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Alpine RockeryHerbaceous Perennial

Dodecatheon dentatum

toothed American cowslip

D. dentatum is an herbaceous perennial forming a clump of toothed, oval leaves, with nodding white flowers 2cm in length in terminal umbels on stems to 30cm in height in late spring

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Size
Ultimate height
0.1–0.5 metres
Time to ultimate height
2–5 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 White Green
Summer Green
Autumn Green
Winter
Position
  • Full sun
  • Partial shade
Aspect

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

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Primulaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Genus

Dodecatheon are summer-dormant herbaceous perennials with basal rosettes of simple leaves and erect or arching stems bearing umbels of cyclamen-like flowers with strongly reflexed petals

Name status

Correct

Plant range
W North America

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How to grow

Cultivation

Grow in a moist but well-drained, humus-rich soil in full sun or partial shade. Suitable for woodland or rock garden

Propagation

Propagate by seed in pots in an open frame as soon as seed is ripe; seed needs exposure to cold before it will germinate or propagate by division in spring

Suggested planting locations and garden types
  • Cottage and informal garden
  • Rock garden
  • Flower borders and beds
  • Underplanting of roses and shrubs
Pruning

No pruning required

Pests

May be damaged by slugs and snails

Diseases

Generally disease free

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