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Alpine RockeryHerbaceous Perennial

Lobelia pedunculata

blue star creeper

A vigorous evergreen perennial to 2cm tall, quickly forming a wide mat of tiny rounded leaves, with short-stalked star-shaped pale blue flowers in summer; male and female flowers are on separate plants, so it is unlikely to fruit

Synonyms
Pratia pedunculata
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Size
Ultimate height
Up to 10cm
Time to ultimate height
1–2 years
Ultimate spread
1–1.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Blue Green
Autumn Green
Winter Green
Position
  • Full shade
  • Partial shade
Aspect

North–facing or West–facing or East–facing

Exposure
Sheltered
Hardiness
H4
Botanical details
Family
Campanulaceae
Native to GB / Ireland
No
Foliage
Evergreen
Habit
Matforming
Potentially harmful
Harmful if eaten, skin irritant. Wear gloves and other protective equipment when handling Wear gloves and other protective equipment when handling. Pets: Harmful if eaten, skin irritant. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
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

Correct

Plant range
Australia

How to grow

Cultivation

Grow in fertile, loamy, moist to well-drained soil in partial or deep shade

Propagation

Propagate by division at any time of year, keeping the divisions well watered until they are established

Suggested planting locations and garden types
  • Cottage and informal garden
  • Patio and container plants
  • Rock garden
  • Flower borders and beds
  • Ground cover
Pruning

No pruning required

Pests

May be susceptible to slugs

Diseases

Generally disease-free

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.