Polemonium Caeruleum - Jacobs Ladder
This is a really easy plant to grow and will flower all summer. The flowers are blue, and the plant grows to a height of 30 - 90cm.
Sow in spring or in the late summer/autumn. The seeds are best planted in pots and placed in an cold greenhouse or cold frame. Germination takes up to 2 months. Seedlings should then be planted out in the spring.