Other common names
ash of Jerusalem, common dyer's weed, dyer's weed, dyer's woad, Jerusalem ash
Annual Biennial
An upright biennial, or sometimes a short-lived perennial, up to 1.2m high, with basal rosettes of oblanceolate leaves, stems with arrow-shaped leaves, and heads of yellow flowers in early summer, followed by brown seedheads in late summer; the flowers are good for bees, and the famous blue dye is obtained from the leaves
Position
Full sun
Soil Types
Chalk, Clay, Loam, Sand
Max Height
1-1.5 metres
Max Spread
0.5-1 metres