Iberis can be annuals, evergreen perennials or sub-shrubs, with narrow leaves and racemes of white, pink or purple flowers
 
Details
'Snowflake' is a compact evergreen sub-shrub to 25cm tall, with narrow, dark green leaves and short racemes of small white flowers in late spring and early summer

Hardiness
H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)

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

Exposure
Exposed or Sheltered

Moisture
Moist but well-drained

Soil
Loam, Chalk, Sand

pH
Alkaline, Neutral

Size
Ultimate height
0.1-0.5 metres
Ultimate spread
0.1-0.5 metres
Time to ultimate height
5-10 years

How to grow
Cultivation
Grows well in poor soils. Looks good in rock gardens or in walls. Can spread
Propagation
Propagate by seed and semi-hardwood cuttings
Suggested planting locations and garden types
Flower borders and beds City & Courtyard Gardens Coastal Cottage & Informal Garden Gravel Garden Rock Garden Patio & Container Plants

How to care
Pruning
Trim lightly after flowering to maintain compactness
Pests
Prone to slugs, snails and caterpillars
Diseases
Generally disease free

Info. courtesy of the RHS