Grasses

Calamagrostis x acutiflora 'Karl Foerster'

Karl Foerster feather reed grass

Slender, upright stems carry wheat-like flower heads above green foliage from late spring onward. The narrow shape makes a useful vertical rhythm along walks or behind lower perennials, and the tan heads remain attractive into winter. This clump-forming hybrid does not reseed and starts growth early in the season.

At a glance

Sun: Full sun
Mature size: 5 ft. in flower tall × 2 ft. wide
Water: Average; water during extreme heat
Hardiness: USDA 4–8
Bloom: Late spring; persistent tan seed heads.

Sizes & prices

#2$24.99

Catalog updated September 8, 2026. This is not a live stock count; please call to confirm availability and price.

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Resistance & tolerances

Deer: Generally resistant; not browse-proof.
Drought: Tolerates dry spells once established.

Resistance is not a guarantee; deer and rabbits may browse any plant.

Seasonal interest

Habit: Upright, clumping cool-season grass; sterile seed.

Growing & care

Pruning: Cut to about 6 in. in early spring before new growth.
Soil: Adaptable, including heavy clay.
Division: Divide in spring or fall.

Sources & photo credits

Walters Gardens

Photo: Walters Gardens, Inc. · Walters promotional/media limited license; credit required; no transfer/sublicense or downloadable-format web posting

Image notes: Calamagrostis x acutiflora 'Karl Foerster'; resized for web display.

Reviewed October 1, 2026. Growing conditions vary by location.