Isatis tinctoria - Dyer's Woad, Dyers-Woad
Hgt up to 100cm Flowers June to August
Woad was originally used by ancient Britons to paint their bodies. Yellow flowers. It was once cultivated for the blue dye that can be extracted from the leaves. Harvest the leaves when fully grown. Habitat grasslands. Prefers a well drained fertile soil in a sunny site.