Consolida ajacis

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giant larkspur

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Other common names

larkspur, annual larkspur, rocket larkspur

Synonyms

Consolida ambigua
Delphinium ajacis
Delphinium ambiguum

Plants for pollinators
Annual Biennial
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An annual up to 1m high with feathery green leaves and flowers which are usually deep blue but can also be pink, white, or mixed blue and pink, in summer

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Alkaline or Neutral

Position

Full sun
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)
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Ranunculaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Genus
Consolida are upright annuals with deeply pinnately or palmately dissected leaves, and racemes or panicles of small, spurred, delphium-like flowers in summer
Name Status
Correct
Plant Range
Mediterranean

How to Grow

Cultivation

Grow in well-drained soil in full sun; for cut flowers, cut when only the lowermost buds are open

Propagation

Propagate by seed: sow in early autumn and prick out in early spring, sow under cover in early spring, or sow outside in late spring

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Wildlife gardens
  • Cut flowers
  • Flower borders and beds

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free