Solomon's seal

Polygonatum biflorum

Arching woodland perennial with paired white pendant flowers under each leaf node. Rhizomes used in folk medicine for connective-tissue and joint support.

Hardiness ratings

Solomon's seal hardiness across the four zone systems
SystemRatingTemperature rangeHow to read it
USDA hardiness zone Zone 3–8 −40 °C to −6.7 °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 3–8 −34 °C to −1 °C Plant tolerates down to this zone
Australian (ANBG) zone Zone 1–4 −15 °C to 5 °C Plant tolerates down to this zone

Growing notes

  • Spring-flowering — pendant flowers along arching stems are a reliable seasonal marker
  • Berries and rhizome have some toxicity — never use raw and only with practitioner guidance
  • Always consult a qualified medical or herbal practitioner before using any plant medicinally

Pet caution: Solomon's seal 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.

Categories

Related plants

Cross-check Solomon's seal against your zones

Reference

Solomon's seal on Wikipedia