List 11 – Gentiana asclepiadea

Gentiana asclepiadea (willow gentian)

Family: Gentianaceae

11.1 gentiana asclepiadea

USDA Hardiness Zone: 5-7

Size:

  • 10cm-50cm
  • 50cm-1m tall

Form:

  • Clump-forming

Soil & Water requirements:

  • Will grow in general garden conditions but does best in moist to wet soil
  • Will migrate toward moisture
  • Well-drained
  • Not great in open unless soil is rich and moist

Exposure:

  • Partial shade
  • Should be shaded from hottest sun; unless summer climate is cool and damp

Leaves:

  • Born spirally on stem
  • Lanceolate leaves
  • Interesting posture
  • Herbaceous perennial
  • Leaves turn yellowish in fall

Flowers:

  • Buds are distinct; dark blue and pointed; then opening into flowers
  • Flowers are deep purple/blue and trumpet-shaped; great colour
  • Five petals; broad, open tube; five recurved corolla lobes
  • 4-5cm long
  • Three week bloom in mid-summer

Suitable uses:

  • Flower borders
  • Rock gardens
  • Cottage or informal gardens

Potential pairings:

  • Salvia guaranitica (black-and-blue salvia)
  • Colour contrasts: pinks; reds
  • Colour compliments: purples; blues

Other:

  • One of the easiest gentian to grow
  • Best not to grow with aggressive perennials

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