Feather reed grass is a hybrid of non-native grasses. It is a cool season grass that offers a very narrow, upright habit and interest in winter. It is a clumping grass.
This plant has some cultivated varieties. Go to list of cultivars.
- Mixed border,
- Large plant (more than 24 inches)
- Full sun (6 hrs direct light daily)
- Zone 5 (Chicago),
- Zone 6,
- Zone 7,
- Zone 8,
- Zone 9
- Moist, well-drained soil
- Early winter,
- Mid winter,
- Late winter,
- Early summer,
- Mid summer,
- Late summer,
- Early fall,
- Mid fall,
- Late fall
Size and Form
This is a fairly narrow, upright grass. It grows about 3 feet tall in foliage and up to 5 feet tall when in flower and fruit.
Best growth is obtained in a sunny site with a moist soil. It is low maintenance as it is a clumping grass and does not produce viable seeds. Tolerates heavy clay soils.
Although this is a cool season grass, it tends to act more like a warm season grass in northern climates and is most active growth occurs in summer. It will remain standing in winter and can act as winter interest
Since this grass remains attractive through winter, it should not be cut back until early spring, before new growth begins. At that time, it can be cut down to the ground.
Disease, pests, and problems
No serious problems.
Disease, pest, and problem resistance
Will not self-sow like many other grasses, so seedlings are not a problem.
Native geographic location and habitat
Of hybrid origin.
The long slender leaves are dark green in summer, turning tan to buff in winter.
The tiny flowers are numerous and held in upright, fluffy clusters. Flowers clusters open green with subtle undertones of silvery and purple. Flowering time is late May into June.
The small fruit (caryopsis or grains) form along the upright clusters that held the flowers. They start out golden yellow and then mature to a tan or buff color for winter.
Cultivars and their differences
Eldorado (Calamagrostis x acutiflora 'Eldorado'): A variegated cultivar with green and gold stripes.
Karl Foerster (Calamagrostis x acutiflora 'Karl Foerster'): A slightly more compact cultivar that blooms slightly earlier than the species.
Overdam (Calamagrostis x acutiflora 'Overdam'): Variegated leaves with green and creamy white stripes. A more compact variety (3 to 4 feet when in flower).