Fast-establishing annual grass with a dense fibrous root system. Useful where rapid soil-binding is more important than nitrogen fixation.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–9 | −40 °C to −1.1 °C | Zones where it can be grown as an annual — not a frost-tolerance rating |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 3–9 | −34 °C and warmer | Zones where it can be grown as an annual — not a frost-tolerance rating |
| Australian (ANBG) zone | Zone 1–5 | −15 °C to 10 °C | Zones where it can be grown as an annual — not a frost-tolerance rating |
As a tender annual, Annual ryegrass doesn't overwinter — the zone range shows where the growing season supports it. See the RHS rating for its actual cold tolerance.
Growing notes
- Not a nitrogen fixer — its value is rapid soil cover and erosion control
- Establishes faster than almost any other cover — useful for stabilising bare or eroded ground
- Terminate before seed set; can become a volunteer weed otherwise
Categories
Related plants
Cross-check Annual ryegrass against your zones