Toad lily

Tricyrtis hirta

Japanese woodland perennial with arching stems carrying small star-shaped white flowers spotted purple — like miniature orchids — in mid-autumn. One of the last shade perennials to flower.

Hardiness ratings

Toad lily hardiness across the four zone systems
SystemRatingTemperature rangeHow to read it
USDA hardiness zone Zone 4–8 −34.4 °C to −6.7 °C Plant tolerates down to this zone
RHS hardiness rating H6 −20 °C to −15 °C Plant needs at least this level of cold tolerance
Canadian plant hardiness zone Zone 4–7 −29 °C to −7 °C Plant tolerates down to this zone
Australian (ANBG) zone Zone 2–5 −10 °C to 10 °C Plant tolerates down to this zone

Growing notes

  • Flowers September–October in deep shade — among the last shade-tolerant perennials of the year
  • Tolerates dry summer shade once established — useful under trees where other late-season flowers struggle
  • Slugs can damage emerging foliage in spring — protect new growth
  • Hardy and long lived

Categories

Related plants

Cross-check Toad lily against your zones

Reference

Toad lily on Wikipedia