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Alpine RockeryHerbaceous Perennial

Gentiana 'Blue Silk'
  • RHS AGM

gentian 'Blue Silk'

'Blue Silk' is a perennial with trailing stems, to 20cm in length, bearing narrow leaves and upward-facing, funnel-shaped, purple-blue flowers with lighter and darker stripes

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Size
Ultimate height
Up to 10cm
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Green
Autumn Blue Purple White Green
Winter Green
Position
  • Full sun
  • Partial shade
Aspect

West–facing or South–facing or North–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H5
Botanical details
Family
Gentianaceae
Native to the UK
No
Foliage
Semi evergreen
Habit
Trailing
Genus

Gentiana can be annuals, biennials, herbaceous or evergreen perennials, mostly with showy, trumpet or salver-shaped flowers

Name status

Accepted

How to grow

Cultivation

Grow in moist but well-drained, neutral to acid, humus-rich soil in partial shade. Suitable for rock garden or peat terrace

Propagation

Propagate by seed or division of offsets in spring

Suggested planting locations and garden types
  • City and courtyard gardens
  • Gravel garden
  • Patio and container plants
  • Cottage and informal garden
  • Rock garden
Pruning

No pruning required

Pests

Slugs, snails and aphids may be seen

Diseases

Root rot may occur

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