Details
Allium 'Summer Drummer' is an extremely tall and late-flowering ornamental cultivar. Spherical, tightly-packed flowerheads of small, pale purple flowers are borne after midsummer
Characteristics
 
Hardiness
H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
 
Sunlight
Full Sun
 
Aspect
South-facing or North-facing or West-facing or East-facing
 
Exposure
Sheltered
 
Soil
Chalk, Clay, Sand and Loam
 
Moisture
Well-drained, Moist but well-drained
 
pH
Acid, Alkaline, Neutral
 
Size
Ultimate height
1.5-2.5 metres
Ultimate spread
0-0.1 metre
Time to ultimate height
1-2 years
 
How to grow
Cultivation
Easy to grow in fertile well-drained soil in full sun. Add grit when grown in clay soils to improve drainage. Plant in autumn. 
 
Propagation
Propagate by offsets in autumn
 
Suggested planting locations and garden types
Flower borders and beds Cut Flowers Cottage & Informal Garden City & Courtyard Gardens
 
How to care
Pruning
No pruning required
Pests
Generally pest free
Diseases
Onion white rot and a downy mildew may occur