Alder — Common

Alnus glutinosa

Riparian European tree, one of the few non-leguminous nitrogen fixers thanks to its Frankia root symbiosis. Bark is a traditional astringent for sore throats.

Hardiness ratings

Alder — Common hardiness across the four zone systems
SystemRatingTemperature rangeHow 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

  • Tolerates waterlogged soils that kill most other trees
  • Excellent host substrate for cultivated reishi mushroom (Ganoderma lucidum) on cut logs
  • Always consult a qualified medical or herbal practitioner before using any plant medicinally

Categories

Related plants

Cross-check Alder — Common against your zones

Reference

Alder — Common on Wikipedia