Self-seeds quite readily where conditions (see cultivation) are suitable, biennial in nature.
|USDA Hardiness Zone|
|Canadian Hardiness Zone|
|RHS Hardiness Zone|
|Grows easily in lean, loose, free draining soils such as that found in rock and scree gardens.|
|Shingle and sandy beaches in Europe and England.|
|Evergreen in its home climates but in more northerly regimes with frost and snow foliage dies to the crown each autumn.|
|Easily by seed sown in the autumn, resents transplanting.|