Calamagrostis x acutiflora 'Karl Foerster' (Feather Reed Grass)
Feather Reed Grass 'Karl Foerster', Calamagrostis 'Stricta'Calamagrostis x acutiflora ‘Karl Foerster’, commonly known as Feather Reed Grass, is a tall, ornamental grass that brings elegance and movement to landscapes. This deciduous perennial is celebrated for its upright growth habit, which forms neat clumps of slender green foliage. In late spring to early summer, its green flower spikes emerge, maturing into golden seed heads that persist through autumn, providing interest and texture year-round. This grass can grow up to 5–6 feet tall and spreads 2–3 feet wide, making it ideal for borders, screens, or as an accent plant in modern or cottage-style gardens.
Thriving in USDA hardiness zones 4–9, ‘Karl Foerster’ adapts well to various growing conditions, including clay soils or areas with occasional flooding. It prefers full sun to light shade and performs best in fertile, well-drained soil. Furthermore, this low-maintenance grass is drought-tolerant once established and resistant to pests and diseases, ensuring consistent performance in challenging environments.
Care Instructions for Calamagrostis ‘Karl Foerster’
- Planting: Select a location with full sun to light shade and fertile, well-drained soil. Improve poor soil with organic matter to support optimal growth.
- Watering: Water regularly during the first growing season to establish roots. Once established, it is drought-tolerant but appreciates occasional watering during dry spells.
- Pruning: Cut back the foliage to 4–6 inches above the ground in late winter or early spring to encourage fresh growth. Avoid cutting back during the growing season.
- Fertilizing: Feed with a balanced fertilizer in early spring to promote vigorous growth and striking blooms. Avoid over-fertilizing to prevent weak, floppy stems.
- Mulching: Add a 2–3 inch layer of mulch around the base to retain moisture and regulate soil temperature. Keep mulch clear of the crown to prevent rot.
- Pest Management: ‘Karl Foerster’ is pest-resistant but may occasionally suffer from rust. Ensure good air circulation and avoid overhead watering to reduce the risk.
Calamagrostis ‘Karl Foerster’ is the quintessential ornamental grass, offering graceful beauty, vertical structure, and year-round interest. Its adaptability, resilience, and ease of care make it a staple in both formal and informal gardens.
