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Primula 'Crescendo Blue Shades' (Crescendo Series) (Pr/Poly) AGM

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© RHS 1997

Characteristics

Plant type

Annual/Biennial, Bedding or Herbaceous Perennial

Habit

Clump-forming

Resilience

Hardiness

H5 (hardy - cold winter)

Colour

Flower

Blue and Yellow in Spring and Winter

Foliage

Green in Autumn, Spring, Summer and Winter

Size

Ultimate height

0.1-0.5 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

1-2 years


Preferred common name

polyanthus 'Crescendo Blue Shades'

Family

Primulaceae


Primula are herbaceous or semi-evergreen perennials, forming a basal rosette of simple leaves, with salver-shaped or bell-shaped flowers which may be solitary or carried in an umbel or in whorls on an erect stem

'Crescendo Blue Shades' is a short-lived perennial to 25cm, usually grown as an annual, forming a rosette of oblong leaves, with erect stems bearing an umbel of large blue flowers with conspicuous yellow eyes

How to grow

Sunlight

  • Full sun
  • Part shade

Aspect

  • South-facing or East-facing
  • Sheltered or Exposed

Cultivation

Grow in fertile, humus-rich, moist but well-drained soil in full sun or partial shade, do not allow to dry out in hot weather

Soil

  • Moist but well-drained
  • Neutral or Acid
  • Loam or Sand

Propagation

Propagate by seed sown in spring

Suggested planting locations and garden types

City/Courtyard Gardens, Cottage/Informal Garden, Flower borders and beds, Garden Edging, Patio/Container Plants or Underplanting of Roses and Shrubs


How to care

Pruning

Cut back after flowering

Pests

May be attacked by aphids, glasshouse red spider mite, leafhoppers, vine weevil and slugs

Diseases

May be subject to grey moulds, primula brown core and a virus