Sterile hybrid grass forming strict upright columns of narrow foliage topped by feather plumes that flower in early summer (earlier than most ornamental grasses) and turn straw-tan, persisting through winter.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 4–9 | −34.4 °C to −1.1 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 4–8 | −29 °C to −1 °C | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 2–5 | −10 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Plant as a vertical accent — strict upright habit at 1.5 m provides one of the most reliable architectural lines in the modern border
- Earlier flowering than most ornamental grasses — flower plumes appear in early summer rather than autumn
- Sterile hybrid — does not self-seed, no invasive concerns
- Perennial Plant of the Year (USA) 2001 and a benchmark naturalistic-style grass
Categories
Related plants
Cross-check Feather reed grass ‘Karl Foerster’ against your zones