Tall hardwood eucalypt of southwestern Western Australia, reaching 40 m, with the dense red heartwood that is the iconic timber of WA construction — flooring, joinery, structural beams, and railway sleepers.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 9–11 | −6.7 °C to 10 °C | Plant tolerates down to this zone |
| RHS hardiness rating | H3 | −5 °C to 1 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 9 | −1 °C and warmer | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 3–7 | −5 °C and warmer | Plant tolerates down to this zone |
Growing notes
- Heartwood — dense, hard, deep red, rot-resistant — the principal hardwood of Western Australian construction, joinery, and flooring; used historically for railway sleepers and street paving blocks shipped worldwide
- WARNING: Jarrah dieback (Phytophthora cinnamomi) — a serious imported soil-borne disease threatening native jarrah forest, do not move soil from infected to uninfected areas, restrict use to nursery-certified stock
- Drought tolerant and fire-tolerant in maturity — adapted to the Mediterranean climate and fire regime of southwestern Western Australia
- Slow growing — wild jarrah trees yielding old-growth timber are now centuries old and tightly regulated
- Not reliably hardy outdoors in Canada — Canadian zone values shown represent the system maximum and do not imply garden cultivation north of the warmest coastal pockets.
Pet caution: Jarrah is listed as potentially harmful to cats and/or dogs. Keep pets from grazing on it, and contact a vet if you suspect your animal has eaten some.
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Related plants
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