Wetland-edge European shrub. Aged bark is a stimulant laxative similar to senna; only the dried-and-aged bark is safe — fresh bark causes severe vomiting.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–7 | −40 °C to −12.2 °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 3–7 | −34 °C to −7 °C | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 1–3 | −15 °C to 0 °C | Plant tolerates down to this zone |
Growing notes
- Critical foodplant for the brimstone butterfly larva — without alder buckthorn the brimstone disappears
- Brilliant yellow autumn foliage — striking seasonal display
- Stimulant laxative — same cautions as senna; not for prolonged use
- Fresh bark must be aged at least one year (or heated) before use
- Always consult a qualified medical or herbal practitioner before using any plant medicinally
Categories
Related plants
Cross-check Buckthorn — Alder against your zones