Used as herb as a saffron substitue, both medicinally and dyestuff. Natural habitat is wet land, moorlands, bogs and wet heaths. Having distinctive blue flowers on a tall leafy spike, leaves are tinged blackish violet. Habitat damp woodland and meadows. Hgt to 100cm Flowers July to September An alternative herb.
Natural habitat is waste ground, hedgerows but occasionaly found in meadows and woodland.
Prefers a moist soil in full sun to semi shade. The root, leaves and stalk can be used raw or cooked, the seed is also known to be used sprouted. It is cultivated in Japan for its edible root. Best sown late autumn or early spring in situ, pre soaking or scarification of seeds aids germination. Found in damp meadows and grassy places.