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Annual BiennialBedding

Lobelia erinus 'Cambridge Blue'
  • RHS AGM

trailing lobelia 'Cambridge Blue'

'Cambridge Blue' is a compact annual to 15cm, forming a low hummock of narrow foliage, with clear light blue, two-lipped flowers 2cm across in summer and autumn

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
1–2 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring
Summer Blue Green
Autumn Blue Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

South–facing or West–facing or East–facing

Exposure
Exposed or Sheltered
Hardiness
H2
Botanical details
Family
Campanulaceae
Native to the UK
No
Foliage
Deciduous
Habit
Matforming
Genus

Lobelia can be annuals, perennials or shrubs, with simple leaves and showy 2-lipped flowers that may be solitary or in racemes or panicles

Name status

Accepted

How to grow

Cultivation

Ideal edging for bedding schemes or in a container especially in partial shade. A moist soil or compost will prolong flowering, as will liquid feeding

Propagation

Propagate by seed

Suggested planting locations and garden types
  • City and courtyard gardens
  • Patio and container plants
  • Cottage and informal garden
  • Garden edging
  • Flower borders and beds
Pruning

Remove after flowering ceases in autumn

Pests

Generally pest free

Diseases

Generally disease free

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