Dianthus amurensis Siberian Blues

Dianthus amurensis Siberian Blues
Compact, bushy mounds of bluish evergreen foliage erupt into a sea of mauve-blue flowers in late spring and are the closest yet to a true blue Dianthus. Ideal planted in borders, rockeries and containers, flowering over a long period each summer for many, many years. [Zone: 3, 4, 5, 6, 7, 8]
Sowing:
Sow February to June or September to October. Sow seed on the surface of lightly firmed, moist seed compost in pots or trays and cover with a very light sprinkling of compost or vermiculite. Seal container inside a polythene bag and keep at a temperature of between 59-68F. After sowing, do not exclude light as this helps germination. Keep the surface of the compost moist but not waterlogged; germination usually takes 14 to 30 days.
Growing:
When large enough to handle, transplant seedlings into 3 inch pots or trays. Plant out after all risk of frost, 12 inches apart.
Aftercare:
For best results, provide any ordinary, well-drained soil in full sun.