Coronilla valentina subsp. glauca 'Brockhill Blue'

RHS Plant Profile
glaucous scorpion-vetch 'Brockhill Blue'

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Synonyms

Coronilla 'Brockhill Blue'

Shrubs
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A compact, evergreen shrub to around 75cm tall with blue-green foliage and bright yellow, fragrant, pea-like flowers produced from late winter into spring

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
5–10 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

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

Position

Full sun
Aspect
South–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)
H4

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Fabaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
Coronilla can be annuals, herbaceous perennials or deciduous or evergreen shrubs, with pinnate leaves and often scented, pea-like flowers in compact umbels in the leaf axils
Name Status
Unresolved

How to Grow

Cultivation

Grow in a warm, sunny, sheltered position in well-drained soil. Needs winter protection in cold areas

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Mediterranean climate plants
  • Patio and container plants
  • Flower borders and beds
  • Wall side borders

Pruning

Pruning group 1

Pests

Generally pest-free

Diseases

May be susceptible to honey fungus