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Herbaceous Perennial

Commelina tuberosa Coelestis Group

dayflower Coelestis Group

Coelestis Group are tuberous perennials which form a spreading clump of erect leafy stems, with vivid blue flowers in summer and autumn

Other common names
blue spiderwort
day flower
Synonyms
Commelina coelestis

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Blue Green
Autumn Blue Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

South–facing or North–facing or West–facing or East–facing

Exposure
Sheltered
Hardiness
H3
Botanical details
Family
Commelinaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus

Commelina can be annuals or perennials, forming mats or clumps with usually lance-shaped leaves and 3-petalled flowers emerging in succession from boat-like bracts

Name status

Accepted

How to grow

Cultivation

Grow in a fertile, well-drained soil in a warm, sheltered site in sun or partial shade. Provide a deep, dry winter mulch or in cold areas, lift plants and over winter in frost-free conditions

Propagation

Propagate by seed in spring, sown at 13-18°C or propagate by division in spring

Suggested planting locations and garden types
  • Cottage and informal garden
  • Flower borders and beds
Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free

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