants. It is usually free of serious disease or insect problems although a foliar rust disease can occur in wet summers in situations with poor air circulation. Little maintenance is required except to cut back the stems to about 6 inches in late winter or early spring. In areas with mild winters the foliage may remain evergreen. This ornamental grass is a cool-season grass, which allows planting or transplanting in spring or fall. Sterility eliminates any chance of this cultivar becoming an invasive plant or create unwanted seedlings in the garden.

Calamagrostis x acutiflora 'Karl Foerster' Growing and Maintenance Tips

Calamagrostis prefers somewhat fertile, moist, well-drained soils, but can tolerate heavy clay soils. Propagate by dividision of clumps every few years and cutstems down to the ground in early spring before newgrowth occurs. This selection is sterile, so mass planting can be done without fear of invasiveness. Most effective as a vertical accent in the garden, as a screen or in containers.

Key Characteristics & Attributes

Deer Resistant
Deer Resistant
Full Sun
Full Sun
Salt Tolerance
Salt Tolerance
Cut Flower
Cut Flower

Additional Information

Season of Interest (Flowering)
Late Spring / Early Summer
Late Summer
Soil Moisture Needs
Propagation Type
Grass Type: Cool Season
Moist Sun