Details
Rozanne is a vigorous spreading perennial to 60cm tall, with neat, dense, lobed foliage and bowl-shaped violet-blue flowers 5cm wide, with a white centre, opening from early summer to early autumn. Shortlisted for the Chelsea Plant of the Centenary for the decade 1993-2002, and winner of the public vote.

Hardiness
H7 - Hardy in the severest European continental climates (< -20)

Aspect
South-facing or North-facing or West-facing or East-facing

Exposure
Exposed or Sheltered

Moisture
Well-drained, Moist but well-drained

Soil
Sand, Clay, Chalk, Loam

pH
Acid, Alkaline, Neutral

Size
Ultimate height
0.5-1 metres
Ultimate spread
0.5-1 metres
Time to ultimate height
2-5 years

How to grow
Cultivation
Grow in any, moderately fertile soil apart from waterlogged soils. Full sun or partial shade is best but shade is tolerated
Propagation
Propagate by division in spring or propagate by basal cuttings in early to mid spring and root with bottom heat
Suggested planting locations and garden types
Flower borders and beds Ground Cover Underplanting of Roses and Shrubs Cottage & Informal Garden Gravel Garden

How to care
Pruning
Remove flowered stems and old leaves to encourage the production of fresh leaves and flowers
Pests
Can get vine weevil, capsid bug and sawflies
Diseases
May be affected by a downy mildew and powdery mildews