Senna

Senna alexandrina

Drought-tolerant North African shrub. Leaves and pods are a powerful stimulant laxative — the source of most over-the-counter laxative preparations.

Hardiness ratings

Senna hardiness across the four zone systems
SystemRatingTemperature rangeHow 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

  • Stimulant laxative — habit-forming with prolonged use; not for routine use beyond 1–2 weeks
  • Causes dependency of the bowel if taken continuously
  • Contraindicated in pregnancy and in inflammatory bowel conditions
  • Always consult a qualified medical or herbal practitioner before using any plant medicinally

Categories

Related plants

Cross-check Senna against your zones

Reference

Senna on Wikipedia