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Dodecatheon dentatum AGM

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Characteristics

Plant type

Alpine/Rockery or Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H5 (hardy - cold winter)

Colour

Flower

White in Spring

Foliage

Green in Autumn, Spring and Summer

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

2-5 years


Preferred common name

toothed American cowslip

Family

Primulaceae


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

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

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing, North-facing, West-facing or East-facing
  • Sheltered

Cultivation

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

Soil

  • Moist but well-drained
  • Acid, Alkaline or Neutral
  • Chalk, Clay, Sand or Loam

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/Informal Garden, Flower borders and beds, Rock Garden or Underplanting of Roses and Shrubs


How to care

Pruning

No pruning required

Pests

May be damaged by slugs and snails

Diseases

Generally disease free