Question

Leaves of this plant are natural source of blue dye its cultivation was started by the British

Answer 1

Answer:

Indigo

Explanation:

Indigofera tinctoria, also called true indigo, is a species of plant from the bean family that was one of the original sources of indigo dye.

Answer 2

Answer:

Since ancient times, woad was an important source of blue dye and was cultivated throughout Europe, especially in Western and Southern Europe. In medieval times there were important woad-growing regions in England, Germany and France