Perennial
Polemonium caeruleum - Polemonium, Greek valerian, Charity
Herb or Wildflower of the garden. Blue flowered border plant. Flowers June to July a herb with medicinal properties, no culinary use is known. Used in the treatment of headaches, fevers and epilepsy. Sow seed in spring in a cold frame. Position in full sun to partial shade in moist soil, prefers alkaline soils.

Sowing time for wildflowers is all year round with best results sowing either March to early May, or from August to September.