Used by the Britons to paint their bodies blue to ward off the Romans, remained in use until the 1630s as a dye for fabrics until indigo became more popular.
Type: Hardy Biennial
Height: 40cm in first year, 1m+ in second year when in flower. 
Spread: 40cm 
Soil type: Well drained
Aspect: Sun 
Flower colour: Yellow
Flowering time: Second summer