Calamagrostis × acutiflora ‘Karl Foerster’
Overview
Uses: Borders, mass plantings, patio containers, foundation plantings, and vertical accents in perennial beds.
Benefits: Upright golden plumes that persist through summer and often into winter. Adaptable to clay soils and tolerant of urban conditions.
USDA Hardiness Zones: 5–9
Sun: Full Sun to Partial Sun/Shade
Life Cycle: Hardy Perennial
Growth Habit: Upright, Clumping — vertical blades with narrow footprint.
Bloom Color: Golden
Foliage Color: Green
Mature Height: 36"–60"
Mature Width: 18"–30"
Bloom Season: Summer
Growth Rate: Fast
Summary
A clean, vertical ornamental grass that adds structure to any planting design.
‘Karl Foerster’ forms narrow clumps of upright green foliage topped by feathery golden plumes that rise above the blades in early summer. The flower heads mature to warm tan tones and often persist through fall and winter, providing extended seasonal interest.
Its strong vertical habit makes it especially useful for defining borders, softening fences, or adding movement to perennial plantings without overwhelming nearby plants.
Care
Karl Foerster Feather Reed Grass Care
Plant in full sun for the strongest vertical growth and best flowering. Partial sun is tolerated but may reduce plume density.
Grow in well-drained soil. While adaptable to heavier clay soils, consistent moisture during establishment encourages strong root development.
Apply a slow release fertilizer in spring if additional nutrition is needed.
Cut back foliage to about 2–3 inches above the ground in late winter before new growth emerges. Division may be done in spring if clumps become dense.
Size
What Size is Karl Foerster Feather Reed Grass for Sale Online?
This plant ships in a greenhouse-grade grow pot and is well-rooted and actively growing at time of shipment. For specific sizing questions, please contact us.
How Large Does Karl Foerster Feather Reed Grass Grow?
Mature plants typically reach 3–5 feet tall and 1.5–2.5 feet wide, maintaining a narrow, upright profile.
Additional Information
What are some common names for this plant?
This plant is commonly known as Feather Reed Grass or Karl Foerster Feather Reed Grass.
Is it suitable for borders or mass plantings?
Yes. Its upright clumping habit makes it effective in rows or grouped plantings for structure and movement. Explore more options in our Ornamental Grasses collection.
Is Karl Foerster deer resistant?
Ornamental grasses are generally less preferred by deer. If browsing is a concern, browse additional selections in our Deer-Resistant Perennials and Grasses collection.
Can it be grown in containers?
Yes. Its narrow footprint makes it suitable for large patio containers. For more compact outdoor selections, see our Patio Plants collection.
