Drought-adapted shrub or small tree of the western North American mountains and high deserts. Distinctive feathery seed plumes in autumn are an unusual ornamental feature.
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 4–9 | −29 °C and warmer | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 1–5 | −15 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Fixes nitrogen via Frankia bacteria (actinorhizal symbiosis) rather than the Rhizobium of legumes — a non-legume nitrogen fixer
- Extremely drought tolerant — established plants survive on wild rainfall in semi-arid regions
- Important browse plant for mule deer and elk in its native range
Categories
Related plants
Cross-check Mountain mahogany against your zones