Details
 
 
 
Rudbeckia 'Goldstrum' is an herbaceous perennial forming a clump to 60cm in height, with erect stems bearing narrowly ovate leaves and dark-eyed, deep yellow flowers to 12cm across
 
 
 
Hardiness
 
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
 
H6 - Hardy in all of UK and northern Europe (-20 to -15)
 
 
 
Sunlight
 
Full sun, Partial shade
 
Aspect
 
East-facing, South-facing, West-facing
 
Exposure
 
Sheltered or Exposed
 
 
 
Moisture
 
Moist but well-drained
 
 
 
Soil
 
Chalk, Clay, Loam
 
 
 
pH
 
Acid, Alkaline or Neutral
 
 
 
Size
 
Ultimate height
 
0.1 - 0.6 metres
 
Ultimate spread
 
0.5- 1 metres
 
Time to Ultimate size
 
About 2 ? 5 Years
 
 
 
How to grow
 
Cultivation
 
Easy to grow if given full sun or partial shade and a moderately fertile soil that is moist but well-drained; a good choice for improved clay soils
 
 
 
Propagation
 
Propagate by seed autumn or spring. Propagate by 
 
Suggested planting locations and garden types
 
Flower borders and beds Cut Flowers Cottage & Informal Garden Prairie Planting
 
How to care
 
Pruning
 
Deadhead faded flowers
 
Pests
 
Generally pest free
 
 
 
Diseases
 
Generally disease free
 
 
 
Source: rhs.org.uk