Glandora oleifolia

RHS Plant Profile
olive-leaved gromwell

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olive-leaved gromwell RHS 1999
olive-leaved gromwell RHS 1999
olive-leaved gromwell RHS 1999
olive-leaved gromwell Dorling Kindersley 2003

Synonyms

Lithospermum oleifolium
Lithodora oleifolium
Lithodora oleifolia

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Alpine Rockery Shrubs
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A prostrate evergreen shrub to 15cm in height, making a wide mat of silky oval leaves, with sky-blue, funnel-shaped flowers 2cm in length, in short racemes in early summer

Position

Full sun

Soil Types

Chalk, Loam

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
5–10 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam
Moisture
Well–drained
pH
Alkaline or Neutral

Position

Full sun
Aspect
South–facing or East–facing
Exposure
Exposed
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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Boraginaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Matforming
Genus
A genus of flowering, evergreen, shrubby plants from borage family. They are cultivated for their five-lobed, funnel-shaped, blue or white flowers produced in cymes in summer. Leaves are linear, lance-shaped or elliptic, densely hairy
Name Status
Correct
Plant Range
SE Pyrenees

How to Grow

Cultivation

Grow in well-drained, preferably alkaline to neutral soil in full sun

Propagation

Propagate by removing rooted suckers in spring

Suggested planting locations and garden types

  • Cottage and informal garden
  • City and courtyard gardens
  • Coastal
  • Gravel garden
  • Patio and container plants
  • Rock garden
  • Banks and slopes
  • Flower borders and beds

Pruning

Pruning group 8; or pruning group 10 after flowering

Pests

Generally pest-free

Diseases

Generally disease-free