Large South American tree producing spectacular pink-purple trumpet flowers in spring before leaves emerge. Inner bark contains lapachol — antimicrobial and antifungal.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 9–12 | −6.7 °C to 15.6 °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 5–7 | 5 °C and warmer | Plant tolerates down to this zone |
Growing notes
- Spring flowering en masse on bare branches is a defining seasonal event in subtropical streetscapes
- Lapachol can be toxic in high doses — anticoagulant activity noted
- Always consult a qualified medical or herbal practitioner before using any plant medicinally
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Related plants
Cross-check Pau D'Arco against your zones