Polemoniaceae: an attractive, upright perennial to 1m. Found in grassy places and scree slopes in limestone areas. The flowers are from 2-3cm across, blue with 5 petal-like corolla lobes, in spikes from June-July. The leaves are alternate and pinnate with 6-12 pairs of leaflets. Locally native in Northern England, and naturalised elsewhere. Native to Northern and central Europe, including Britain, to Siberia and the Caucasus.
The herb has astringent and diaphoretic properties. It was formerly used internally in the treatment of a wide range of conditions ranging from headaches to fevers and epilepsy.
Very easily grown plant, preferring a moist well-drained fertile soil in sun or semi-shade, but dislikes damp or heavy soils. Cats are strongly attracted by the smell of this plant and will frequently roll around on it.
Sow seeds in autumn or spring in a cold frame autumn or cool greenhouse. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer.