Details
'Blue Ensign' is a strong-growing deciduous perennial to 30cm tall, with broad, dark green leaves and compact clusters of large, violet-blue flowers in spring.

Hardiness
H6 - Hardy in all of UK and northern Europe (-20 to -15)

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

Exposure
Sheltered

Moisture
 
Moist but well-drained

Soil
Clay, Chalk, Loam

pH
Acid, Alkaline, Neutral

Size
Ultimate height
0.1-0.5 metres
Ultimate spread
0.1-0.5 metres
Time to ultimate height
2-5 years

How to grow
Cultivation
Grow in humus-rich, fertile, moist but not waterlogged soil in full or partial shade
Propagation
Propagate by division after flowering or in autumn
Suggested planting locations and garden types
Banks and Slopes Flower borders and beds Ground Cover City & Courtyard Gardens Coastal Cottage & Informal Garden Wildlife Gardens

How to care
Pruning
Remove old leaves after flowering
Pests
Generally pest free
Diseases
May be subject to powdery mildews in dry conditions