Details
'Atropurpureum' is an upright perennial forming a clump of branching, leafy stems with spherical, deep red flower-heads 3cm across in summer

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

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

Exposure
Exposed or Sheltered

Moisture
Moist but well-drained

Soil
Sand, Loam, Chalk, Loam

pH
Acid, Alkaline, Neutral

Size
Ultimate height
1-1.5 metres
Ultimate spread
0.1-0.5 metres
Time to ultimate height
2-5 years

How to grow
Cultivation
Grow in a moist but well-drained soil in full sun; can tolerate some dryness and partial shade.
Propagation
Propagate by seed sown in pots in a cold frame in spring or propagate by division in spring or autumn.
Suggested planting locations and garden types
Flower borders and beds Cut Flowers Cottage & Informal Garden Wildlife Gardens Wildflower meadow.

How to care
Pruning
If self-seeding is a problem then cut back hard after flowering.
Pests
Generally pest free
Diseases
May be infected by powdery mildews