Gentiana saxosa

RHS Plant Profile
rock gentian

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Alpine Rockery Herbaceous Perennial
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A summer flowering evergreen perennial. It has basal rosettes of fleshy, dark green spoon-shaped, sometimes linear, often with a brown-purple tinge. Between 1-5 flowers are found on short leafy stems. Flowers are white, 2cm long, bell-shaped, with faint green or purple-brown veining

Position

Full shade, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0-0.1 metre

Size

Time to Maturity
2–5 years
Max Spread
0-0.1 metre
Max Height
Up to 10 cm

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full shade Partial shade
Aspect
South–facing or East–facing or West–facing
Exposure
Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Gentianaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Clump forming
Genus
Gentiana can be annuals, biennials, herbaceous or evergreen perennials, mostly with showy, trumpet or salver-shaped flowers
Name Status
Correct
Plant Range
New Zealand

How to Grow

Cultivation

Plant in moist, well-drained, humus rich soil. If summers are cool and damp, plant in full-sun. Shade preferred for hot sun and warm, dry summers. Would be suitable for rock and alpine gardens

Propagation

Propagate by seed or division

Suggested planting locations and garden types

  • Patio and container plants
  • Gravel garden
  • Rock garden
  • Low Maintenance

Pruning

No pruning required

Pests

May be susceptible to aphids, slugs and snails

Diseases

May be susceptible to soft rot