Calamagrostis × acutiflora 'Karl Foerster'
In open sunny borders, this can be the workhorse of planting schemes, emerging in late winter with bright green leaves forming dense upright columns that rush into bloom by very beginning of summer. The plumes start out reddish-brown and open up fully, fading to pinky-gray then bleaching to straw colour when feathered stems fold tightly back against stalks. Dense terminal straw-coloured spikes persist deep into winter except in wettest regions. Early maturing makes for excellent seasonal screen.
Great Plant Pick and Perennial Plant Association Plant of Year 2001. Less suitable for wet areas where rains lead to collapsed plants. The early bloom and persistent structure are exceptional. Suitable for borders, screening, and mass plantings. Self-supporting and upright. One of the most popular ornamental grasses. Low maintenance once established.
Growing Conditions
Light: full sun
Moisture: average
Soil: average
Hardiness zone: 4
Maintenance: low
Size & Habit
Height (cm): 200
Spread (cm): 60
Habit: stiffly upright
Seasonal Interest
Flowering period: June–July
Seasonal interest: early summer bloom; persistent winter structure; stiffly upright form
Foliage: bright green
Flower: reddish brown to straw
Ecology & Notes
Wildlife value: seed for birds
Deer/Rabbit resistance: yes
Habitat: borders; screening; mass plantings; seasonal screen
Features: reddish-brown to straw plumes; stiffly upright; early blooming; persistent winter structure; workhorse grass; GPP; PPA 2001
Notes: GPP; PPA 2001; workhorse grass; early bloom; persistent structure; less suitable for wet areas; self-supporting