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Calamagrostis acutiflora 'Karl Foerster'

('Karl Foerster' feather reed grass)

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Hardiness Zones:

Quick Overview:

'Karl Foerster' is a hybrid (C. arundinacea x C. epigejos) feather reed grass cultivar which is valued for its early bloom, vertical lines and ability to grow in wet soils. It is a slowly-spreading, clump-forming, cool season ornamental grass which features an erect, slightly arching, slender clump of narrow, stiff, rich green leaves growing to 3' tall and 2' wide. Leaves produce little fall color, eventually turning tan in winter. In June, tightly-vertical flower stalks rise well above the foliage to 6' tall bearing narrow plumes of feathery, purplish-green flowers which turn golden as the seeds mature in summer and eventually tan.


Does well in heavy clay soils, unlike many of the other ornamental grasses. Prefers moist, rich soils which do not dry out. Blooms in light shade, and appreciates some light afternoon shade in hot summer climates. Since this hybrid is sterile, there is virtually no chance of its escaping and becoming a scourge on the landscape.

Additional Information

Common Name 'Karl Foerster' feather reed grass
Botanical Name Calamagrostis acutiflora 'Karl Foerster'
Container/Amount 1 gallon
Plant Category Ornamental Grass
Evergreen or Deciduous Deciduous
Hardiness Zone 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
Height 3 to 5 ft.
Width 1.5 to 2.5 ft.
Growth Rate Fast
Light Requirements Sun, Part-sun, Part-shade
Soil Condition Well-drained
Water Needs Average
Blooming Period May to February
Flower Color light pink/white
Fragrance No
Foliage Color Green
Berry Color No
Deer Resistant Yes

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